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《水稻秸秆还田条件下氮肥前移效果初探.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、第53卷第1O期湖北农业科学Vo1.53No.102014年5月HubeiAgriculturalSciencesMay.,2014水稻秸秆还田条件下氮肥前移效果初探丛日环,张智,刘秋霞,戴志刚2,曾艳芹3,李小坤,任涛,鲁剑巍(1.华中农业大学资源与环境学院/农业部长江中下游耕地保育重点实验室,武汉430070;2.湖北省土壤肥料工作站,武汉430070;3.湖北省枝江市环境监测站,湖北枝江443200)摘要:在湖北省水稻主产区布置秸秆还田条件下水稻氮素养分运筹试验,分析水稻种植时秸秆还田对氮肥不
2、同施用时期及比例的响应结果表明.在等量氮肥条件下2次施肥处理的稻谷产量显著低于3次施肥处理.而在秸秆还田条件下氮肥3次施用的稻谷产量略低于2次施肥处理,试验表明氮肥2次施用配合秸秆还田能够保持稻谷产量持续在较高水平.其产量与3次施氮、3次施氮配合秸秆还田以及高量氮肥3次施用配合秸秆还田均无显著性差异氮肥2次施用配合秸秆还田处理的氮肥偏生产力最高,可达到41.6~60.8kg/kg。研究结果说明秸秆还田条件下可以通过氮肥前移的调控措施保证稻谷产量,同时将氮肥利用效率维持在较高水平关键词:秸秆还田:氮:
3、后肥前移:水稻;产量中图分类号:S147.5文献标识码:A文章编号:0439—81l4(2014)10—2261—03EfectsoftheNitrogenFertilizationAdvanceonRiceunderStrawReturningConditionCONGRi—huanI,ZHANGZhiI,LIUQiu—xiaI,DAIZhi—gang2,ZENGYan—qin3,LIXiao-kunI,RENTao1,LUJian-wei(1.CollegeofResourcesandEnvir
4、onment,HuazhongAgriculturalUniversity/KeyLaboratoryofArableLandConservation(MiddleandLowerReachesofYangtzeRiver),MinistryofAgriculture,Wuhan430070,China;2.SoilandFertilizerStationofHubeiProvince,Wuhan430070,China;3.EnvironmentInspectionStationofZhijian
5、gCity,Zhijiang443200,Hubei,China)Abstract:Nitrogen(N)fertilizeroperationalexperimentwithstrawreturninginthreemainriceplantingcountiesofHubeiprovincewasconductedtofindeffectsofnitrogenfertilizationtimeandratioonriceyieldandpartialfactorproductivityofnit
6、rogenapplication()understrawreturningcondition.Theresultsshowedthatriceyieldwassignificant(P<0.05)lowerinthetwo—splitNfertilizationthanthatinthethree—splitNfertilizationwiththesametotalNfertilizationrate.Withstrawreturning,riceyieldwasrelativelylowerin
7、thethree-splitNfertilizationthanthatinthetwo-splitNfertilization.Forallthesethreesites,two—splitNfertilizationwithstrawreturningcouldmaintainhighlevelyieldofpresentingnosignificantdifference(P8、Nfertilizationwithstrawreturningandthree-splitofhighNratewithstrawreturning.ThePFPNvaluewashighestinthetwo-splitNfertilizationwithstrawreturningtreatment.reachingto41.6-60.8kg/kgamongthethreesites.Itisindicatedthattwo-splitNfertilizatio
8、Nfertilizationwithstrawreturningandthree-splitofhighNratewithstrawreturning.ThePFPNvaluewashighestinthetwo-splitNfertilizationwithstrawreturningtreatment.reachingto41.6-60.8kg/kgamongthethreesites.Itisindicatedthattwo-splitNfertilizatio
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