辽宁省不同株型玉米杂交种适宜密度和区试设置的研究
摘要
随着玉米育种和栽培水平的不断提高,玉米的单产也在不断提高。目前在辽宁省育成及推广的品种中,紧凑型、半紧凑型和平展型三类品种并存。在提高产量的诸多途径中,通过增加密度使群体增产已逐渐被大多数育种家和广大农民所接受。但就辽宁省而言,在不同生态地区选用什么样的品种和相应的种植密度才能发挥最大的产量潜力,各类品种的区域试验密度如何设置等问题尚缺乏试验依据。本试验于2006年和2007年在辽宁省沈阳、铁岭、朝阳、大连和丹东等五个不同生态地区连续进行两年。试验采用二因素裂区试验设计,选用目前生产上大面积推广的三个不同株型的代表性品种,平展型品种连玉16、半紧凑型品种丹玉39和紧凑型品种郑单958,每个品种设置六种密度。通过统计分析产量及产量构成因素、农艺性状和品质性状,获得以下主要结论:
1.通过品种间、密度间及品种与密度互作的产量分析比较,获得各个试点适宜种植的品种与密度。
(1)沈阳试点三种不同株型品种的共同适宜种植密度为4500株/667m~2,品种选用以郑单958为代表的紧凑型品种为主,适宜种植为4500-5000株/667m~2;以平展型品种连玉16和半紧凑型品种丹玉39为辅,其适宜种植分别为3200-4500株/667m~2和3800-5000株/667m~2。
(2)铁岭试点三种不同株型品种的共同适宜种植密度为3800-4500株/667m~2;首选品种是以郑单958为代表的紧凑型品种,适宜种植密度3800-5000株/667m~2;其次是半紧凑型品种丹玉39和平展型品种连玉16,各自的适宜密度分别为3800-4500株/667m~2和2600-3200株/667m~2。
(3)朝阳试点适宜种植的品种仍然是以郑单958为代表的紧凑型品种为主,适宜种植密度为3800-4500株/667m~2;其次是半紧凑型品种丹玉39和平展型品种连玉16,各自的适宜密度分别为2600-3200株/667m~2和2600株/667m~2。三个品种共同的适宜密度为3800-4500株/667m~2;
(4)大连试点三个品种共同的适宜密度为2600-3800株/667m~2;品种选用以丹玉39为代表的半紧凑型品种为主,同时也可大面积推广以连玉16为代表的平展型品种和以郑单958为代表的紧凑型品种,它们各自的适宜密度分别为3800株/667m~2、2200-2600株/667m~2和3800-4500株/667m~2。
(5)丹东试点三个品种共同的适宜密度为3200-4500株/667m~2;首选品种也是以郑单958为代表的紧凑型品种,其次是以丹玉39为代表的半紧凑型品种和以连玉16为代表的平展型品种,它们各自的适宜密度分别为3800-5000株/667m~2、3200-3800株/667m~2和2600-3800株/667m~2。
2.通过对三个不同株型品种在不同地点和不同密度下的产量稳定性分析,提出了省级区域试验的设置方法。
三个品种在辽宁省同一熟期组不同生态地区的共同适宜密度分别是,平展型品种连玉16为3200株/667m~2;半紧凑品种丹玉39为3800株/667m~2;紧凑型品种郑单958为4500株/667m~2。在不同地点和不同年份,三种不同株型(耐密性)品种共同的适宜密度为3200株/667m~2、3800株/667m~2和4500株/667m~2,其中3800株/667m~2密度的高产和稳产性的综合表现最佳。
依据上述试验结果,在辽宁省玉米新品种选育程序中,品种比较试验可采用3800株/667m~2的密度对不同株型或耐密性的品种进行统一评价。在省级预备试验中,可采用3800株/667m~2的统一密度对参试品种进行初选,然后对进入区域试验的品种,再根据育种者提供的资料分成平展型(不耐密植型)、半紧凑型(中度耐密型)和紧凑型(耐密植型)分别按3200株/667m~2、3800株/667m~2和4500株/667m~2的密度进行分组试验。
3.通过产量、品质和其它农艺性状的比较,阐明了三个不同株型品种的相对差异。
(1)以连玉16为代表的平展型品种在本次试验中表现为生育期较长,叶片数较多,持绿性较差,株高、穗位高偏高,果穗着生位置偏高;果穗较大,穗粒数多,百粒重较大。在各个密度下有效穗数少,总粒数较少。籽粒粗脂肪含量较高。以丹玉39为代表的半紧凑型品种表现为生育期适中,叶片数适中,持绿性适中,株高、穗位高适中,果穗着生位置适中;果穗较大,穗粒数较多,百粒重高。在各个密度下有效穗数居于中等水平,总粒数同样居于中等水平。籽粒粗蛋白质含量和籽粒赖氨酸含量较高。以郑单958为代表的紧凑型品种表现为生育期较短,叶片数适中,持绿性好,株高、穗位高适中,果穗着生位置适中;郑单958的果穗较小,穗粒数少,百粒重小。在各个密度处理下有效穗数多,总粒数多。籽粒粗淀粉含量和籽粒容重较高。
(2)籽粒品质性状的研究表明,玉米在辽中北地区种植对提高籽粒的蛋白质含量有利,以提高蛋白质含量为生产目的的玉米品种适宜在沈阳和铁岭两地种植;朝阳、大连和丹东试点玉米淀粉含量较高,辽西地区、辽南地区和辽东南地区适宜生产高淀粉玉米。种植高油玉米可以选择朝阳和丹东地区。
本文在进行试验结果的统计分析时,在二因素裂区的基础上,将年份和地点视为两个因素,尝试了进行四因素裂区分析的方法,此方法鲜有人使用;根据不同株型和生态条件进行品种密度和品质布局的研究方法,也不多见。本文通过对不同株型品种适宜密度的研究为辽宁省玉米品种布局提出了新的观点,同时也为辽宁省玉米区域试验密度的设置和品种推广提供了理论依据和参考。
With breeding level and cultivation level increasing,yields of maize increase constantly.There are three plant-types,flat type,semi-compact type and compact type in Liaoning Province.In many methods to increase grain yields,increasing plant density to get more grain yields is accepted by general breeding scientist and farmers. It is unclear that what kind of hybrids and plant density are suitable to plant in order to elicit latent faculties to get more grains yields in different ecological regions of Liaoning Province.Questions such as how to fix the plant density for each type of hybrid in regional test are lacks of facts.There are five locations in different ecological regions in Liaoning Province are chosen and plant three maize hybrid with different plant-types in six density treatments doing a split block experiment with two effects.Researches on yield,yield components,agronomic characters,ear characters and nutritional characters gain following result.
1.According to the results on varieties,densities and variety×density,we can investigate suitable variety and density for each location.
(1) The same suitable density for three hybrids with different plant-types is 4500 plants per 667m~2 in Shenyang.The representation of compact hybrid Zhengdan958 is chosen as the main variety.And suitable density for Zhengdan958 is 4500-5000 plants per 667m~2.The representation of semi-compact hybrid Danyu39 and flat hybrid Lianyu 16 are chosen as the secondary variety.And suitable densities for Danyu39 and Zhengdan958 are 3200-4500 plants per 667m~2 and 3800-5000 plants per 667m~2.
