不同类型地膜覆盖对旱作区饲用玉米生长及土壤水热状况的影响

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关键词：全生物降解地膜；饲用玉米；生长；产量；土壤水热状况；地膜残留量中图分类号：S513 文献标志码：A 文章编号：2097-2172（2025）07-0628-05doi：10.3969/j.issn.2097-2172.2025.07.007

Effects of Different Types of Film Mulching on the Growth of Forage Maize andSoil Hydrothermal Status in Dry Farming Areas

DAI Lilan¹， ZHAO Yalan1， LI Mingkai²， WANG Jin²， ZHANG Guangquan³， CAO Jing² （1.LanzhouCityAgriculturalTechnologyResearchandExtension Centre，Lanzhou Gansu3Oooo，China;2.Lanzhou Univesity Lanzhou Gansu 73oooo， China; 3. Agricultural Technology Extension Centre of Yuzhong County， Yuzhong Gansu 730100， China）

Abstract：Inordertoidentifysuitabletypesof mulchingfilmformaizeproductionindryfarmingareas，theefectsof fuly biodegradableatereableflodegdablefdtioalofgezeowield，silol condition，andfiesidewereivestigated.TheresultsshowedtatomparedwithconventionalPEflm，thefulliodgadable and water-permeable biodegradable films entered the induction phase （crack <1 cm） at 25 and 35 days after mulching，respectively， therupture phase（crack > 3cm） at 78 and 82 days，and the disintegration phase（crack > 5 cm） at 148 and 156 days. Compared with PEfilm，maizeemergenceandjoitingstagesweredelayedunderbiodegradableflms，whilethetrumpetstage，tasselingstagend early dough stage occurred earlier.Soil moisture in the tillage layer decreased by 11.66% and 5.61% at the trumpet stage，and by （204 19.52% and 7.14% atthemilking stage，respectively.Soil temperature declined slightly during theearly growth stage （seedling to jointing），butdeclinedmorenoticeablyduringthelaterstage（fromtrumpetonward）.Theyieldoffreshmaizestalkdecreased significantly by 12.39% and 13.34%（P<0.05） ，while mulch film input cost increased by 100% and 125% ，and gross profit decreased by 10.60% and 12.51% ，respectively.Meanwhile，film residue was reduced by 58.33% and 33.33% .Overall，although the use of biodegradablefilmsledtoacertainreductioninbiomassyieldandprofitduetohighercosts，thesignificantlylowerfilresidue comparedtoPEfilmisconducivetothesustainableandhigh-qualitydevelopmentoftheforagemaizeindustryinaridrainfed agricultural regions.

KeyWords：Fully biodegradablemulch film;Forage maize;Growth; Yield; Soil hydrothermal condition;Mulch filmresidue

玉米是甘肃省广泛种植的粮饲兼用作物，面积保持在100.9万 hm2 左右，饲用玉米以籽粒或者鲜秸秆全株（含茎、叶、籽实）青饲、青贮、调制干草，是畜牧业的主要饲料。（剩余6598字）