青贮玉米—紫花苜蓿立体种植水肥耦合效应的分析分析

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1、-increasedwiththeincreaseoffertilizer,availablephosphoruscontentofAlfalfaharvesttwocropswerehigherthanbeforesowing,whilethecontentofavailablepotassiumwaslowerthanthatbeforesowing.3.Ontwokindsofcropplantingconditionsyieldsimulationresults:significantlyaffecte

2、dtheyieldofAlfalfafrombigtosmallorderis:W>P>N,significanteffectofsilagemaizeyieldsequencefromhightolow:W>N>P;Atthesametime,theanalysisofsinglefactoranalysisandinteractionalso,theyieldofAlfalfaincreasedandthendecreasedtrendwithincreaseofNandW,increasedwiththe

3、increaseofPcontent;therewillbeincreasingeffectofPandWwithinacertainrange,theexcesswillleadtoadeclineinoutput;SilagemaizeyieldwasfirstincreasedandthendecreasedwiththeincreaseofNandP,increasedwiththeincreaseofWcontent,WforNandPplayeffect,NandPinteractionwithin

4、acertainrangehaseffectonincreasingyield,excessiveusewillbemutualinhibition.4.Theoptimalirrigationschemeoftwokindsofcropsplantingconditions:irrigation(X1):63.2%~67.4%;nitrogen(X2):278.4~291.8kg/hm2;Phosphorus(X3):223.8~237.5kg/hm2KeyWords:Stripintercropping;W

5、aterandfertilizercoupling;Quadraticregressionorthogonaldesign;Cropwaterrequirement;YieldDirectedby:Prof.LVZhiyuanApplicantforMasterdegree:WEIXuemin（AgriculturalWaterandSoilEngineering)(CollegeofMechanicalandElectricalEngineering.InnerMongoliaAgriculturalUniv

6、ersity.Hohhot010018.China)---目录1引言................................................................11.1研究的背景与意义................................................11.2国内外研究现状..................................................17.5乳业饲草料的特点...........................

7、...................17.6立体种植国内外研究现状........................................27.7水肥耦合国内外研究现状........................................31.2.3.1水肥耦合概述................................................31.2.3.2水肥耦合对土壤水分、养分的影响研究现状......................41.2.3.3水肥耦合对紫花苜蓿性

8、状影响的研究现状........................41.3研究目标、内容与技术路线........................................61.3.1研究目标与内容................................................61.3.2研究技术路线.................................