(2) The same suitable density for three hybrids with different plant-types is 3800-4500 plants per 667m~2 in Tieling.The representation of compact hybrid Zhengdan958 is chosen as the main variety.And suitable density for Zhengdan958 is 3800-5000 plants per 667m~2.The representation of semi-compact hybrid Danyu39 and flat hybrid Lianyu16 are chosen as the secondary variety.And suitable densities for Danyu39 and Lianyu16 are 3800-4500 plants per 667m~2 and 2600-3200 plants per 667m~2.
(3) The same suitable density for three hybrids with different plant-types is 3800-4500 plants per 667m~2 in Chaoyang.The representation of compact hybrid Zhengdan958 is chosen as the main variety.And suitable density for Zhengdan958 is 3800-4500 plants per 667m~2.The representation of semi-compact hybrid Danyu39 and flat hybrid Lianyu16 are chosen as the secondary variety.And suitable densities for Danyu39 and Lianyu16 are 2600-3200 plants per 667m~2 and 2600 plants per 667m~2.
(4) The same suitable density for three hybrids with different plant-types is 2600-3800 plants per 667m~2 in Dalian.The representation of semi-compact hybrid Danyu39 is chosen as the main variety.And suitable density for Danyu39 is 3800 plants per 667m~2.The representation of compact hybrid Zhengdan958 and flat hybrid Lianyu 16 are chosen as the secondary variety.And suitable densities for Zhengdan958 and Lianyu 16 are 3800-4500 plants per 667m~2 and 2200-2600 plants per 667m~2.
(5) The same suitable density for three hybrids with different plant-types is 3200-4500 plants per 667m~2 in Tieling.The representation of compact hybrid Zhengdan958 is chosen as the main variety.And suitable density for Zhengdan958 is 3800-4500 plants per 667m~2.The representation of semi-compact hybrid Danyu39 and flat hybrid Lianyul6 are chosen as the secondary variety.And suitable densities for Danyu39 and Lianyul6 are 3200-3800 plants per 667m~2 and 2600-3800 plants per 667m~2.
Stability analysis of three hybrids with different plant-types in different locations and densities will provide setting methods for provincial regional test.
The suitable densities for three hybrids in the team with the same growth period are 3200 plants per 667m~2 for flat hybrid Lianyu16,3800 plants per 667m~2 for semi-compact hybrid Danyu39 and 4500 plants per 667m~2 for compact hybrid Zhengdan958.In different locations and years,the same suitable densities for three hybrids with different plant-type are 3200 plants per 667m~2,3800 plants per 667m~2 and 4500 plants per 667m~2.Comprehensive performance composed of high yield and high stability of 3800 is the best in three treatments above.
According the results above,in the procedure of new hybrids breeding in Liaoning Province,3800 plants per 667m~2 can be used to evaluate different plant-types and density-tolerance in variety comparative test.In pre-comparative experiment 3800 plants per 667m~2 can be used in primary selection.According to data which are provided by breeder,varieties selected to attend regional test will be devided into three groups,flat,semi-compact and compact,planted in 3200 plants per 667m~2,3800 plants per 667m~2 and 4500 plants per 667m~2.
3 Comparison of yield,nutritional and other agronomic characters illustrates differences among three varieties with different plant-types.
(1)Lianyu16 is a hybrid with flat type,which performs long growth period,more total leaves and less green leaves in maturity.Plant height,ear height and location of ear in the plant(the rate of ear height and plant height) are all high.Lianyu16's ear is the biggest in three hybrids and its ear performs more kernels and heavier 100-kernek weight,In every density treatment Lianyul6 performs less effective ears and total kernels.Its kernel gross fat content is high.Danyu39 is a hybrid with semi-compact type,which performs moderate growth period,moderate total leaves and moderate green leaves in maturity.Plant height,ear height and location of ear in the plant are all moderate.Denyu39's ear is bigger of three hybrids and its ear performs more kernels and heavier 100-kernek weight.In every density treatment Danyul6 performs moderate effective ears and total kernels.Its kernel gross protein content and kernel lysine content are high.Zhengdan958 is a hybrid with compact type,which performs short growth period,moderate total leaves and more green leaves in maturity.Plant height,ear height and location of ear in the plant are all moderate.Zhengdan958's ear is small and its ear performs less kernels and light100-kernek weight.In every density treatment Zhengdan958 performs more effective ears and total kernels.Its kernel gross starch content and kernel bulk density are high.
(2)The research on nutritional characters shows that planting maize hybrids in Shenyang and Tieling is helpful to increase kernel protein content.Chaoyang,Dalian and Dandong is suitable for the produce of maize starch.It is a good choice to plant high oil maize in Chaoyang and Dandong.
In the analysis for results of this research,years and locations are regarded as another two effects.So on the base of split block experiment with two effects,a split block experiment with four effects is performed.This method is used unusually. Doing varieties distribution according to growth period and ecological conditions is traditional method.In this paper combined with the results of this test,new points about maize varieties distribution of Liaoning Province are proposed.Research on hybrids with different plant-types provides references and bases for arrangement of regional test of Liaoning Province.
