近几年,玉米在梨树县的种植面积占粮豆总面积的70%左右,产量占粮豆总产的85%以上。玉米的单产水平随着栽培技术的改进而逐步提高,其中玉米与矮秆(早熟)作物的间、套立体种植起了重要作用。玉米间、套立体种植的益处是:①能充分利用4-9月份的整个生长季节(长约160天);②充分利用空间,增加叶面积指数(清种玉米叶面 In recent years, the planting area of ​​corn in Lishu County accounts for about 70% of the total area of ​​grain beans, and its output accounts for more than 85% of the total output of grain beans. The yield of maize increased gradually with the improvement of cultivation techniques. The maize and dwarf (precocious) crops played an important role in the intercropping and intercropping. Maize, set three-dimensional planting benefits are: ① can make full use of April-September the entire growing season (about 160 days); ② make full use of space, increase the leaf area index