我县海拔千米以上的高寒山区,由于山高气寒,年有效积温低,旱地一般每年只在地膜玉米间套种一季露地马铃薯,产量、效益均较低。为此,我们对原间套作模式进行了大胆改革:一是压缩植株较高、产量与效益较低的玉米面积,扩大植株较矮、产量与效益较高的马铃薯面积; Due to the high altitude and cold, the effective accumulated temperature is low in the alpine mountainous area at an elevation of more than 1000 meters above sea level. The dry land is usually planted with only one season of potatoes in the field of maize and mulch every year, yield and benefits are low. To this end, we boldly reform the original cropping pattern: first, to shrink the area of ​​corn with higher plant yield and lower benefit, to expand the area of ​​potatoes with shorter plants and higher yields and benefits;