1.通过品种间、密度间及品种与密度互作的产量分析比较,获得各个试点适宜种植的品种与密度。
(1)沈阳试点三种不同株型品种的共同适宜种植密度为4500株/667m~2,品种选用以郑单958为代表的紧凑型品种为主,适宜种植为4500-5000株/667m~2;以平展型品种连玉16和半紧凑型品种丹玉39为辅,其适宜种植分别为3200-4500株/667m~2和3800-5000株/667m~2。
(2)铁岭试点三种不同株型品种的共同适宜种植密度为3800-4500株/667m~2;首选品种是以郑单958为代表的紧凑型品种,适宜种植密度3800-5000株/667m~2;其次是半紧凑型品种丹玉39和平展型品种连玉16,各自的适宜密度分别为3800-4500株/667m~2和2600-3200株/667m~2。
(3)朝阳试点适宜种植的品种仍然是以郑单958为代表的紧凑型品种为主,适宜种植密度为3800-4500株/667m~2;其次是半紧凑型品种丹玉39和平展型品种连玉16,各自的适宜密度分别为2600-3200株/667m~2和2600株/667m~2。三个品种共同的适宜密度为3800-4500株/667m~2;
(4)大连试点三个品种共同的适宜密度为2600-3800株/667m~2;品种选用以丹玉39为代表的半紧凑型品种为主,同时也可大面积推广以连玉16为代表的平展型品种和以郑单958为代表的紧凑型品种,它们各自的适宜密度分别为3800株/667m~2、2200-2600株/667m~2和3800-4500株/667m~2。
(5)丹东试点三个品种共同的适宜密度为3200-4500株/667m~2;首选品种也是以郑单958为代表的紧凑型品种,其次是以丹玉39为代表的半紧凑型品种和以连玉16为代表的平展型品种,它们各自的适宜密度分别为3800-5000株/667m~2、3200-3800株/667m~2和2600-3800株/667m~2。
2.通过对三个不同株型品种在不同地点和不同密度下的产量稳定性分析,提出了省级区域试验的设置方法。
三个品种在辽宁省同一熟期组不同生态地区的共同适宜密度分别是,平展型品种连玉16为3200株/667m~2;半紧凑品种丹玉39为3800株/667m~2;紧凑型品种郑单958为4500株/667m~2。在不同地点和不同年份,三种不同株型(耐密性)品种共同的适宜密度为3200株/667m~2、3800株/667m~2和4500株/667m~2,其中3800株/667m~2密度的高产和稳产性的综合表现最佳。
依据上述试验结果,在辽宁省玉米新品种选育程序中,品种比较试验可采用3800株/667m~2的密度对不同株型或耐密性的品种进行统一评价。在省级预备试验中,可采用3800株/667m~2的统一密度对参试品种进行初选,然后对进入区域试验的品种,再根据育种者提供的资料分成平展型(不耐密植型)、半紧凑型(中度耐密型)和紧凑型(耐密植型)分别按3200株/667m~2、3800株/667m~2和4500株/667m~2的密度进行分组试验。
3.通过产量、品质和其它农艺性状的比较,阐明了三个不同株型品种的相对差异。
(1)以连玉16为代表的平展型品种在本次试验中表现为生育期较长,叶片数较多,持绿性较差,株高、穗位高偏高,果穗着生位置偏高;果穗较大,穗粒数多,百粒重较大。在各个密度下有效穗数少,总粒数较少。籽粒粗脂肪含量较高。以丹玉39为代表的半紧凑型品种表现为生育期适中,叶片数适中,持绿性适中,株高、穗位高适中,果穗着生位置适中;果穗较大,穗粒数较多,百粒重高。在各个密度下有效穗数居于中等水平,总粒数同样居于中等水平。籽粒粗蛋白质含量和籽粒赖氨酸含量较高。以郑单958为代表的紧凑型品种表现为生育期较短,叶片数适中,持绿性好,株高、穗位高适中,果穗着生位置适中;郑单958的果穗较小,穗粒数少,百粒重小。在各个密度处理下有效穗数多,总粒数多。籽粒粗淀粉含量和籽粒容重较高。
(2)籽粒品质性状的研究表明,玉米在辽中北地区种植对提高籽粒的蛋白质含量有利,以提高蛋白质含量为生产目的的玉米品种适宜在沈阳和铁岭两地种植;朝阳、大连和丹东试点玉米淀粉含量较高,辽西地区、辽南地区和辽东南地区适宜生产高淀粉玉米。种植高油玉米可以选择朝阳和丹东地区。
本文在进行试验结果的统计分析时,在二因素裂区的基础上,将年份和地点视为两个因素,尝试了进行四因素裂区分析的方法,此方法鲜有人使用;根据不同株型和生态条件进行品种密度和品质布局的研究方法,也不多见。本文通过对不同株型品种适宜密度的研究为辽宁省玉米品种布局提出了新的观点,同时也为辽宁省玉米区域试验密度的设置和品种推广提供了理论依据和参考。
With breeding level and cultivation level increasing,yields of maize increase constantly.There are three plant-types,flat type,semi-compact type and compact type in Liaoning Province.In many methods to increase grain yields,increasing plant density to get more grain yields is accepted by general breeding scientist and farmers. It is unclear that what kind of hybrids and plant density are suitable to plant in order to elicit latent faculties to get more grains yields in different ecological regions of Liaoning Province.Questions such as how to fix the plant density for each type of hybrid in regional test are lacks of facts.There are five locations in different ecological regions in Liaoning Province are chosen and plant three maize hybrid with different plant-types in six density treatments doing a split block experiment with two effects.Researches on yield,yield components,agronomic characters,ear characters and nutritional characters gain following result.
1.According to the results on varieties,densities and variety×density,we can investigate suitable variety and density for each location.
(1) The same suitable density for three hybrids with different plant-types is 4500 plants per 667m~2 in Shenyang.The representation of compact hybrid Zhengdan958 is chosen as the main variety.And suitable density for Zhengdan958 is 4500-5000 plants per 667m~2.The representation of semi-compact hybrid Danyu39 and flat hybrid Lianyu 16 are chosen as the secondary variety.And suitable densities for Danyu39 and Zhengdan958 are 3200-4500 plants per 667m~2 and 3800-5000 plants per 667m~2.
(2) The same suitable density for three hybrids with different plant-types is 3800-4500 plants per 667m~2 in Tieling.The representation of compact hybrid Zhengdan958 is chosen as the main variety.And suitable density for Zhengdan958 is 3800-5000 plants per 667m~2.The representation of semi-compact hybrid Danyu39 and flat hybrid Lianyu16 are chosen as the secondary variety.And suitable densities for Danyu39 and Lianyu16 are 3800-4500 plants per 667m~2 and 2600-3200 plants per 667m~2.
(3) The same suitable density for three hybrids with different plant-types is 3800-4500 plants per 667m~2 in Chaoyang.The representation of compact hybrid Zhengdan958 is chosen as the main variety.And suitable density for Zhengdan958 is 3800-4500 plants per 667m~2.The representation of semi-compact hybrid Danyu39 and flat hybrid Lianyu16 are chosen as the secondary variety.And suitable densities for Danyu39 and Lianyu16 are 2600-3200 plants per 667m~2 and 2600 plants per 667m~2.
(4) The same suitable density for three hybrids with different plant-types is 2600-3800 plants per 667m~2 in Dalian.The representation of semi-compact hybrid Danyu39 is chosen as the main variety.And suitable density for Danyu39 is 3800 plants per 667m~2.The representation of compact hybrid Zhengdan958 and flat hybrid Lianyu 16 are chosen as the secondary variety.And suitable densities for Zhengdan958 and Lianyu 16 are 3800-4500 plants per 667m~2 and 2200-2600 plants per 667m~2.
(5) The same suitable density for three hybrids with different plant-types is 3200-4500 plants per 667m~2 in Tieling.The representation of compact hybrid Zhengdan958 is chosen as the main variety.And suitable density for Zhengdan958 is 3800-4500 plants per 667m~2.The representation of semi-compact hybrid Danyu39 and flat hybrid Lianyul6 are chosen as the secondary variety.And suitable densities for Danyu39 and Lianyul6 are 3200-3800 plants per 667m~2 and 2600-3800 plants per 667m~2.
Stability analysis of three hybrids with different plant-types in different locations and densities will provide setting methods for provincial regional test.
The suitable densities for three hybrids in the team with the same growth period are 3200 plants per 667m~2 for flat hybrid Lianyu16,3800 plants per 667m~2 for semi-compact hybrid Danyu39 and 4500 plants per 667m~2 for compact hybrid Zhengdan958.In different locations and years,the same suitable densities for three hybrids with different plant-type are 3200 plants per 667m~2,3800 plants per 667m~2 and 4500 plants per 667m~2.Comprehensive performance composed of high yield and high stability of 3800 is the best in three treatments above.
