关键词: 西瓜, 西瓜, 黄河灌区, 互作效应, 数学模型, 优化方案

Abstract: To clarify the status of plastic film pollution and utilization in Shanxi Province, methods of questionnaire survey and sample analysis were used to statistically analyze the plastic film problems in all cities and counties in Shanxi Province, and a real-time observation of plastic film use condition was conducted in Shouyang. The results showed that the thickness of currently used film was mostly under 0.008 mm; more than 90% was common plastic film, degradable plastic film mulching was rare; the top three crops with film covered planting area were vegetables, corn and potato, there was partially covered winter wheat in the south of the basin; Datong, Xinzhou and Linfen had the largest film usage; plastic film recycling rate was very low, and most of the film was left unused on roads, or processed by landfill and incineration or turned directly into the soil, more and more residual film was in the soil, mainly concentrated in the 0-20 cm soil layer. If there is still no full attention to the problem of film mulching recycle, the residual film will exceed the national farmland film residue limit standards soon, thus inhibit the growth of crops, and affect the yield and quality. The analysis provides references for the prevention and control of residual membrane in Shanxi Province.