地膜覆盖栽培,是伴随化学工业发展而产生的一项农业新技术,为探明其高产的技术关键及理论基础,近年来我院开展了一些试验研究工作,现将1984～1985年的试验结果总结分析如下。材料和方法试验所用薄膜,为哈尔滨塑料五厂生产,供试甜菜品种为双丰八号。试验田为淋溶黑钙土,含全氮0.15％,全磷0.056％,全钾2.37％,有机质2.95％;速效氮103ppm,速效 Film mulching cultivation is a new agricultural technology accompanied by the development of chemical industry. In order to find out the key technology and theoretical basis of its high yield, our institute has carried out some experimental research in recent years. Now, the test results from 1984 to 1985 The summary analysis is as follows. Materials and Methods The film used for the experiment was produced by Harbin No.5 Plastic Factory and the beet variety for testing was Shuifeng No.8. The experimental field is leached chernozem containing 0.15% total nitrogen, 0.056% total phosphorus, 2.37% total potassium and 2.95% organic matter; 103 ppm available nitrogen,