有机培肥对渭北旱塬农田土壤环境及冬小麦生长的影响
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摘要
为了探明有机培肥对旱地土壤环境及作物生长的的作用机理,建立与完善适宜的旱区土壤扩蓄增容技术体系,本研究通过在渭北旱塬设置不同秸秆还田和施用有机肥梯度,研究了有机培肥对冬小麦各生育时期的土壤水分、土壤理化性状、冬小麦产量及水分利用效率的影响,主要研究结果如下:
     1.有机培肥处理能较好地改善土壤水分状况,显著提高收获后0-200cm土层土壤贮水量,起到良好的蓄水保墒的作用。2011年小麦收获后,秸秆还田处理与施用有机肥处理0-200cm土层土壤平均含水量在三个主要生育期(拔节期、灌浆期、收获后)变化规律基本一致,各处理0-120cm土层土壤平均含水量与对照相比,均有所增加,且增幅基本与秸秆还田量和有机肥施用量呈正相关。。
     2.秸秆还田处理和施用有机肥处理0-60cm各土层土壤容重均低于对照,秸秆还田处理降幅为1.3%~4.0%,施用有机肥处理为3.1%~6.0%,各培肥处理与对照及处理间差异均未达到显著水平。土壤容重随秸秆还田量和有机肥施用量的增加而减少,与秸秆还田相比,施用有机肥更有利于土壤容重的降低。有机培肥处理能够改善土壤团聚体数量和大小状况,从而提高土壤机械稳定性和水稳性团聚体结构水平,两种团聚体0-40cm各土层秸秆还田和有机肥处理>0.25mm的土壤团聚体含量、平均重量直径、几何均重直径均较对照有所提升,且随土层加深逐渐增大,各个土层总体变化趋势基本表现为S_H>S_M>S_L,M_H>M_M>M_L,秸秆还田处理效果略优于施用有机肥处理。
     3.有机培肥处理对不同土壤养分含量的影响存在差异。有机培肥能显著提高土壤有机质、碱解氮、速效磷及速效钾含量,各处理0-60cm土层土壤有机质及三种速效养分含量均高于对照,变化规律基本相同,为:S_H>S_M>S_L>CK,M_H>M_M>M_L>CK。对土壤有机质的改善作用,秸秆还田处理0-60cm土层平均含量较对照增幅为5.8%~20.2%,施用有机肥处理增幅为4.6%~13.8%;对于不同土层土壤速效磷含量的影响,S_H、M_H两处理0-60cm土层平均含量较对照显著增加69.6%、130.3%,施用有机肥处理优势更显著;对土壤碱解氮及速效钾含量的影响,秸秆还田处理与施用有机肥效果差异不明显,培肥处理两种养分0-60cm土层平均含量较对照增幅依次为5.9%~28.0%、6.8%~31.1%;有机培肥处理对土壤全效养分(全氮、全磷、全钾)的影响力不甚显著,两种培肥处理对于0-20cm全效养分的影响相对明显,与对照相比三种养分增幅依次为3.9%~33.3%、5.9%~28.0%、6.6%~20.4%,随着土层的加深,各培肥处理较CK处理提高的幅度逐渐减小。
     4.有机培肥对0-60cm土层土壤脲酶、蔗糖酶及磷酸酶活性有明显的增强作用。从各个土层三种酶活性的变化情况看,各培肥处理酶活性值均高于对照,随着土层加深活性逐渐降低,不同处理酶活性随秸秆还田量和有机肥施用量的增加而提高。秸秆还田处理0-60cm土层土壤磷酸酶活性较对照增幅为21.2%~41.8%,施用有机肥的增强效果稍明显一些,增幅为21.4%~48.1%;对土壤脲酶和蔗糖酶活性的影响,两种培肥处理的作用无明显差异,各处理0-60cm土层脲酶活性较对照提高幅度为16.8%~46.6%,蔗糖酶提高幅度为34.4%~98.4%。两种有机培肥处理0-60cm各土层土壤过氧化氢酶活性均略高于对照,但差异不显著,且其活性基本与秸秆还田量及有机肥施用量呈正相关,但随土层变化幅度不大,说明有机培肥措施对增强土壤过氧化氢酶活性方面效果不明显。
     5.有机培肥对冬小麦旗叶叶面积有明显的提高作用,在抽穗期和灌浆期秸秆还田处理大小顺序为S_H> S_M>S_L>CK,各还田处理较CK平均增幅达15.7%,施用有机肥处理为M_M> M_H>M_L>CK,较CK处理平均增幅达15.3%。
     6.有机培肥措施不但有利于冬小麦生长发育及干物质积累,对冬小麦的产量增加也有显著效果。2011年收获后不同有机培肥处理冬小麦产量趋势表现为S_H>S_M>S_L、M_M>M_H>M_L,高量与中量秸秆还田(S_H、S_M)和施用有机肥(M_M、M_H)处理冬小麦产量显著高于对照,增幅依次为25.3%、16.9%(P<0.05),20.0%、21.8%(P<0.05)。各培肥处理冬小麦水分利用效率变化规律与产量变化规律一致,S_H、S_M、M_H、M_M处理显著高于对照,增幅分别为30.5%、19.7%、27.7%、24.6%(P<0.05)。
A field experiment was conducted to determine the effects of organic fertilization on aridsoil environment and mechanism of crop growth under differently organic fertilizer supplies.In order to provide and perfect the basic theoretical to establish and the soil ameliorationtechniques system for arid areas of Weibei Loess plateau of Shaanxi. We studies the effects ofdifferent manure and wheat straw returning treatments, taking no organic fertilization as thecontrol, on soil moisture of each winter wheat growth periods, soil physical and chemicalproperties, crop yield and water use efficiency (WUE). The main results are as follows:
     1. The fertility treatment can better to improve the soil moisture conditions, play a goodeffect in moisture conservation.After the wheat harvest in2011, the average soil content andincrease soil water storage in0-200cm layer at harvesting stage significantly,(depth0-200cm)of manure and wheat straw returning treatments have the same change law in three maingrowth period of winter wheat (Jointing, Filling and Harvesting), compared with CK, theaverage soil content (depth0-120cm) of organic fertilizer treatments are all increase, and theamplitude was positively correlated with the application rate of manure and wheat straw.
