中国农业大学学报2024，Vol.29Issue(3)：36-49,14.DOI:10.11841/j.issn.1007-4333.2024.03.04
全生物降解渗水地膜覆盖对黄土高原旱作谷子土壤水热及产量的影响
Effects of fully biodegradable water permeable mulch on soil hydrothermal and the yield of dry-crop foxtail millet on the Loess Plateau
摘要
Abstract
In order to investigate the application effect of fully biodegradable water permeable plastic film mulch on soil hydrothermal and the yield of dry-crop foxtail millet in the dry-farming hilly area of the Loess Plateau,a field experiment was conducted from 2021 to 2022,A total of three different types of mulch cover,water permeable plastic film mulch(T1),plastic film mulch(T2)and fully biodegradable water permeable plastic film mulch(T3)were selected and no mulch(CK)is used as the control.The effect of the different types of mulch treatment on dry matter accumulation and yield of foxtail millet,soil water content and soil temperature and to anaylzed the degradation performance and economic benefits of fully biodegradable water permeable plastic film mulch were compared and analyzed.The results showed that:The degradation of fully biodegradable water permeable plastic film mulch(T3)began to occur at 30 d,and the reticulated cracks appeared in 150 d time.The most of the mulch was broken into small pieces,with an average degradation rate of 54.3％per unit area;The daily change of soil temperature in each fertility period of foxtail millet under mulching treatment showed a trend of increasing and then decreasing,and the soil temperature reached the highest at 16:00,and the temperature of three mulch treatments increased 0.5 to 8.0 C at 10 cm soil layer,and 0.3 to 6.5 ℃ at 20 cm soil layer compared with the non-mulching treatment(CK).At higher temperatures,soil temperatures in the T3 treatment was reduced by 0.5 to 3.5 ℃compared to the T2 treatment;Compared with CK,all mulching treatments increased soil water content in the 0 to 40 cm soil layer of the tillage layer by 7.8％to 38.1％;Mulching significantly increased the aboveground dry matter accumulation of cereals at the jointing stage,heading stage,and filling stage,with average increases of 37.7％to 91.2％,37.2％to 92.1％,and 15.4％to 56.6％for the T1,T2,and Ta treatments,respectively.In terms of yield,the 2-year seed yield and biomass yield of the fully biodegradable water permeable plastic film mulch treatment(T3)compared with CK were significantly increased by 35.4％to 37.5％and 30.8％to 44.1％,respectively,and the net income was increased by an average of 9 861.71 yuan/hm2.From the perspective of comprehensive consideration of foxtail millet growth,yield and soil moisture content and temperature and economic benefits,the fully biodegradable water permeable plastic film mulch can be applied to the production of dry-crop foxtail millet in the Loess Plateau instead of plastic film mulch,and it can effectively alleviate the soil environmental pollution caused by ordinary membranes.关键词
土壤水分/土壤温度/产量/全生物降解渗水地膜/降解速率/经济效益Key words
soil moisture/soil temperature/yield/fully biodegradable water permeable plastic film/degradation rate/economic benefits分类
农业科技引用本文复制引用
胡可欣,米俊珍,刘景辉,赵宝平,王莹,张兰英,崔雪梅..全生物降解渗水地膜覆盖对黄土高原旱作谷子土壤水热及产量的影响[J].中国农业大学学报,2024,29(3):36-49,14.基金项目
内蒙古科技计划项目(2022YFXZ0025) （2022YFXZ0025）
国家燕麦荞麦产业技术体系项目(CARS-07) （CARS-07）
国家重点研发计划国际合作重点专项(2018YFE0107900) （2018YFE0107900）
内蒙古重大专项(2021ZD0002) （2021ZD0002）
内蒙古自治区燕麦工程实验室能力建设项目(BR221023) （BR221023）