According the results above,in the procedure of new hybrids breeding in Liaoning Province,3800 plants per 667m~2 can be used to evaluate different plant-types and density-tolerance in variety comparative test.In pre-comparative experiment 3800 plants per 667m~2 can be used in primary selection.According to data which are provided by breeder,varieties selected to attend regional test will be devided into three groups,flat,semi-compact and compact,planted in 3200 plants per 667m~2,3800 plants per 667m~2 and 4500 plants per 667m~2.
3 Comparison of yield,nutritional and other agronomic characters illustrates differences among three varieties with different plant-types.
(1)Lianyu16 is a hybrid with flat type,which performs long growth period,more total leaves and less green leaves in maturity.Plant height,ear height and location of ear in the plant(the rate of ear height and plant height) are all high.Lianyu16's ear is the biggest in three hybrids and its ear performs more kernels and heavier 100-kernek weight,In every density treatment Lianyul6 performs less effective ears and total kernels.Its kernel gross fat content is high.Danyu39 is a hybrid with semi-compact type,which performs moderate growth period,moderate total leaves and moderate green leaves in maturity.Plant height,ear height and location of ear in the plant are all moderate.Denyu39's ear is bigger of three hybrids and its ear performs more kernels and heavier 100-kernek weight.In every density treatment Danyul6 performs moderate effective ears and total kernels.Its kernel gross protein content and kernel lysine content are high.Zhengdan958 is a hybrid with compact type,which performs short growth period,moderate total leaves and more green leaves in maturity.Plant height,ear height and location of ear in the plant are all moderate.Zhengdan958's ear is small and its ear performs less kernels and light100-kernek weight.In every density treatment Zhengdan958 performs more effective ears and total kernels.Its kernel gross starch content and kernel bulk density are high.
(2)The research on nutritional characters shows that planting maize hybrids in Shenyang and Tieling is helpful to increase kernel protein content.Chaoyang,Dalian and Dandong is suitable for the produce of maize starch.It is a good choice to plant high oil maize in Chaoyang and Dandong.
In the analysis for results of this research,years and locations are regarded as another two effects.So on the base of split block experiment with two effects,a split block experiment with four effects is performed.This method is used unusually. Doing varieties distribution according to growth period and ecological conditions is traditional method.In this paper combined with the results of this test,new points about maize varieties distribution of Liaoning Province are proposed.Research on hybrids with different plant-types provides references and bases for arrangement of regional test of Liaoning Province.
引文
1 《顾慰连论文选集》编委会.顾慰连论文选集.辽宁科学技术出版社,1992
2 鲍巨松,薛吉全等.不同株型玉米叶面积指数和群体受光态势与产量的关系[J].玉米科学,1993,1(3):50-54.
3 陈国平等.紧凑型玉米生长发育规律的研究.玉米科学,1993,1(3):33-38
4 段巍巍等.密度对玉米光合生理特性和产量的影响.玉米科学,2007,15(2):98-101
5 方继友等.早地春玉米高产技术.作物杂志,1996,(3):3
6 盖均镒主编.试验统计方法.中国农业出版社,2000
7 关义新等.高产春玉米群体库及源库流的综合调控[J].沈阳农业大学学报,2000,31(6):537-540.
8 关义新等.种植密度与施氮水平对高淀粉玉米郑单18淀粉含量的影响[J].玉米科学,2004,12(增刊):101-103.
9 郭庆法等.中国玉米栽培学[M].上海:上海科学技术出版社,2004.
10 胡秉民等.作物稳定性分析法.科学出版社,1993
11 胡昌浩等.我国不同年代玉米品种生育特性演进规律研究Ⅰ.产量性状的演进[J].玉米科学,1998,6(2):44-48.
12 黄智鸿等.超高产玉米品种干物质积累与分配特点的研究.玉米科学,2007,15(3):95-98
13 库丽霞等.环境对玉米杂交种品质性状的影响研究.玉米科学,2006,14(6):23-27
14 兰发盛等.成单13高产栽培综合农艺措施研究.四川农业大学学报,1993(4):598-602
15 李登海.从事紧凑型玉米育种的历史与展望.莱阳农学院学报,2001,18(1):1-6
16 李少昆等.玉米株型研究综述.玉米科学,1995,3(4):4-8
17 李新政等.夏玉米高产技术开发研究.作物杂志,1992,(3):24-25
18 李玉珍等.玉米高产的十项改进技术.河南农业科学,1996,(3):38-39
19 李哲等.风沙半干早地区玉米增产技术研究.辽宁农业科学,1991,(6):1-4
20 李自学主编.农作物田间试验实用手册.中国农业科学技术出版社,2007
21 刘德金等.农业试验设计与分析.中国农业科学技术出版社,2005
22 刘俊明等.玉米增产潜力及控制技术研究.作物杂志,1995,(6):4-6
23 刘绍棣等.掖县夏玉米创高产的综合配套技术.作物杂志,1988,(1)
24 刘淑云等.玉米产量和品质与生态环境的关系[J].作物学报,2005,31(5):571-576.
25 柳家友.玉米叶向值、叶片面积与产量关系的研究初探[J].河南农业科学,1994(5):4-6.
26 柳家友等.玉米杂交种主要穗部性状之演变及对育种目标的影响[J].玉米科学,2004;12(专刊):3-4.
26 陆卫平等.不同生态条件玉米产量源库关系的研究[J].作物学报,1997,23(6):727-731.
27 路海东等.玉米高产栽培群体密度与性状指标研究.玉米科学,2006,14(s):111-114
28 吕丽华等.密度对夏玉米品种光和特性和产量性状的影响.玉米科学,2007,15(2):79-81
29 马兴林等.不同类型玉米产量及籽粒营养组分含量的种植密度效应.玉米科学,2007,15(6):63-70
30 马兴林等.种植密度对3个玉米杂交种产量及品质的影响.玉米科学,2005,13(3):84-86
31 孟鸿道等.夏玉米掖单12高产栽培技术.作物杂志,1993,(3):19-20
32 穆培源等.作物稳定性分析方法的研究进展.新疆农业科学,2003,40(3):142-144
33 牛玉贞等.沂蒙山区夏玉米栽培优化方案的探讨.山东农业科学,1988(3)
34 农业部种植管理司组编.中国玉米品质区划及产业布局.中国农业出版社,2004
35 彭应国等.万亩玉米综合配套高产模式栽培总结.耕作与栽培,1989,(6):28-31
36 全国农业技术推广中心编.中国玉米品种科技论坛.中国农业科学技术出版社,2007
37 饶春富,王友德.春玉米大面积亩产吨粮的产量构成因素浅析[J].玉米科学.1993,1(1):13-16.
38 史新海等.高产玉米杂交种主要农艺性状演变规律研究.作物学报,1996,(6):750-756
39 史新海等.山东省不同年代玉米杂交种主要农艺性状演变规律的研究[J].玉米科学,2000,8(2):33-35.