     2. After the wheat harvest in2011, the soil bulk (depth0-60cm) of manure and wheatstraw returning treatments are lower than CK, the straw treatments decline1.3%~4.0%, andthe manure decline3.1%~6.0%, no significant between treatments. The soil bulk is reducedwith rate of fertilizer increase, and the manure is better than straw returning treatments. Thefertility treatment can better to improve the number and size of soil aggregates, therebyenhancing the structure level of mechanical stability and water stability aggregates structurelevel. The two aggregates in0-40cm soil layer, the straw returning and manure treatments allhigher than CK in soil aggregates content, MWD and GMD, and gradually increases withdepth, the variation trend is: S_H>S_M>S_L, M_H>M_M>M_L, and the straw returning is better than manure treatment.
     3. Fertility treatment differences in the impact of different soil nutrient content. Usingorganic fertilizers improved the amount of organic matter, and available nutrient(N,P and K).In the0-60cm layer, content of organic matter, and available nutrient(N,P and K) were higherthan that in the control, and the order is: S_H>S_M>S_L>CK, M_H>M_M>M_L>CK. For organicmatter in0-60cm layer, the straw returning treatments were5.8%~20.2%, the manuretreatments were4.6%~13.8%higher than CK, and the straw effect is slightly better thanmanure treatments; The content of available P in0-60cm only SHand M_Hwere16.91%and9.16%significantly higher than CK, and the manure is better; The straw and manuretreatments have the similar effect in of available N in0-60cm, were5.9%~28.0%and6.8%~31.1%higher than CK. The influence of organic fertility treatment effect on soil totalnutrients (TN, TP, TK) is not marked, only0-20cm is obvious, compared with CK, theincrease followed by3.9%~33.3%,5.9%~28.0%and6.6%~20.4%, and with thedeepening of soil layer, the increase is gradually reduce.
     4. The fertility treatment can better to improve the soil Urease, Invertase andPhosphatase of0-60cm soil layer. Using organic fertilizers were more than that in the control,with the deepening of soil layer,the increase is gradually reduce,and the enzyme activityincreased with the increase in the amount of straw or manure.For the Phosphatase in0-60cm,the straw returning treatments were5.8%~20.2%and the manure treatments were4.6%~13.8%higher than CK; For the Urease and Invertase in0-60cm, the straw returning andmanure treatments have the similar effect, and the Urease of each treatments4.6%~13.8%higher than CK, and the Invertase increased34.4%~98.4%; The two kind of fertilitytreatment were slightly higher than CK of soil Catalase in0-60cm soil layer, but notsignificantly. The Catalase activity have positive correlation with the amount of strawreturning or manure application, but little change with soil depth, The fertility treatment cannot better to improve the soil Catalase activity.
