我省旱地玉米面积占70％。由于干旱缺水、土壤瘠薄、水土流失严重,因此玉米产量常年低而不稳,直接影响着全省粮食总产量的增长。近几年来,针对旱地玉米生产中存在的干旱缺水、水土流失、土壤瘠薄、品种不优、密度过小等问题,经过反复试验研究、示范推广,优选出旱地玉米秸秆覆盖新技术,增产效果显著。此项新技术不仅能蓄水保墒、提高水分利用率,减少地面径流量,而且能培肥土壤,提高土壤中有机质、氮、磷、钾 Dry corn in our province accounted for 70% of the area. Due to drought and water shortage, infertile soil and serious soil erosion, corn production is low and unstable all the year round, which directly affects the growth of the province’s total grain output. In recent years, aiming at the problems such as drought and water shortage, soil erosion, soil infertility, low density and other problems in dryland maize production, after repeated experimental research, demonstration and popularization, the new technology of covering maize straw in dry land is optimized and the yield increase Significant. This new technology can not only store water and soil moisture, improve water use efficiency, reduce surface runoff, but also fertilize the soil and improve soil organic matter, nitrogen, phosphorus and potassium