40 孙立军等.大麦蛋白质遗传稳定性分析.大麦科学,2002(3):8-13
41 孙月轩等.夏玉米高产栽培途径与促控技术.玉米科学,1995,(4):48-52
42 孙政才等.玉米栽培研究50年--陈国平先生文集.中国农业科技出版社,2005:207-213
43 孙政才等.玉米栽培研究50年--陈国平先生文集.中国农业科技出版社,2005:81-86
44 佟屏亚,程延年.不同株型玉米叶面积消长动态的研究[J].北京农业科学,1994,12(6):1-4.
45 佟屏亚.中国玉米生产的发展方向.农业科技通讯,2005(8):11-13
46 佟屏亚.中国玉米种植区划.中国农业出版社,1992
47 王 璞等.密度对高油玉米298产量和含油率的影响[J].玉米科学,2002,10(2):49-52.
48 王聪玲等.不同类型夏玉米主要性状及产量的分析.玉米科学,2008,16(2):39-43
49 王庆成,牛玉贞等.株型对玉米群体光合速率和产量影响[J].作物学报,1996,22(6):223-227.
50 王庆成等.密度对玉米库性能与产量潜力的影响[J].华北农学报,1998,13:34-40.
51 王庆成等.玉米新杂交种产量-密度方程与耐密性研究[J].山东农业科学,1998,(6):7-11.
52 王振华等.河南夏玉米再高产关键技术.河南农业科学,1995,(5):
53 王忠孝.山东玉米[M].山东省农业科学院.1999
54 韦瑞良等.杂交玉米高产栽培技术模型探讨.广西农业科学,1994,(5):195-198
55 温振民等.用高稳系数法估算玉米杂交种高产稳产性的探讨.作物学报,1994,20(4)
56 谢瑞芝等.超高产夏玉米生长机制研究[J].河南农业大学学报.1999,33(1):11-16.
57 星耀武等.不同株型玉米杂交种的产量及农艺性状的研究.玉米科学,2005,13(4):92-94
58 许崇香等.密度对中早熟高淀粉玉米品种淀粉产量的影响[J].玉米科学,2005,13(2):97-98,101.
59 许乃银等.棉花区域试验中品种稳定性分析探讨.江西棉花,2004,26(4):9-13
60 薛吉全,鲍巨松等.玉米不同株型群体冠层特性与光能截获量及产量的关[J].西北农业学报,1995,4(1):29-34.
61 杨耿斌等.不同密度对青贮玉米产量与品质的影响.玉米科学,2006,14(5):115-117
62 杨国虎等.种植密度影响玉米产量及部分产量相关性状的研究.西北农业学报,2006,15(5):57-60,64
63 尹枝瑞.种植密度对玉米产量及生长发育的影响[J].吉林农业科学,1997,5(1):1-5
64 于鸿飞等.玉米理想株型育种生理生态研究概况.玉米科学,1995,3(1):12-17
65 张吉旺等.种植密度对全株玉米饲用营养价值的影响.中国农业科学.2005,38(6):1126-1131
66 张世煌,孙世贤.从品种试验看玉米育种面临的技术问题[J].作物杂志,2006(2):10-12.
67 张新等.郑单21不同密度与产量及构成因素关系的研究.玉米科学,2005,13(1):106-107
68 张修亭等.夏玉米高产栽培技术模式研究.玉米科学,1995,(3):31-35
69 张玉勤等.夏玉米高产栽培模式化技术.耕作与栽培,1990,(5):29-31
70 张泽民等.不同年代玉米杂交种干物质积累与分配规律的研究[J].河南农业大学学报,1997,31(2):118-122.
71 章家恩.作物群体结构的生态环境效应及其优化探讨[J].生态科学,2000,19(1):30-35.
72 赵明.玉米群体光合模拟的研究[D].博士学位论文,北京:北京农业大学,1991.
73 赵久然等.超级玉米及良种良法配套技术.作物学报,2005(3)
74 周玉芝等.河北省夏播玉米品种主要农艺性状演变规律的研究[J].河北农业大学学报,2005,28(2):1-4.
75 左晓龙等.皖玉4号高产栽培技术.安徽农业科学,1995,(3):255-256
76 Ahmadi M,Wiebold WJ,Beuerlein J E,et al.Agronomic practices that affect corn kernel characteristics[J].Agron.J.,1993(85):615- 619.American Seed Trade Association,1982.
77 Betran F J,Ribaut J M,Beck D,et al.Genetic diversity,specific combining ability,and heterosis intropical maize under stress and non-stress environments[J].Crop Science,2003,43:797- 806
78 Carlone MR,Russell W A.Response to plant densities and nitrogen levels for four maize cultivars from different eras of breeding[J].Crop Science,1987,27:5- 7.
79 CastleberryR M,CrumCW,Krull CF.Genetic yield improvement of U.S.maize cultivars under varying fertility and climatic environments[J].Crop Science,1984,24:33- 36.
80 Crosbie T M.Changes in physiological traits associated with long term breeding efforts toim prove gram yield of maize[A].Loden H D,D.Wiikinson(eds).Proceedings of 37th Annual Corn &Sorghum Research Conference,5- 9 Dec.,[C].Washington,DC,Chicago,IL.,
81 Cunha Fernandes J S,Franzon J F.Thirty years of genetic progress in maize(Zea mays L.)in a tropical environment[J].Maydica,1997,42:21- 27.
82 Derieux M,Darrigrand M,Gallais A,et al.Estimation du progress genttique r(?)alis(?)chez le maize gram en France entre 1950 et 1985[J].Agronomic,1987,7:1-11.
83 Dillehay B L,Roth G W,Calvin D D,et al.Performance of Bt corn hybrids,their near Isolines,and leadingcorn hybrids in Pennsylvania and Maryland[J].Agron.J.,2004,96:818- 824.
84 Dodd J.Howto foresee corn disease outbreaks[A].55th Annual Corn & Sorghum Industry Research Conference,December 6- 8,2000[C].
85 Duvick D N,Smith J S C,Cooper M.Long- term selection in a commercial hybrid maize breedingprogram[A].J.Janick(ed).Plant Breeding Reviews.Long Term Selection:Crops,Animals,and Bacteria[C].NewYork,John Wiley&Sons,2004.
86 Duvick D N.Genetic contribution to yield gains of U.S.hybrid maize,1930 to1980[A].W.R.Fehr(ED).Genetic eontribution toyield gains offive major crop plants[C].Madison,WI,USA:CSSASpecial Publication No.7.Crop Science Society of America,American Society of Agronomy,1984.
87 Duvick D N.Genetic contributions to advances in yield of U.S.Maize[J].Maydica 1992,37:69- 79.
88 Duvick D N.Genetic diversity in major farm crops on the farm and in reserve[J].Econ.Bot.,1984,38:161- 178.
89 Duvick D N.Genetic rates of gain in hybrid maize yields during the past 40 years[J].Maydica,1977,ⅩⅩⅡ:187- 196.
90 Duvick D N.The contribution of breeding to yield advances in maize(Zea mays L.)[A].Sparks D N,(ed.) Adv.Agron.[C].San Diego,CA.Academic Press,2005.