     5. Organic fertilizer can improve the flag leaf area of winter wheat significantly,the orderof straw returning treatments at heading stage and filling stage is SH>SM>SL>CK, comparedwith the CK, all straw returning treatments have an average increase of15.7%, the order ofmanure treatments is M_M>M_H>M_L>CK, all manure treatments are15.3%higher than the CK. 6. Not only the growth and dry matter accumulation of winter wheat under continuousapplication of organic fertilizer can promote significantly, but the yield also had a significantincrease. After2011harvest, for the yield of winter wheat, the order of different fertilizerapplication treatments is: S_H>S_M>S_L, M_M>M_H>M_L, S_H, S_M and S_H, SMwere significantlyhigher than CK, the increase followed by25.3%,16.9%(P<0.05),20.0%、21.8%(P<0.05).WUEYhas the similar law with yield, SH, SMand SH, SMwere significantly higher than CK,the increase followed by30.5%,19.7%,27.7%and24.6%(P<0.05).
引文
安婷婷,汪景宽,李双异,于树,朱平.2008.施用有机肥对黑土团聚体有机碳的影响.应用生态学报,9(2):369~373
    白成云,刘金城.1999.有机肥养分在农田中的生态效应分析.山西农业科学,27(2):33~36.
    蔡晓布,钱成,张永青,薛会英,陈芝兰,普琼.2003.秸秆还田对西藏中部退化土壤环境的影响.植物营养与肥料学报,9(4):411~415
    曹靖,胡恒觉.2000.不同肥料组合对冬小麦水分供需状况的研究.应用生态学报,11(5):713~717
    曾木祥,王蓉芳,彭世琪,张玉洁,崔勇,单秀枝.2002.我国主要农区秸秆还田试验总结.土壤通报,3(1):336~339
    陈德章.2000.稻草还田对土壤理化性质及产量的影响.土壤肥料,5:24~27
    陈恩凤,关连珠,汪景宽,颜丽,王铁宇,张继宏,周礼恺,陈利军,李荣华.2001.土壤特征微团聚体的组成比例与肥力评价.土壤学报,38(1):49~53
    陈华癸,樊庆笙.1980.微生物学.北京:农业出版社:58~63
    陈金海,李艳丽,王磊,张文佺,王红丽,付小花,乐毅全,管永健,邱忠虹.2011.两种基于芦苇秸秆还田的改良措施对崇明东滩围垦土壤理化性质和微生物呼吸的影响.农业环境科学学报,30(2):307~315
    陈尚洪,朱钟麟,吴婕,刘定辉,王昌全.2006.紫色土丘陵区秸秆还田的腐解特征及对土壤肥力的影响.水土保持学报,20(6):142~144
    陈鲜妮,来航线,田霄鸿,王旭东.2009.接种微生物条件下牛粪+麦秸堆腐过程有机组分的动态变化.农业环境科学学报,28(11):2417~2421
    程东娟,刘树庆,王殿武.2003.长期定位培肥对土壤酶活性及土壤养分动态变化影响.河北农业大学学报,26(3):33~45
    迟凤琴,宿庆瑞,王鹤桥.1996.不同有机物料在黑土中的腐解及土壤有机质平衡的研究.土壤通报,27(3):124~125
    崔文华,卢亚.1993.化肥和有机肥对作物产量和土壤养分影响的研究.土壤通报,24(6):271~272
    党廷辉,彭琳,戴鸣钧,李青.1995.长武旱塬春玉米氮肥效应试验研究.水土保持通报,9(1):55~63
    党廷辉,张麦.1999.有机肥对黑垆土养分含量、形态及转化影响的定位研究.干旱地区农业研究,17(4):1~4
    党廷辉.1999.施肥对旱地冬小麦水分利用效率的影响.生态农业研究,6(2):28~31
    邓婵娟.2008.长期施肥对稻田土壤氮素转化特征及酶活性的影响.[硕士学位论文].武汉:华中农业大学
    董玉良,劳秀荣,毕建杰,孙伟红.2005.麦玉轮作体系中秸秆钾对土壤钾库平衡的影响.西北农业学报,14(3):173~176
    窦森,陈恩凤,须湘成.1995.施用有机肥料对土壤胡敏酸结构特征的影响-胡敏酸的光学性质.土壤学报,32(l):41~49
    杜慧玲,李恋卿,潘根兴,王建锁,姚永平.2001.粉煤灰结合施肥对土壤微生物和酶活性的效应.土壤与环境,10(l):20~22
    杜茜,马琨,李久海.1999.城市生活垃圾堆肥对植物--土壤的影响.宁夏农林科技,(4):27~30
    杜社妮,梁银丽,徐福利,张成娥,陈志杰.2007.施肥对日光温室土壤微生物与酶活性变化的影响.中国生态农业学报,15(4):68~71
    樊虎玲等.2005.黄土高原旱地化肥和有机肥配施对小麦品质的影响.干早地区农业研究,23(5):72~76
    范丙全,唐玉霞,孟春香,M.Monreal.1999.长期施肥对土壤溶磷微生物的影响.河北农业科学,3(3):130~132
    范秀莲,曲英杰.2002.秸秆还田与农业可持续发展.农机化研究,(2):72
    方日尧,同延安,赵二龙,梁东丽.2003.渭北早原不同保护性耕作方式水肥增产效应研究.干早地区农业研究,21(1):54~57
    冯小明,樊贵盛.2006.引洪灌溉对土壤中速效钾的影响.太原理工大学学报.37(2):210~212
    高峻岭,宋朝玉,李祥云,王瑞英,李振清.2008.不同有机肥配比对蔬菜产量和品质及土壤肥力的影响.中国土壤与肥料,(1):48~51
    高明,周保同,魏朝富,谢德体,张磊.2004.不同耕作方式对稻田土壤动物、微生物及酶活性的影响研究.应用生态学报,15(7):1177~1181
    高瑞,吕家珑,张素霞.2006.长期施肥对塿土肥力及作物产量的影响.干旱地区农业研究,24(5):64~67
    高亚军,黄东迈,朱培立,王志明,李生秀.2000.稻麦轮作条件下长期不同土壤管理对氮素肥力的影响.土壤学报,37(4):456~463
    葛晓光,张恩平,高慧,张昕,王晓雪.2004.长期施肥条件下菜田—蔬菜生态系统变化的研究(Ⅱ)土壤理化性质的变化.园艺学报,31(2):178~182
    耿瑞霖,郁红艳,丁维新,蔡祖聪.2010.有机无机肥长期施用对潮土团聚体及其有机碳含量的影响.土壤,42(6):908~914
    宫亮,孙文涛,王聪翔,刘艳,汪仁.2008.玉米秸秆还田对土壤肥力的影响.玉米科学,16(2):122~124,130
    谷洁,李生秀,高华.2004.有机无机复混对旱地作物水分利用效率的影响.干旱地区农业研究,22(1):142~145
    谷洁,高华.2000.提高化肥利用率技术创新展望.农业工程学报,16(2):17~20
    关松荫.1986.土壤酶及其研究方法.北京:农业出版社
    关焱,宇万太,李建东.2004.长期施肥对土壤养分库的影响.生态学杂志,23(6):131~137
