液态地膜对退化土地植物群落特征和土壤水分利用效率的影响  

Effects of Liquid Mulching Film on Plant Community Characteristics and Soil Water Use Efficiency in Degraded Land

作　　者：秦洁 宋莉 黎轩 武晓燕[1] 赵斌[1] QIN Jie;SONG Li;LI Xuan(Tianjin Recyclable Resources Institute,All China Federation of Supply and Marketing Cooperatives,Tianjin 300191,China)

机构地区：[1]中华全国供销合作总社天津再生资源研究所,天津300191

出　　处：《中国水土保持》2022年第8期21-24,I0001,共4页Soil and Water Conservation in China

基　　金：国家重点研发计划项目(2017YFF0206800,2018YFF0213500);自主研发项目(ZSZY/YF-2021-001,ZSZY/YF-2022-001)。

摘　　要：液态地膜可有效缓解“白色污染”,减少塑料地膜的使用,对生态环境有一定的保护作用。在华北平原退化土地上设置CK(0 kg/hm^(2))、Y0.5(187.5 kg/hm^(2))、Y1(375 kg/hm^(2))、Y1.5(562.5 kg/hm^(2))、Y3(1125 kg/hm^(2))5个液态地膜喷施梯度进行试验,研究液态地膜对植物地上生物量、群落多样性和水分利用效率的影响,结果表明:植物地上生物量在Y1.5处理下显著最高(P<0.05),比CK高65.3%;植物群落多样性在Y3处理下显著最高(P<0.05),比CK高57.2%;水分利用效率在Y1.5处理下显著最高(P<0.05),比CK高69.67%。相关性分析表明,土壤水分利用效率与植物地上生物量、植物群落多样性呈显著正相关关系。综合分析,液态地膜可促进植物生长,提高群落多样性,有利于土壤水分的有效利用。The liquid mulching film can effectively alleviate“white pollution”,reduce the use of plastic mulching film and protect the ecological environment. The paper set up five liquid mulching film sprayed grades treatments in degraded land on the North China Plain to reasearch the effect of liquid mulching film on plant aboveground biomass,community diversity and water use efficiency,including CK( 0 kg/hm2),Y 0.5( 187.5 kg/hm2),Y1( 375 kg/hm2),Y1.5( 562.5 kg/hm2),Y3( 1 125 kg/hm2). The results show that a) aboveground biomass of Y1.5 is the highest significantly among five treatments( P<0.05),which is 65.3% higher than CK;b) plant community diversity index of Y3 is the highest significantly among five treatments( P<0.05),which is 57.2% higher than CK;c) water use efficiency of Y1.5 is the highest significantly among five treatments( P<0.05),which is 69.67% higher than CK. The correlation analyses show that soil water use efficiency is positively correlated with aboveground biomass and plant community diversity. This study reveals that the liquid mulching film can promote the growth of plants and improve community diversity,which is beneficial of effective utilization of soil water.

关 键 词：液态地膜 植物群落多样性 地上生物量 水分利用效率 生态修复 

分 类 号：S157.9[农业科学—土壤学] S152.7[农业科学—农业基础科学]