91 Duvick DN,Smith J SC,Cooper M.Changes in performance,parentage,and genetic diversity of successful corn hybrids,from 1930 to 2000[A].Smith C W,Betran J,Runge E(eds).Corn:Origin,History,Technology and Production[C].New York:John Wiley & Sons,Inc.,2004.
92 Duvick DN.What is yield[A].Edmeades GO,Banziger M,Mickelson H R,and Pena-Valdivia C B(eds).Developing droughtand low Nolerant Maize:Proceedings of a Symposium[C].El Bat(?)n,Mexico:CIMMYT,1997.
93 Edmeades G O,Banziger MM,Cortes C.From stress- tolerant populations tohybrids:The role of source germplasm[A].Edmeades G O,Banziger M,Mickelson H R,Pena- Valdiva C B (eds).Developing droughtand lowN- tolerant Maize:Proceedings of a Symposium[C].El Bat(?)n,Mexico:CIMMYT,1997.
94 Eyh(?)rabide G H,Damilano A L,Colazo J C.Genetic gain for gram yield ofmaize in Argentina[J].Maydica,1994,39:207- 211.
95 Eyht(?)rabide G H,Damilano A L.Comparison of genetic gain for grain yield of maize between the 1980s and 1990s in Argentina[J].Maydica,2001,46:277- 281.
97 Frei OM.Changes in yield physiologyofcorn as a result of breedingin northern European[J].Maydica,2000,45:173- 183.
98 Genter C F,Eheart J F,Linkous W N.Effects of location,hybrids,fertilizer,and rate of plantingon the oil and protein contents of corn gram[J].Agron.J.,1956(48):63- 67.
99 GianessiLP,CarpenterJE.Agricultural Biotechnology[A].Insect ControlBenefits[C].Washington,DC,National Center for Food and Agricultural Policy,1999.
100 Karlen D L,FlanneryR L,Sadler E J.Dry matter nitrogen,phosphotus and potassium accumulation Rate by corn on Norfolk loamy Sand[J].Agron.J.,1987,79:649- 656.
101 Lucas Borr(?)s,Maf(?)a E,Otegui.Maize kernel weight response to post- floweringsourcesink ratio[J].Crop Sci.,2001(49):1816- 1822.
102 Lvanovic M,Kojic L.Grain yield ofmaize hybrids in different periods of breeding[J].Informtsiormyi Byulleten POKukuruze,1990,88:93- 101.
103 Meghji MR,Dudley J W,Lambert R J,et al.Inbreeding depression,inbred and hybrid grain yields,and other traits of maize genotypes representingthree eras[J].Crop Science,1984,24:545- 549.
104 RiceME.Perceptionand performance of Bt corn[A].Proceeding soft the 52nd Annual Corn & Sorghum Research Conference[C].Washington,D.C.:American Seed Trade Association,1997.
105 Russell W A.Achievements of maize breeders in North America[A].Baenziger P S(ed).International Crop Science I[C].Madison,WI:Crop Science SocietyofAmerica,Inc.,1993.
106 Russell W A.Agronomic performance of maize cultivars representing different eras of breeding[J].Maydica,1984:375- 390.
107 Russell W A.Comparative performance for maize hybrids representing different eras of maize breeding[A].29th Ann.Corn and Sorghum Res.Conf[C].Chicago,Illinois,American Seed Trade Association,1974.
108 Russell WA.Evaluations for plant,ear,and grain traits of maize cultivars representing seven eras of breeding[J].Maydica,1985.85- 96.
109 Russell WA.Genetic improvement of maize yields[A].Adv.Agron.46.Academic Press,Inc[C].1991.
110 Scarsbrook C.E,Doss B D.Howplant populations and row widths affect light penetration,yield,and plant characteristics of irrigated corn [A].Alabama Agricultural Experiment Station,Auburn University,1973.
111 Schoper J B,Johnson R R,Lamber R J.Maize yield reponse to increased assimilate supply [J],Crop Sci.,1982,22:1184- 1189.
112 Stickler F C.Row width and plant population studies with corn [J].Agron.J.,1964(56):438-441.
113 Stringfiend GH,Corn culture;G.F.Springueoed Corn improvement Agronomy 1956,5:343～378
114 Tollenaar M,Daynard T B.Effdct of Source- sink rayion on dry matter accumulation and leaf senesece of maize[J].Plant Sci.,1982,62:855-860.
115 Tollenaar M,Daynard TB.Relationship between assimilate soure and reproductive sink in maize grown in a short- season environment[J].Agron J.,1978,70:219- 222.
116 Tollenaar M,Lee E A.Yield potential,yield stabilityand stress tolerance in maize[J].Field Crops Research,2002,75:161-169.
117 Zuber MS,Smith G E,Gehrke C W.Crude protein of corn grain andstover as influenced by different hybrids,plant populations,and nitrogen levels [J].Agron.J.,1954(46):257- 261.
2 鲍巨松,薛吉全等.不同株型玉米叶面积指数和群体受光态势与产量的关系[J].玉米科学,1993,1(3):50-54.
3 陈国平等.紧凑型玉米生长发育规律的研究.玉米科学,1993,1(3):33-38
4 段巍巍等.密度对玉米光合生理特性和产量的影响.玉米科学,2007,15(2):98-101
5 方继友等.早地春玉米高产技术.作物杂志,1996,(3):3
6 盖均镒主编.试验统计方法.中国农业出版社,2000
7 关义新等.高产春玉米群体库及源库流的综合调控[J].沈阳农业大学学报,2000,31(6):537-540.
8 关义新等.种植密度与施氮水平对高淀粉玉米郑单18淀粉含量的影响[J].玉米科学,2004,12(增刊):101-103.
9 郭庆法等.中国玉米栽培学[M].上海:上海科学技术出版社,2004.
10 胡秉民等.作物稳定性分析法.科学出版社,1993
11 胡昌浩等.我国不同年代玉米品种生育特性演进规律研究Ⅰ.产量性状的演进[J].玉米科学,1998,6(2):44-48.
12 黄智鸿等.超高产玉米品种干物质积累与分配特点的研究.玉米科学,2007,15(3):95-98
13 库丽霞等.环境对玉米杂交种品质性状的影响研究.玉米科学,2006,14(6):23-27
14 兰发盛等.成单13高产栽培综合农艺措施研究.四川农业大学学报,1993(4):598-602
15 李登海.从事紧凑型玉米育种的历史与展望.莱阳农学院学报,2001,18(1):1-6
16 李少昆等.玉米株型研究综述.玉米科学,1995,3(4):4-8
17 李新政等.夏玉米高产技术开发研究.作物杂志,1992,(3):24-25
18 李玉珍等.玉米高产的十项改进技术.河南农业科学,1996,(3):38-39
19 李哲等.风沙半干早地区玉米增产技术研究.辽宁农业科学,1991,(6):1-4
20 李自学主编.农作物田间试验实用手册.中国农业科学技术出版社,2007
21 刘德金等.农业试验设计与分析.中国农业科学技术出版社,2005
22 刘俊明等.玉米增产潜力及控制技术研究.作物杂志,1995,(6):4-6
23 刘绍棣等.掖县夏玉米创高产的综合配套技术.作物杂志,1988,(1)
24 刘淑云等.玉米产量和品质与生态环境的关系[J].作物学报,2005,31(5):571-576.