    韩秉进,陈渊,乔云发,韩晓增,孟凯.2004.连年施用有机肥对土壤理化性状的影响.农业系统科学与综合研究,20(4):294~296
    韩晓日,郭鹏程,陈恩凤,邹德乙.1997.长期不同施肥对氮肥利用率的影响.土壤肥料,(5):12~15
    韩战省.1998.澳大利亚的保护性耕作农业.山西农机,(3):40
    何炎森,李瑞美.2004.有机无机肥配施对甘蔗产量及土壤酶活性的影响.中国糖料,(4):36~38
    侯志研,杜桂娟,孙占祥.2004.玉米秸秆还田培肥效果的研究.杂粮作物,24(3):166~167
    黄占斌,山仑.1997.雨水利用与水土保持和农业持续发展.水土保持通报,17(1):54~56
    霍林.2007.长期施肥对黄土高原旱地黑垆土团聚体的影响.[硕士学位论文].兰州:甘肃农业大学
    霍竹,王璞,邵明安.2004.秸秆还田配施氮肥对夏玉米灌浆过程和产量的影响.干旱地区农业研究,22(4):33~38
    霍竹,付晋锋,王璞.2005.秸秆还田和氮肥施用对夏玉米氮肥利用率的影响.土壤,37(2):202~204
    贾伟,周怀平,解文艳,关春林,郜春花,石彦琴.2008.长期有机无机肥配施对褐土微生物生物量碳、氮及酶活性的影响.植物营养与肥料学报,14(4):700~705
    姜灿烂,何园球,刘晓利,陈平帮,王艳玲,李辉信.2010.长期施用有机肥对旱地红壤团聚体结构与稳定性的影响.土壤学报,47(4):715~722
    蒋仁成,厉志华.有机肥和无机肥在提高黄潮土肥力中的作用研究.1990.土壤学报,27(2):179~185
    蒋新和,蒋云芳,周玲.1998.小麦秸杆还田与化学氮肥配施技术探讨.作物杂志,(4):11~14
    金海洋,姚政,徐四新,杨建军.2006.秸秆还田对土壤生物特性的影响研究.上海农业报,22(1):39~41
    康天宇,李延,杨卓亚.2000.中国有机肥产业前景广阔.福建农业科技,(4):44~45
    孔宏敏,何圆球,吴大付,李成亮.2004.长期施肥对红壤旱地作物产量和土壤肥力的影响.应用生态学报,15(5):782~786
    孔庆波,聂俊华,张青.2005.生物有机肥对调亏灌溉下冬小麦苗期生长的影响.河南农业科学,(2):51~53
    劳秀荣,孙伟红,王真,郝艳如,张昌爱.2003.秸秆还田与化肥配合施用对土壤肥力的影响.土壤学报,40(4):618~622
    劳秀荣,吴子一,高燕春.2002.长期秸秆还田改土培肥效应的研究.农业工程学报,3(2):49~53
    李春九,马国瑞,石伟勇,陈炜,蒋春生.1999.新型有机无机复混肥对土壤及蔬菜产量品质的影响.浙江大学学报(农业与生命科学版),25(4):392~396
    李德成,张桃林.2000.中国土壤颗粒组成的分形特征研究.土壤与环境,9(4):263~265
    李贵桐,赵紫娟,黄元仿,李保国.2002.秸秆还田对土壤氮素转化的影响.植物营养与肥料学报,8(2):162~167
    李红,周连第,张有山.2003.秸秆还田对土壤蓄水保肥及作物产量的影响.中国生态农业学报,11(1):142~144
    李蕙岚.1999.浅析土壤酶活性与土壤肥力的关系.见:宋光煌,谢得体,孙彭寿(主编).迈向21世纪的土壤科学--提高土壤质量促进农业持续发展.中国土壤学会第九次全国代表大会论文集(重庆卷).重庆:重庆土壤学会:69~71
    李娟,赵秉强,李秀英,Hwat Bing So.2008.长期有机无机肥料配施对土壤微生物学特性及土壤肥力的影响.中国农业科学,41(1):144~152
    李科江,张素芳,贾文竹,宋平忠,刘树庆,霍习良,王玉朵.1999.半干旱区长期施肥对作物产量和土壤肥力的影响.植物营养与肥料学报,5(1):21~25
    李腊梅,陆琴,严蔚东,王校常.2006.太湖地区稻麦二熟制下长期秸秆还田对土壤酶活性的影响.土壤,38(4):422~428
    李孝勇,武际,朱宏斌,等.2003.秸秆还田对作物产量及土壤养分的影响.安徽农业科学,31(5):870~871
    李新举,张志国.1999.秸秆覆盖与秸秆翻压还田效果比较.国土与自然资源研究,(l):43~45
    李旭辉.2008.渭北旱塬春玉米高产栽培试验研究.陕西农业科学,(4):1~2
    李雪屏,陈垣,晋小军,窦学诚,潘峰.1994.有机肥对提高旱作土壤水分利用率的效应.干旱地区农业研究,12(2):12~15
    李月华,郝月皎,李娟茹,王英霄,许永红.2005.秸秆直接还田对土壤养分及物理性状的影响.河北农业科学,9(4):25~27
    李志勇,王璞,魏亚萍,Marion Boening-Zilkens.2003.不同施肥条件下夏玉米的干物质积累、产量及氮肥利用效率.华北农学报,18(4):91~94
    李忠佩,王效举.1998.红壤丘陵区土地利用方式变更后土壤有机碳动态变化的模拟.应用生态学报,9(4):365~370
    梁宗锁,康绍忠.1996.植物水分利用率及其提高途径.西北植物学报,16(6):79~84
    林葆.1994.长期施肥的作物产量和土壤肥力变化.植物营养与肥料学报试刊第一期,6~18
    林葆.1994.中国肥料.上海:上海科学技术出版社
    林治安,赵秉强,袁亮,Hwat Bing-So.2009.长期定位施肥对土壤养分与作物产量的影响.中国农业科学,42(8):2809~2819
    刘恩科,赵秉强,梅旭荣,HWAT B S,李秀英,李娟.2010不同施肥处理对土壤水稳定性团聚体及有机碳分布的影响.生态学报,30(4):1035~1041
    刘恩科,赵秉强,李秀英,姜瑞波,李燕婷,Hwat Bing So.2008.长期施肥对土壤微生物量及土壤酶活性的影响.植物生态学报,32(1):176~182
    刘更另.1992.营养元素循环和农业的可持续发展.土壤学报,(3):251~256
    刘京,常庆瑞,李岗,魏永胜.2000.连续不同施肥对土壤团聚性影响的研究.水土保持通报,20(4):24~26
    刘哭浩,高旺盛,朱文珊.2001.秸秆还田的机理与技术模式.北京:中国农业出版社:3~5
    刘琳.2011.浅谈玉米秸秆还田技术.安徽农学通报,17(06):40~41
    刘鹏程,丘华昌.1995.水稻高留茬还田的土壤培肥作用.湖北农业科学,(l):32~35.
    刘荣乐,金继运,吴荣贵,梁鸣早.2000.我国北方土壤作物系统内钾素循环特征及秸秆还田与施钾肥的影响.植物营养与肥料学报,6(2):123~132
    刘睿,王正银,朱洪霞.2007.中国有机肥料研究进展.中国农学通报,23(1):310~312
    刘孝义.1982.土壤物理及土壤改良研究法.上海:上海科学技术出版社:9~32
    刘杏兰,高宗,刘存寿,司立征.1996.有机、无机肥配施的增产效应及对土壤肥力影响的定位研究.土壤学报,33(2):138~147
    刘义新,韩移旺,唐绅,江玉平,江力,刘武定.2004.结晶有机肥对土壤供钾能力及钾在烟株的分布特点.植物营养与肥料学报,10(l):107~109
