Study on Modified Biodegradable Polyethylene Agricultural Mulch Film for Cotton
This paper aims to improve polyethylene film to prevent residual film infiltration and soil pollution under the premise of keeping temperature and moisture. The common film and the modified biodegradable polyethylene film were used in the film mulching experiment by using the test method and the comparison method. The results of laboratory tests showed that after 72 hours of ultraviolet aging treatment and infrared characterization,the modified biodegradable polyethylene film was almost completely degraded,while the ordinary film had almost no change. Under the same thickness and test conditions,the properties of the modified biodegradable polyethylene film were basically the same as those of the ordinary film. The field experiment of two kinds of films applied to cotton field in Dezhou City,Shandong Province showed that the moisture retention performance of the degradable polyethylene film was equivalent to that of the common film,and better than the bare land. And the degradation effect of degradable mulching film was in line with the design goal. The modified biodegradable polyethylene film used in this paper has the same performance as common mulch film,and has better degradation ability,which provides a new product for preventing residual film penetration and soil pollution.