在土默川沿山井灌区,实行小麦玉米套种,多采用:①小麦、玉米7尺×2尺带状种植,小麦宽幅条播(播幅8寸,幅距6寸),玉米双行双株(行株距各一尺,窝留双株);②小麦、玉米5尺×5尺带状种植(有的在小麦收获前再套种马铃薯或糜黍,玉米行间点黄豆),因为这两种套种形式有利于构成较好的田间作物群体结构,又对农田气候有较显著的改善和调节作用,可使在超过一般大田密度的条件下,仍能获得较适宜的生态环境,田间风、光、热等要素优于大 The implementation of wheat and wheat intercropping in the Tianshanjing Irrigation District of Tumochuan County mostly uses: ① wheat and corn 7-inch × 2-foot strip planting, broad-width wheat sowing (8-inch breadth and 6-inch breadth), two- Row spacing of one foot, nest stay double strains); ② wheat, corn 5 feet × 5 feet banded planting (some before the wheat harvest before intercropping potato or chickpea, corn line point soybeans), because these two kinds of interplanting The form is conducive to the composition of a better field crop community structure, but also a more significant improvement and regulation of cropland climate, allowing more than the average field density conditions, can still get more suitable ecological environment, field wind, light, Heat and other factors better than large