摘要
[目的]本文探讨了采用JB-2型精量点播耧播种配合培土铲中耕,对旱坪地保水固土及玉米产量的影响,为其它作物利用机械种植提供依据。[方法]采用与传统耕作模式田间栽培对比试验的方法,以玉米根系长度和重量、秸秆长度和重量、玉米产量、生物干重为对比分析指标,分析处理与对照之间的差异。[结果]田间试验结果表明,在黄土高原的旱坪地,与对照相比,采用这种农机组合种植玉米,可使单株平均气根长度增加342.94cm,增加一倍;单株根系干重增加13.21g,增幅33.50%;单株产量增加0.017kg,增幅7.62%;每公顷产量增加462.0kg,增幅7.62%;每公顷生物总干重增加631.7kg,增幅4.73%。[结论]JB-2型精量点播耧与培土铲配套播种、中耕可明显增高地垅,提高土壤含水量,促进玉米根系发育,增强植株固土能力,并提高玉米单产。
[Objective]The paper explored the effect of sowing seeds with precision sowing drill(JB-2)combining interfiling with a ridged sweep on water &soil conservation and corn yield of dry land,so as to provide basis for mechanical planting of other crops.[Methods]In this research,corn seeds were sowed with precision sowing drill(JB-2)while intertillage with a ridged sweep was carried out at the same time.Then length and weight of corn root and stalk,corn yield and dry yield were determined respectively,and the results were compared with traditional tillage.[Results]Field test showed that compared with traditional tillage,the combination of precision sowing drill(JB-2)and ridged sweep resulted in increases of average length of aerial roots per plant(342.94 cm more than the CK),dry weight of roots per plant(13.21 g,i.e.33.50% more than the CK),yield of per plant(0.244 kg,i.e.7.31% more than the CK),yield of hm~2' land(444.15 kg,i.e.13.26% more than the CK)and total biological dry weight per hm~2'land(631.5kg,i.e.8.59%).[Conclusion]Sowing seeds with precision sowing drill(JB-2)combining intertilling with a ridged sweep could obviously raise the height of ridges,increase soil moisture,promote root development,enhance soil fixation ability of the plant and improve the yield of land per hm~2.
引文
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