    刘玉涛.2003.旱地玉米施用有机肥的定位研究.玉米科学,11(2):86~88
    路磊,李忠佩,车玉萍.2006不同施肥处理对黄泥土微生物生物量碳氮和酶活性的影响.土壤,38(3):309~314
    路文涛.2011.秸秆还田对宁南旱区土壤理化性状及作物产量的影响.[硕士学位论文].杨凌:西北农林科技大学
    罗珠珠,黄高宝,张仁陟,蔡立群.2009.保护性耕作对旱作农田耕层土壤肥力及酶活性的影响.植物营养与肥料学报,15(5):1085~1092
    吕彪,秦嘉海,赵芸晨.2005.麦秸覆盖对盐渍土肥力及作物产量的影响.土壤,37(1):52~55
    马俊永,李科江,曹彩云,郑春莲.2007.有机-无机肥长期配施对潮土土壤肥力和作物产量的影响.植物营养与肥料学报,13(2):236~241
    马晓丽,贾志宽,肖恩时,王雯玥,刘婷,刘艳红,崔荣美.2010.渭北旱塬秸秆还田对土壤水分及作物水分利用效率的影响.干旱地区农业研究,28(5):59~64
    马永良,宇振荣,江永红,罗维,田淑敏.2003.曲周试区玉米秸秆不同还田方式对土壤氮素影响的探讨.土壤,1:62~65
    苗淑杰,周连仁,乔云发,曲均峰,徐文越.2009.长期施肥对黑土有机碳矿化和团聚体碳的分布影响.土壤学报,46(6):1068~1075
    莫翼翔.2002.干旱半干旱地区实施集水技术走“雨养农业”的理性思考.水土保持研究,(9)4:106~112
    倪仲吾,孙羲,杨肖娥,林咸永,陈妙贞.1990.有机无机肥配施对土壤中磷的有效性和水稻生长及产量的影响.土壤通报,21(4):167~169
    牛一川,姚天明,安建平,杨秀兰,张慧敏.2004.地膜覆盖栽培对冬小麦衰老进程的影响.麦类作物学报.24(3):90~92
    彭新华,张斌,赵其国.2003.红壤侵蚀裸地植被恢复及土壤有机碳对团聚体稳定性的影响.生态学报,23(10):2176~2183
    彭致功,杨培岭,王勇,任树梅.2006.再生水灌溉对草坪土壤速效养分及盐碱化的效应.水土保持学报.20(6):84~88
    彭祖厚.1998.秸秆还田在培肥地力上的作用.土壤肥料,(2):11~15
    綦伟,谭浩,翟衡.2006.干旱胁迫对不同葡萄砧木光合特性和荧光参数的影响.应用生态学报.17(5):835~838
    钱国胜.1981.田间持水量与土壤容重机械组成的相关特性.土壤通报,(5):12~14
    秦嘉海,金自学,陈广泉,刘金荣,谢晓蓉.2005.有机无机垃圾复混肥对土壤理化性质和玉米产量的影响.土壤,(5):559~562
    邱凤琼,严昶,陈恩凤.1987.土壤肥力实质的研究.土壤学报,24(3):232~238
    邱莉萍,刘军,王益权等.2004.土壤酶活性与土壤肥力关系分析.植物营养与肥料学报,10(3),277~280
    任祖淦,陈玉水,唐福钦,王东海,张逸清.1996.有机无机肥料配施对土壤微生物和酶活性的影响.植物营养与肥料学报,2(3):279~283
    沈善敏.1995.长期土壤肥力试验的科学价值.植物营养与肥料学报,3(1):1~9
    石健康,姜立新,戴昌浩,戴桂林,马少平.2006.稻草还田的效应研究.作物研究,(l):66~67
    宋朝玉,张继余,刘洪明,王圣健,李振清,高峻岭.2009.氮磷钾、秸秆还田和密度对玉米产量及农艺性状的影响.山东农业科学,2:37~40
    宋光煜.1996.秸秆还田是实施沃土计划的重要内容.土壤农化通报,11(3):10~16
    宋日,吴春胜,马丽艳,牟金明,徐克章,郭继勋.2002.有机无机肥料配合施用对玉米根系的影响.作物学报,28(3):393~396
    宋述尧.1997.玉米秸杆还田对塑料大棚蔬菜连作土壤改良效果研究(初报),农业工程学报.13(l):135~139
    宋伟,聂文丽,陈辉,王玲,刘春梅,王婧,冯雪蓉,纪茂德,柳宝忠,刘继春.1999.不同密度及施肥比例对优质麦产量的影响.黑龙江农业科学.(5):15~18
    宋永林,姚造华,袁锋明.2002.不同肥料配施对土壤主要养分含量及作物氮、磷、钾表观利用率的影响.土壤肥料,(3):23~25
    苏秦,贾志宽,韩清芳,李永平,王俊鹏,杨宝平.2009.宁南旱区有机培肥对土壤水分和作物生产力影响的研究.植物营养与肥料学报,15(6):1466~1469
    孙皓,王礼焦,高云,倪丹,方鸿国.2009.推广测土配方施肥技术加快耕地质量建设步伐.安徽农学通报.5(3):186~189
    孙宏德,肖延华.1995.试论有机肥料的增产作用.吉林农业科学:59~61
    孙瑞莲,赵秉强,朱鲁生,徐晶,张夫道.2003.长期定位施肥对土壤酶活性及其调控土壤肥力的作用.植物营养与肥料学报,9(4):406~410
    孙伟红,劳秀荣,董玉良,毕建杰.2004.小麦-玉米轮作体系中秸秆还田对产量及土壤钾素肥力的影响.作物杂志,(4):14~16
    孙伟红.2004.长期秸秆还田改土培肥综合效应的研究.[硕士学位论文].泰安:山东农业大学.
    谭金芳.2003.作物施肥原理与技术.北京:中国农业大学出版社:30~32
    汤树德,王风书.1993.秸秆还田原理及其应用.北京:北京农业大学出版社:1~5,47~53,97~101,130~131,189~191
    汤树德.1980.作物秸秆直接还田的土壤生物学效应.土壤学报,17(2):172~181
    唐小明.2003.有机肥的保水培肥效果及对冬小麦产量的影响.水土保持研究,10(1):131~132
    唐友斌.1997.河泥肥对土壤和大麦产量的影响.土壤肥料,(2):39~40
    陶军,张树杰,焦加国,李沙,刘满强,胡锋,李辉信.2010.蚯蚓对秸秆还田土壤细菌生理菌群数量和酶活性的影响.生态学报,30(5):1306~1311
    田敏,姜葆霖,李小红,李慧君.2004.生物有机肥的研究与应用效果分析,36(3):321~324
    汪德水.1997.旱地农田肥水关系原理与调控技术.北京:中国农业科技出版社:272~276
    汪景宽,冷延慧,于树,李双异,陈丽芳.2009.不同施肥处理下棕壤有机碳库对团聚体稳定性的影响.土壤通报,40(1):77~80
    汪军,王德建,张刚,王灿.2010.连续全量秸秆还田与氮肥用量对农田土壤养分的影响.水土保持学报,24(5):40~44
    汪寅虎.1994.长期定位条件下秸秆还田的综合效应研究.土壤通报,25(7):53~56
    王爱玲,陈阜.2001.黄淮海平原秸秆还田的现状、效应及发展趋势.持续高效农业理论与实践.北京:气象出版社:61~68
    王伯仁,黄家良.2002.红壤旱地长期施肥下土壤肥力及肥料效益变化研究.植物营养与肥料学报,8:21~28
    王才斌,朱建华,成波,张礼凤,孙秀山.2000.小麦秸杆还田对小麦、花生产量及土壤肥力的影响.山东农业科学,(1):34~35
    王才斌,郑亚萍,成波,沙继红,孙学忠,孙秀山,陈殿绪.2004.有机肥不同用量与分配方式对小麦花生两作产量的影响.山东农业科学,(2):54~55
    王德建,林静慧,孙瑞娟,夏立忠,连纲.2003.太湖地区稻麦高产的氮肥适宜用量及其对地下水的影响.土壤学报,40(3):426~432
