内蒙古科尔沁沙地旱作农业区,共有耕地97万hm2,其中玉米播种面积46.6万hm2。传统的种植方式是先翻后耙,开沟起垄,播种锄草,割下秸秆当柴烧。由于多次搅动土壤,水分散失严重,土壤风蚀沙化,团粒结构消失,肥力下降,加之自然降水逐年减少,地下水位持续 Inner Mongolia Horqin sandy dry farming area, a total of 970,000 hm2 of arable land, of which 466,000 hm2 corn sown area. The traditional planting method is to turn the harrow after the first, ditching Ridge, sowing weeding, cut straw as firewood. Due to repeated agitation of soil, serious water loss, soil erosion and sandification, aggregate structure disappear, fertility decline, combined with the natural precipitation decreased year by year, the water table continued