半干旱地区地膜覆盖对作物产量和氮效率的影响

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1、Seediscussions,stats,andauthorprofilesforthispublicationat:https://www.researchgate.net/publication/11601103[Effectofplasticfilmmulchingoncropyieldandnitrogenefficiencyinsemiaridareas]ArticleinYingyongshengtaixuebao=Thejournalofappliedecology/Zhongguoshengta

2、ixuexuehui,ZhongguokexueyuanShenyangyingyongshengtaiyanjiusuozhuban·April2001Source:PubMedCITATIONSREADS10504authors,including:Feng-MinLiJunWangLanzhouUniversityNorthwestUniversity298PUBLICATIONS6,052CITATIONS50PUBLICATIONS624CITATIONSSEEPROFILESEEPROFILES

3、omeoftheauthorsofthispublicationarealsoworkingontheserelatedprojects:DrylandEcosystemSustainableStrategyViewprojectgrasslandrestorationViewprojectAllcontentfollowingthispagewasuploadedbyFeng-MinLion03March2015.Theuserhasrequestedenhancementofthedownloadedf

4、ile.应用生态学报2001年4月第12卷第2期CHINESEJOURNALOFAPPLIEDECOLOGY,Apr.2001,12(2)∶205～209＊半干旱地区地膜覆盖对作物产量和氮效率的影响＊＊李世清李凤民宋秋华王俊(兰州大学干旱农业生态国家重点实验室,兰州730000)【摘要】在年降水量415mm的半干旱地区黄绵土上,以春小麦为供试作物进行大田试验,研究地膜覆盖进程(包括不覆膜、播种后覆膜30d、覆膜60d和全程覆膜)、底墒和施N对作物产量和N效率的影响.结果表明,增加底墒、地膜覆盖和施N均会显著

5、增加作物产量和吸N量(α<0.01),其影响顺序为N肥>底墒>覆膜.覆膜对产量的效应因底墒、施N和覆膜进程而异.从平均看,在低底墒时,各种覆膜处理产量虽有增加,但与不覆膜处理间的差异并不显著,而在高底墒时,以覆膜60d的产量最高,以不覆膜最低.由于覆膜和底墒影响作物产量和吸N量,因而也影响N效率.在低底墒时,以不覆膜和覆膜30d时N效率最高,而在高低墒时,30d、60d和全程覆膜处理间差异不显著.综合作物产量和N效率,全生育期覆膜并没有多少实际意义.关键词旱地地膜覆盖作物产量N效率文章编号1001-9332

6、(2001)02-0205-05中图分类号S158文献标识码AEffectofplasticfilmmulchingoncropyieldandnitrogenefficiencyinsemiaridareas.LIShiqing,LIFengmin,SONGQiuhuaandWANGJun(StateKeyLaboratoryofAridAgroecology,LanzhouUniversity,Lanzhou730000).-Chin.J.Appl.Ecol.,2001,12(2):205～209.Th

7、eeffectofplasticfilmmulching,waterstorageinsoilprofilebeforesowing,andnitrogenfertilizationoncropyieldandnitrogenefficiencywasexaminedinthispaper.Thestudysitewasonthecultivatedlossialsoilinsemiaridareaswith415mmofannualrainfallandthetestcropwasspringwheat,

8、Triticumaestivum.Inordertostudytheeffectofplasticfilmmulching,4levelsofmulchingweredesigned,includingmulchingof0,30and60daysaftersowingandmulchingoverthewholegrowingperiod.Theresultsshowedthatincreaseofsoilwa