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影响高寒山区粮食增产的主要因素之一是积温不足。利用地膜覆盖能增加土壤积温,解决玉米杂交种不能成熟问题。1987年和1988年我们在海拔1250米的栾川县三川乡设置了秋玉米盖膜与不盖膜地温对比观察及盖膜玉米不同播期试验,以取得数据指导大面积生产,现把试验结果总结如下。一、试验方法(一)地温对比观察:选用玉米品种丹
One of the main factors that affect the grain yield increase in cold and mountainous areas is the lack of accumulated temperature. Use of plastic film mulching can increase soil accumulated temperature, to solve corn hybrids can not mature problem. 1987 and 1988, we set an altitude of 1,250 meters in Sanchuan Township, Luanchuan County set autumn corn cover film and cover the ground temperature contrast observation and cover film corn different sowing date to obtain data to guide large-scale production, the test results Summarized as follows. First, the test method (A) comparison of ground temperature observation: selection of corn varieties Dan