25 柳家友.玉米叶向值、叶片面积与产量关系的研究初探[J].河南农业科学,1994(5):4-6.
26 柳家友等.玉米杂交种主要穗部性状之演变及对育种目标的影响[J].玉米科学,2004;12(专刊):3-4.
26 陆卫平等.不同生态条件玉米产量源库关系的研究[J].作物学报,1997,23(6):727-731.
27 路海东等.玉米高产栽培群体密度与性状指标研究.玉米科学,2006,14(s):111-114
28 吕丽华等.密度对夏玉米品种光和特性和产量性状的影响.玉米科学,2007,15(2):79-81
29 马兴林等.不同类型玉米产量及籽粒营养组分含量的种植密度效应.玉米科学,2007,15(6):63-70
30 马兴林等.种植密度对3个玉米杂交种产量及品质的影响.玉米科学,2005,13(3):84-86
31 孟鸿道等.夏玉米掖单12高产栽培技术.作物杂志,1993,(3):19-20
32 穆培源等.作物稳定性分析方法的研究进展.新疆农业科学,2003,40(3):142-144
33 牛玉贞等.沂蒙山区夏玉米栽培优化方案的探讨.山东农业科学,1988(3)
34 农业部种植管理司组编.中国玉米品质区划及产业布局.中国农业出版社,2004
35 彭应国等.万亩玉米综合配套高产模式栽培总结.耕作与栽培,1989,(6):28-31
36 全国农业技术推广中心编.中国玉米品种科技论坛.中国农业科学技术出版社,2007
37 饶春富,王友德.春玉米大面积亩产吨粮的产量构成因素浅析[J].玉米科学.1993,1(1):13-16.
38 史新海等.高产玉米杂交种主要农艺性状演变规律研究.作物学报,1996,(6):750-756
39 史新海等.山东省不同年代玉米杂交种主要农艺性状演变规律的研究[J].玉米科学,2000,8(2):33-35.
40 孙立军等.大麦蛋白质遗传稳定性分析.大麦科学,2002(3):8-13
41 孙月轩等.夏玉米高产栽培途径与促控技术.玉米科学,1995,(4):48-52
42 孙政才等.玉米栽培研究50年--陈国平先生文集.中国农业科技出版社,2005:207-213
43 孙政才等.玉米栽培研究50年--陈国平先生文集.中国农业科技出版社,2005:81-86
44 佟屏亚,程延年.不同株型玉米叶面积消长动态的研究[J].北京农业科学,1994,12(6):1-4.
45 佟屏亚.中国玉米生产的发展方向.农业科技通讯,2005(8):11-13
46 佟屏亚.中国玉米种植区划.中国农业出版社,1992
47 王 璞等.密度对高油玉米298产量和含油率的影响[J].玉米科学,2002,10(2):49-52.
48 王聪玲等.不同类型夏玉米主要性状及产量的分析.玉米科学,2008,16(2):39-43
49 王庆成,牛玉贞等.株型对玉米群体光合速率和产量影响[J].作物学报,1996,22(6):223-227.
50 王庆成等.密度对玉米库性能与产量潜力的影响[J].华北农学报,1998,13:34-40.
51 王庆成等.玉米新杂交种产量-密度方程与耐密性研究[J].山东农业科学,1998,(6):7-11.
52 王振华等.河南夏玉米再高产关键技术.河南农业科学,1995,(5):
53 王忠孝.山东玉米[M].山东省农业科学院.1999
54 韦瑞良等.杂交玉米高产栽培技术模型探讨.广西农业科学,1994,(5):195-198
55 温振民等.用高稳系数法估算玉米杂交种高产稳产性的探讨.作物学报,1994,20(4)
56 谢瑞芝等.超高产夏玉米生长机制研究[J].河南农业大学学报.1999,33(1):11-16.
57 星耀武等.不同株型玉米杂交种的产量及农艺性状的研究.玉米科学,2005,13(4):92-94
58 许崇香等.密度对中早熟高淀粉玉米品种淀粉产量的影响[J].玉米科学,2005,13(2):97-98,101.
59 许乃银等.棉花区域试验中品种稳定性分析探讨.江西棉花,2004,26(4):9-13
60 薛吉全,鲍巨松等.玉米不同株型群体冠层特性与光能截获量及产量的关[J].西北农业学报,1995,4(1):29-34.
61 杨耿斌等.不同密度对青贮玉米产量与品质的影响.玉米科学,2006,14(5):115-117
62 杨国虎等.种植密度影响玉米产量及部分产量相关性状的研究.西北农业学报,2006,15(5):57-60,64
63 尹枝瑞.种植密度对玉米产量及生长发育的影响[J].吉林农业科学,1997,5(1):1-5
64 于鸿飞等.玉米理想株型育种生理生态研究概况.玉米科学,1995,3(1):12-17
65 张吉旺等.种植密度对全株玉米饲用营养价值的影响.中国农业科学.2005,38(6):1126-1131
66 张世煌,孙世贤.从品种试验看玉米育种面临的技术问题[J].作物杂志,2006(2):10-12.
67 张新等.郑单21不同密度与产量及构成因素关系的研究.玉米科学,2005,13(1):106-107
68 张修亭等.夏玉米高产栽培技术模式研究.玉米科学,1995,(3):31-35
69 张玉勤等.夏玉米高产栽培模式化技术.耕作与栽培,1990,(5):29-31
70 张泽民等.不同年代玉米杂交种干物质积累与分配规律的研究[J].河南农业大学学报,1997,31(2):118-122.
71 章家恩.作物群体结构的生态环境效应及其优化探讨[J].生态科学,2000,19(1):30-35.
72 赵明.玉米群体光合模拟的研究[D].博士学位论文,北京:北京农业大学,1991.
73 赵久然等.超级玉米及良种良法配套技术.作物学报,2005(3)
74 周玉芝等.河北省夏播玉米品种主要农艺性状演变规律的研究[J].河北农业大学学报,2005,28(2):1-4.
75 左晓龙等.皖玉4号高产栽培技术.安徽农业科学,1995,(3):255-256
76 Ahmadi M,Wiebold WJ,Beuerlein J E,et al.Agronomic practices that affect corn kernel characteristics[J].Agron.J.,1993(85):615- 619.American Seed Trade Association,1982.
77 Betran F J,Ribaut J M,Beck D,et al.Genetic diversity,specific combining ability,and heterosis intropical maize under stress and non-stress environments[J].Crop Science,2003,43:797- 806
78 Carlone MR,Russell W A.Response to plant densities and nitrogen levels for four maize cultivars from different eras of breeding[J].Crop Science,1987,27:5- 7.
79 CastleberryR M,CrumCW,Krull CF.Genetic yield improvement of U.S.maize cultivars under varying fertility and climatic environments[J].Crop Science,1984,24:33- 36.