    王冬梅,王春枝,韩晓日,张旭东,邹德乙,刘小虎.2006长期施肥对棕壤主要酶活性的影响.土壤通报,37(2):263~267
    王改兰,段建南,贾宁凤,廖建平.2006.长期施肥对黄土丘陵区土壤理化性质的影响.水土保持学报,20(4):83~84
    王贵寅,张兰松,宋加杰,张恒.2002.有机肥对提高旱地作物利用土壤水分的作用机理研究.河北农业科学,6(2):25~28
    王立刚,李维炯,邱建军,邱建军,马永良,王迎春.2004.生物有机肥对作物生长、土壤肥力及产量的效应研究.土壤肥料,(5):12~16
    王林权,周春菊,王俊儒,李生秀,邵明安.2002.鸡粪中的有机酸及其对土壤速效养分的影响.土壤学报,39(2):268~275
    王生录,武天云,邓娟珍.1996.旱塬地施用有机肥的保水培肥效果及对冬小麦产量的影响.甘肃农业科技,(4):26~29
    王同朝,聂胜委,黄晓书,张巧萍,王志勇.2006.机械化秸秆全量还田的研究现状及应用前景.河南农业大学学报,40(6):672~677
    王晓娟,贾志宽,梁连,赵二龙.2009.旱地有机培肥对玉米产量和水分利用效率的影响.西北农业学报,18(2):93~97
    王兴祥,张桃林,鲁如坤.2001.施肥措施对红壤结构的影响.中国生态农业学报,9(3):70~72
    王旭东,张一平,吕家珑,樊小林.2000.不同施肥条件对土壤有机质及胡敏酸特性的影响.中国农业科学,33(2):75~81
    王玄德,石孝均,宋光煌.2005.长期稻草还田对紫色水稻土肥力和生产力的影响.植物营养与肥料学报,11(3):302~307
    魏朝富,陈世正,谢得体.1995.长期施用有机肥对紫色水稻土有机无机复合性状的影响.土壤学报,32(2):159~166
    翁定河.2007.沿海旱地玉米施用有机肥对土壤肥力的影响.江西农业学报,19(5):66~68
    吴崇海,李振金,顾士领.1996.高留麦茬的整体效应与配套技术研究.干旱地区农业研究,14(l):43~48
    吴菲.2005.玉米秸秆连续多年还田对土壤理化性状和作物生长的影响.[硕士学位论文].北京:中国农业大学.
    吴光磊.2008.有机无机肥配施对玉米产量和品质的影响及生理基础.[硕士学位论文].泰安:山东农业大学
    吴政.1994.一年二季秸杆还田培肥增产效果研究.土壤肥料,(3):10~11
    武金果,管泽民.1995.几种常用有机肥增产效应及其对土壤肥力的影响.河南农业科学,(2):85~90
    向志民,何敏.2000.有机肥资源质量分析与评价.陕西农业科学,(5):14~16
    熊国华,林咸永,章永松,郑绍建.2005.施用有机肥对蔬菜保护地土壤环境质量影响的研究进展.科技通报,21(1):84~90
    熊明彪,雷孝章,田应兵,宋光煌,曹叔尤.2003.长期施肥对紫色土酶活的影响.四川大学学报(工程科学版),35(4):60~64
    徐国伟,常二华,蔡健.2005.秸秆还田的效应及影响因素.耕作与栽培,(1):6~9
    徐晶,陈婉华,孙瑞莲,周义清.2003.不同施肥处理对湖南红壤中微生物数量及酶活性的影响.土壤肥料,(5):8~11
    徐祖祥.2003.连续秸秆还田对作物产量和土壤养分的影响.浙江农业科学,(l):35~36
    薛坚,赵秉强,李凤超,李曾嘉.1993.秸杆直接还田的定位研究.土壤肥料,(2):27~29
    严慧岭.1993.盐土麦秸还田效应初探.土壤肥料,(5):15~17.
    杨景成,韩兴国,黄建辉,潘庆民.2003.土壤有机质对农田管理措施的动态响应.生态学报,23(4):787~796
    杨文治,绍明安.2000.黄土高原土壤水分研究.北京:科学出版社
    杨希.2009.有机无机配施对黑土肥力的影响.[硕士学位论文].哈尔滨:东北农业大学
    杨秀华,黄玉俊.1990.不同培肥措施下黄潮土肥力变化定位研究.土壤学报,27(2):186~194
    杨长明等.2003.有机无机肥配施对水稻剑叶光合特性的影响.生态学杂志,22(1): l~4
    杨志臣,吕贻忠,张凤荣.2008.秸秆还田和腐熟有机肥对水稻土培肥效果对比分析.农业工程学报,24(3):214~218
    杨志谦,王维敏.1991.秸杆还田后碳、氮在土壤中的积累与释放.土壤肥料,(5):43~46
    姚源喜,杨延蕃,刘树堂,蔡秋芳,邓迎海.1991.长期定位施肥对作物产量和土壤肥力的影响.莱阳农学院学报,8(4):245~251
    余峰,董立国,赵庆丰.2007.宁夏半干旱地区梯田土壤水分动态变化规律研究.水土保持研究,14(1):298~304
    于亚军,李军,贾志宽等.2005.旱作农田水肥耦合研究进展.干旱地区农业研究,23(3):220~224
    余延丰,熊桂云,张继铭,万炎生,苏运河,彭红,孙爱红.2008.秸秆还田对作物产量和土壤肥力的影响.湖北农业科学,(2):169~171
    禹盛苗,金千瑜,朱练峰.2007.绿营高TM有机生态肥对水稻生育和产量及经济效益的影响.中国稻米,(4):70~72
    袁玲,邦俊,郑兰君,刘学成.1997.长期施肥对土壤酶活性和氮磷养分的影响.植物营养与肥料学报,3(4):300~306
    张电学,韩志卿,刘微,高书国,等.2005.不同促腐条件下玉米秸秆直接物学效应研究.植物营养与肥料学报,11(6):742~749
    张福锁.1999.根际动态过程.植物营养土壤学报,39(3):239~250
    张洪熙,赵步洪,杜永林,谭长乐,戴正元,季红娟,王宝和,周长海.2008.小麦秸秆还田条件下轻简栽培水稻的生长特性.中国水稻科学,22(6):603~609
    张辉,李维炯,倪永珍.2005.一种生物有机无机复合肥的养分释放规律研究.农业环境科学学报,24(6):1123~1126
    张建林,陆欣,王申贵.2001.有机物料配比施用对土壤碱性磷酸酶活性的影响.土壤通报.32(2):278~284
    张璐,张文菊,徐明岗,蔡泽江,彭畅,王伯仁,刘骅.2009.长期施肥对中国3种典型农田土壤活性有机碳库变化的影响.中国农业科学,(5):1646~1655
    张美良等.2003.有机无机氮肥配施对棉花生育特性及土壤含氮量的影响.江西农业学报,15(3):11~15
    张鹏,贾志宽,路文涛,张晓芳,孙红霞,杨保平.2011.不同有机肥施用量对宁南旱区土壤养分、酶活性及作物生产力的影响.植物营养与肥料学,17(5):1122~1130
    张睿,刘党校.2007.氮磷与有机肥配施对小麦光合作用及产量和品质的影响.植物营养与肥料学报,13(4):543~547
    张淑香等.1999.农区秸秆还田对土壤理化性质的影响.土壤肥料,(4):15~17
    张晓海,杨春江,王绍坤,陈发荣,刘宝泉,张晓林,和丽忠,陈锦玉,樊永言.2003.烤烟施用菜籽饼后根际微生物数量变化研究.云南农业大学学报,18(1):14~19
    张旭东,须湘成,陈恩凤.1989.施用猪粪培肥土产壤后土壤氨基酸含量的变化.土壤通报,(6):260~263,248.
