覆膜穴播为小麦生长发育创造了一个相对稳定的农田生态环境，综合协调了水、肥、气、热、光等影响产量的各单因子的效应。其增产原因表现在：（１）延长作物生育期在青海省互助县浅山、脑山地区同时播种的情况下，覆膜比对照区早出苗７～１５天，而成熟期又基本相同，主要... Film-mulching has created a relatively stable farmland ecological environment for wheat growth and development, and has integrated and coordinated the effects of single factors such as water, fertilizer, gas, heat and light that affect the yield. The reasons for the increase are as follows: (1) In the case of prolonging the crop growth period, when the sowing is carried out in the light mountain and the brain hill area of ​​Huzhu County, Qinghai Province, the film is 7 to 15 days earlier than the control area, while the mature stage is basically the same. ..