80 Crosbie T M.Changes in physiological traits associated with long term breeding efforts toim prove gram yield of maize[A].Loden H D,D.Wiikinson(eds).Proceedings of 37th Annual Corn &Sorghum Research Conference,5- 9 Dec.,[C].Washington,DC,Chicago,IL.,
81 Cunha Fernandes J S,Franzon J F.Thirty years of genetic progress in maize(Zea mays L.)in a tropical environment[J].Maydica,1997,42:21- 27.
82 Derieux M,Darrigrand M,Gallais A,et al.Estimation du progress genttique r(?)alis(?)chez le maize gram en France entre 1950 et 1985[J].Agronomic,1987,7:1-11.
83 Dillehay B L,Roth G W,Calvin D D,et al.Performance of Bt corn hybrids,their near Isolines,and leadingcorn hybrids in Pennsylvania and Maryland[J].Agron.J.,2004,96:818- 824.
84 Dodd J.Howto foresee corn disease outbreaks[A].55th Annual Corn & Sorghum Industry Research Conference,December 6- 8,2000[C].
85 Duvick D N,Smith J S C,Cooper M.Long- term selection in a commercial hybrid maize breedingprogram[A].J.Janick(ed).Plant Breeding Reviews.Long Term Selection:Crops,Animals,and Bacteria[C].NewYork,John Wiley&Sons,2004.
86 Duvick D N.Genetic contribution to yield gains of U.S.hybrid maize,1930 to1980[A].W.R.Fehr(ED).Genetic eontribution toyield gains offive major crop plants[C].Madison,WI,USA:CSSASpecial Publication No.7.Crop Science Society of America,American Society of Agronomy,1984.
87 Duvick D N.Genetic contributions to advances in yield of U.S.Maize[J].Maydica 1992,37:69- 79.
88 Duvick D N.Genetic diversity in major farm crops on the farm and in reserve[J].Econ.Bot.,1984,38:161- 178.
89 Duvick D N.Genetic rates of gain in hybrid maize yields during the past 40 years[J].Maydica,1977,ⅩⅩⅡ:187- 196.
90 Duvick D N.The contribution of breeding to yield advances in maize(Zea mays L.)[A].Sparks D N,(ed.) Adv.Agron.[C].San Diego,CA.Academic Press,2005.
91 Duvick DN,Smith J SC,Cooper M.Changes in performance,parentage,and genetic diversity of successful corn hybrids,from 1930 to 2000[A].Smith C W,Betran J,Runge E(eds).Corn:Origin,History,Technology and Production[C].New York:John Wiley & Sons,Inc.,2004.
92 Duvick DN.What is yield[A].Edmeades GO,Banziger M,Mickelson H R,and Pena-Valdivia C B(eds).Developing droughtand low Nolerant Maize:Proceedings of a Symposium[C].El Bat(?)n,Mexico:CIMMYT,1997.
93 Edmeades G O,Banziger MM,Cortes C.From stress- tolerant populations tohybrids:The role of source germplasm[A].Edmeades G O,Banziger M,Mickelson H R,Pena- Valdiva C B (eds).Developing droughtand lowN- tolerant Maize:Proceedings of a Symposium[C].El Bat(?)n,Mexico:CIMMYT,1997.
94 Eyh(?)rabide G H,Damilano A L,Colazo J C.Genetic gain for gram yield ofmaize in Argentina[J].Maydica,1994,39:207- 211.
95 Eyht(?)rabide G H,Damilano A L.Comparison of genetic gain for grain yield of maize between the 1980s and 1990s in Argentina[J].Maydica,2001,46:277- 281.
97 Frei OM.Changes in yield physiologyofcorn as a result of breedingin northern European[J].Maydica,2000,45:173- 183.
98 Genter C F,Eheart J F,Linkous W N.Effects of location,hybrids,fertilizer,and rate of plantingon the oil and protein contents of corn gram[J].Agron.J.,1956(48):63- 67.
99 GianessiLP,CarpenterJE.Agricultural Biotechnology[A].Insect ControlBenefits[C].Washington,DC,National Center for Food and Agricultural Policy,1999.
100 Karlen D L,FlanneryR L,Sadler E J.Dry matter nitrogen,phosphotus and potassium accumulation Rate by corn on Norfolk loamy Sand[J].Agron.J.,1987,79:649- 656.
101 Lucas Borr(?)s,Maf(?)a E,Otegui.Maize kernel weight response to post- floweringsourcesink ratio[J].Crop Sci.,2001(49):1816- 1822.
102 Lvanovic M,Kojic L.Grain yield ofmaize hybrids in different periods of breeding[J].Informtsiormyi Byulleten POKukuruze,1990,88:93- 101.
103 Meghji MR,Dudley J W,Lambert R J,et al.Inbreeding depression,inbred and hybrid grain yields,and other traits of maize genotypes representingthree eras[J].Crop Science,1984,24:545- 549.
104 RiceME.Perceptionand performance of Bt corn[A].Proceeding soft the 52nd Annual Corn & Sorghum Research Conference[C].Washington,D.C.:American Seed Trade Association,1997.
105 Russell W A.Achievements of maize breeders in North America[A].Baenziger P S(ed).International Crop Science I[C].Madison,WI:Crop Science SocietyofAmerica,Inc.,1993.
106 Russell W A.Agronomic performance of maize cultivars representing different eras of breeding[J].Maydica,1984:375- 390.
107 Russell W A.Comparative performance for maize hybrids representing different eras of maize breeding[A].29th Ann.Corn and Sorghum Res.Conf[C].Chicago,Illinois,American Seed Trade Association,1974.
108 Russell WA.Evaluations for plant,ear,and grain traits of maize cultivars representing seven eras of breeding[J].Maydica,1985.85- 96.
109 Russell WA.Genetic improvement of maize yields[A].Adv.Agron.46.Academic Press,Inc[C].1991.
110 Scarsbrook C.E,Doss B D.Howplant populations and row widths affect light penetration,yield,and plant characteristics of irrigated corn [A].Alabama Agricultural Experiment Station,Auburn University,1973.
111 Schoper J B,Johnson R R,Lamber R J.Maize yield reponse to increased assimilate supply [J],Crop Sci.,1982,22:1184- 1189.
112 Stickler F C.Row width and plant population studies with corn [J].Agron.J.,1964(56):438-441.
113 Stringfiend GH,Corn culture;G.F.Springueoed Corn improvement Agronomy 1956,5:343～378
114 Tollenaar M,Daynard T B.Effdct of Source- sink rayion on dry matter accumulation and leaf senesece of maize[J].Plant Sci.,1982,62:855-860.
115 Tollenaar M,Daynard TB.Relationship between assimilate soure and reproductive sink in maize grown in a short- season environment[J].Agron J.,1978,70:219- 222.
116 Tollenaar M,Lee E A.Yield potential,yield stabilityand stress tolerance in maize[J].Field Crops Research,2002,75:161-169.
117 Zuber MS,Smith G E,Gehrke C W.Crude protein of corn grain andstover as influenced by different hybrids,plant populations,and nitrogen levels [J].Agron.J.,1954(46):257- 261.