    张振江.1998.长期麦秆直接还田对作物产量与土壤肥力的影响.土壤通报,29(4):154~155
    张忠学,温金祥,吴文良.2000.华北平原冬小麦夏玉米不同培肥措施的节水增产效应研究.应用生态学报,(2):219~222
    赵春艳.2003.有机肥对保护地土壤性质及茄子、辣椒生长发育的影响.[硕士学位论文].长春:吉林农业大学
    赵兰坡.1996.施用作物秸杆对土壤的培肥作用.土壤通报,27(2):76~78
    赵良菊,肖洪浪,李新荣,罗芳,李守中.2005.灌水量对土壤水肥分布与春小麦水分利用效率的影响.中国沙漠.25(2):256~261
    赵世伟,苏静,杨永辉,刘娜娜.2005.宁南黄土丘陵区植被恢复对土壤团聚体稳定性的影响.水土保持研究,12(3):27~29
    赵秀兰,许大志,高云.1998.玉米根茬还田对土壤肥力的影响研究简报.土壤通报,29(1):14~16
    郑铁军.1998.黑土长期施肥对土壤磷的影响.土壤肥料,(1):39~41
    郑勇,高勇生,张丽梅,何园球,贺纪正.2008.长期施肥对旱地红壤微生物和酶活性的影响.植物营养与肥力学报,14(2):316~321
    郑昭佩,刘作新,魏义长,宋德香.2002.水肥管理对半干旱丘陵区土壤有机质含量的影响.水土保持学报,16(4):102~104
    中国农机学会农机化学会科技交流中心.1996.农作物秸秆利用技术与设备.北京:中国农业出版社:32~36
    钟杭,朱海平,黄锦法.2002.稻麦等秸秆全量还田对作物产量和土壤的影响.浙江农业学报,14(6):344~347
    周广业,阎龙翔.1993.长期施用不同肥料对土壤磷素形态转化的影响.土壤学报,30(4):443~446
    周建斌,李昌纬,赵伯善.1993.长期施肥对娄土底土养分含量的影响.土壤通报,24(1):21~23
    周江明,徐大连,薛才余.2002.稻草还田综合效益研究.中国农学通报.18(4):7~10
    周开芳.1999.强化有机质投入对土壤肥力和玉米产量影响的研究.耕作与栽培,(6):39
    周礼恺.1987.土壤酶学.北京:科学出版社:33~38
    周莉华.2004.长期施用生物有机肥对冬小麦和夏玉米生产效应的研究.[博士学位论文].北京:中国农业大学
    朱平,彭畅,高洪军,李强,刘春光,张林.2009.长期培肥对土壤肥力及玉米产量的影响.玉米科学,17(6):105~108,111
    朱同彬,诸葛玉平,刘少军,娄燕宏.2008.不同水肥条件对土壤酶活性的影响.山东农业科学,(3):74~78
    朱祖祥.1983.土壤学.北京:中国农业出版社
    朱祖祥.1979.土壤水分的能量概念及其意义.土壤学进展,(1):1~21
    左玉萍,贾志宽.2004.土壤含水量对秸秆分解的影响及动态变化.西北农林科技大学学报(自然科学版),32(5):61~63
    Acosta-Martinez V, Zobeck T M, Gill T E.2003. Enzyme activities microbial community structure insemiarid agricultural soil. Biology and fertility of soils,38(4):216~227
    Anthony Whithread, GraemeBlalr, YothinKonboon, etal.2003. Managing crop residues, fertilizers and leaflitters to improve soil C, nutrient balances, and the grain yield of rice and wheatcropping systems inThailandand Australia. Agriculture, Ecosystems and Environment,100:251~263
    Appelt H.1975. Interact ions between organic compounds, minerals and icons in volcanic ash derived soils,A dsorption of benzoate, P2OH benzoate, salicylate and phthalate ions. Soil Sci Soc Am Proc,39(4):623~627
    Bruce A.2005. Caldwell,Enzyme activities as a component of soil biodiversity: A Review.,49(6):637~644
    Bruee S E.2003. Poor growth of canola in retained wheat stubble causes consequences and control. Phdthesis, Charles Sturt University, Wagga
    Cassman K G, Gines G C.1996. Nitrogen-use effieiency in tropical lowland rice systems: contributionsfrom indigenous and applied nitrogen. Field Crops Res,47:1~12
    Davies, W.J., Tardieu, F., Trejo, C.I.1994. How do chemical signals work in plants that grown in dryingsoil. Plant Physiol.,104:309~314
    Davies, W.J., Zhang, J.1987. Increased synthesis of ABA impartially dehydrated root tips and ABAtransport from root to leaves. J.Exp.Bot.,38:2015~2023
    Davies, W.J., Zhang, J.1991. Root signals and the regulation of growth and development of plants indrying soil. Annu. Rev. Plant Physiol. Plant Mol.Biol.,42:55~76
    Dick R P.1988. Influence of Long-term residue management on soil enzyme activity in relation to soilchemical properties of a wheat-fallow system. Soil Biology and Biochemistry,(6):159~164
    Donald D, Howad.1998. Rotation and fertilization effects on corn and soybean melds and soybean cystnematode populations in a no-tillage system. Agronomy Joumal,90(4):518~522
    Doran J W, Sarrantonio M, Liebig M A.1996. Soil Health and Sustainability. Advances in Agronomy,56:1~54
    Goh K M, Pearson D R, Daly M J.2001. Soil Physical, chemical and biological indicators of soil quality inconventional, biological and integrated apple orchard management systems. Biol Agric Hort,18:269~292
    Govi M, Francioso O, Ciavatta C, Sequi P.1992. Influence of long-term residue and fertilizer applicationson soil humic substances: A study by electro focusing. Soil Science.154(1):8~13
    Hati K M, Swarup A, Dwivedi A K.2007. Changes in soil physical properties and organic carbon status atthe topsoil horizon of avertisol of central India after28years of continuous cropping, fertilization andmanuring. Agriculture, Ecosystems and Environment,119:127~134
    Huang Y, Chen L D, Fu B J.2005. The wheat yields and water-use efficiency in the Loess Plateau: strawmulch and irrigation effects. Agricultural Water Management,72:209~222
    J.S. Boyer.1982. Plant productivity and environment. Science,218:443~448
    Jagadish C. Tarafdar, Subhash C. Meena, Shyam Kathju.2001. Influence of straw size on activity andbiomass of soil microorganisms. Eur. J. soil Biol.37:157~160
