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1、HansJournalofAgriculturalSciences农业科学,2017,7(2),55-65PublishedOnlineApril2017inHans.http://www.hanspub.org/journal/hjashttps://doi.org/10.12677/hjas.2017.72007StudyontheMaizeYield-IncreasingMechanismofAnnualDegradationCharacteristicsaboutDifferentBiodegradableFilmintheNorthernIrrig
2、ationAreaPingshengWang1,HongHan1*,TaoZhou2,QingyanHuang1,XiaYang11GansuAcademyofAgriculturalSciences,LinxiaGansu2GansuAgriculturalEcologicalEnvironmentalProtectionStation,LanzhouGansuthrdthReceived:Mar.15,2017;accepted:Apr.3,2017;published:Apr.6,2017AbstractBiodegradableplasticfilm
3、isanimportantwaytosolvetheproblemofplasticfilmresiduepollu-tion.Ithasgreatpotentialforagriculturaldevelopment,butdifferentbiodegradableplasticfilmsweredifferentindifferentecologicalregionsandaffecteditspopularizationandapplication.Inthispaper,comparativefieldexperimentswerecarriedo
4、utamongthreecultivationmethods,9biodegradablefilmscultivation,ordinaryPE(CK1)filmcultivationandopenfieldcultivation(CK2),fromfielddegradabilityofplasticfilm,soilthermalinsulation,cropgrowth,yieldanditscompositionfactors,residualplasticfilmcoverageandsoon.Theresultshowedthatthedegra
5、da-tionoftheselectedfourkindsofbiodegradableplasticfilmsGS05,GS09,GS10andGS03wasslowattheearlygrowthstageofmaizeandquickerinthemiddleandlaterstages,andthegrowthadaptabilityofmaizewasbetter.Thesoiltemperatureinthewholemaizegrowthperiodat10cmsoillayerfromemergencetojointingstage,from
6、tasselingtofillingstagecomparedtoCK1,de-creasedfrom0.1˚Cto0.5˚C,from0.5˚Cto1.0˚Candfrom0.2˚Cto0.5˚C.Thedifferenceofmaturityfromharvesttomaturitywasimprovedby−0.9˚C-0.6˚C.Emergencerate,plantheight,stemdi-ameter,paniclelength,grainnumberperpanicle,1000-grainweightcomparedtoCK1increas
7、edby−3.3-3.4percentagepoints,−16.7to−3.5cm,−0.2to−0.3cm,−2.7to0.0cm,−33.7to−16.4,−17.3to−7.0g;maizeyieldwas12,664.5~14,493.0kg/hm2,whichwas0.6~13.1%lessthanthatofCK1.Theresultsshowedthattheeffectoffourbiodegradablemulchesandordinarymulchingfilmonmaizeyieldwasnotsignificant,whichwas
8、86.3%-113.1%higherthanthat