    Joergensen R G, Emmeding C.2006. Methods for evaluating human impact on soil microorganisms basedon their activity, biolna, and diversity in agricultural soils. Journal of Plant Nutrition and Soil science,169(3):295~309
    Jones S K, Rees R M, Kosmas D.2006. Carbon sequestration in temperate grassland: management andclimatic controls. Soil Useand Management,22:132~142
    Kapkiyai J J, Karanja N K, Qureshi J N et a1.1999. Soil organic matter and nutrient dynamics in a Kenyannifisol under long-term fertilizer and organic input management. Soil Biol Biochem,31:1773~1782
    Kautz T, Wirth S, Ellmer F.2004. Mierobial activity in a sandy arable soil is govemed by the fertilizationregime. European joumal of soil Biology:40,87~94
    Kumar K, Goh K M, Scott W R, Frampton C M.2001. Effcets of15N-labeled crop residues andmanagement practices on subsequent winter wheat yields, nitrogen benefits and recovery under fieldconditions. J Agric Sci,136:35~53\
    Le Bissonnais Y, Arrouays D.1997. Aggregate stability and assessment of soil crustability and erodibilityII. Application to humic loamy soils with various organic carbon contents. European Journal of SoilScience,48:39~48
    Lilian G, Filomena S, Antonio Violante.1995. Pesticide effeets on the activity of free immobilized and soilinvertase. Soil Biology and Biochemistry,27(9):1201~1208
    Manna M C, Swarup A, Wanjar R H.2006. Soil organic matter in a west Bengal inceptisol after30years ofmultiple cropping and fertilization. Soil Science Society of America Journal,70:121~129
    Maynard Abigail A, Hill David E.1994. Impact of compost on vegetable yields. Pro Quest AgricultureJournals,(3):66~69
    Mengel K. and Braunschweig Von L C.1972. The effect of soil moisture upon the availability of potassiumand its influence on the growth young maize plants (Zea mays L.).Soil Sci.,114:142~148
    Mescatelli M C, Lagomarsino A, Marinari S.2005. Soil Microbial Indices as Bio-indicators ofEnvironmental Changes in A Poplar Plantation. Ecological Indicators,5:171~179
    Peng S B, Buresh R J, Huang J L,Yang J C, Zou Y B, Zhong X H, Wang G H, Zhang F S.2006. Strategiesfor overcoming low agronomic nitrogen use efficiency in irrigated rice systems in China. Field CropsRes,96:37~47
    Plaza C, Hernandez D, Garcia-Gil J C, Polo A.2004. Microbial activity in pig slurry-amended soils undersemiarid conditiongs. Soil Biology and Biochemistry,36:1577~1585
    Plaza C, Hernadez D, Garea-Gil JC, et al.2004. Microbial activity in Pig slurry-amended soil undersemiarid conditions.Soil Biology and Biochemistry,(36):1577~1585
    Sharpy A N. and Smith S J.1989. Mineralization and leaching of phosphorus from soil incubated withsurface-applied and incorporated Crop-residue. J.of Environmental quality,18(1):101~106
    Siddique MRB, Hamid A, Islam MS.1999. Drought stress effects on photosynthetic rate and leaf gasexchange of wheat. Botanical Bulletin of Academia Sinica,40:141~145
    Singh B, Malhi S S.2006. Response of soil physical properties to tillage and residue management on twosoils in a cool temperate environment. Soil and Tillage Research,85(1-2):143~1531
    Soon Y K.1999. Crop residue and fertilizer management effects on nutrient use and production. CanadianJoumal of Soil Science,(79):389~394
    Strong W. M and Barry G.1980. The availability of soil and fertilizer phosphorus to wheat and rape atdifferent water regimes. Aust.J.Soil Res.,18:353~362
    Sunita Gaind, Lata Nain.2007. Chemical and biological properties of wheat soil in response to paddy strawincorporation and its biodegradation by fungal inoculants. Biodegradation,18(4):495~503.
    Tester C F.1990. Organic amendment with effects on physical and chemical properties of a sandy soil. SoilSeience Society of American Journal,54:827~831
    Tisdall J M, Oades J M.1982. Organic matter and water-stable aggregates in soils. Journal of Soil Science,33:141~163
    Trethowan RM, Reynolds M, Sayre K, et al.2005. Adapting wheat cultivars to resource conservingfarming practices and human nutritional needs. Annals of Applied Biology,146:405~413
    Xiao YL, Jia DG.2002. Effects of different ridge furrow rations and supplemental irrigation on cropproduction in ridge and furrow rainfall harvesting system with mulches. Agricultural WaterManagement,54:243~254
    Yadvinder-Singh, Bijay-Singh,Ladha J.K, Khind,C.Setal.2004. Effeets of Residue DeeomPositiononProductivity and5011Fertility in Rice-wheat rotation. soil Science Society of America Joumal,68(3):854~864.