在我省南部黑土地区旱作条件下,玉米和谷茬种大豆轮作环节上,旋耕比翻耕更好的疏松了表土,并使下层保持紧实,这种“上虚下实”的耕层构造,使之干旱时期土壤保水较多和多雨时期贮水较多,相伴以土壤中有效氮、磷的增加。旋耕土壤水肥状况的改善,促进了大豆出苗和生长,植株经济利用水分,抗旱性增强,产量提高。旋耕的作业次数少,节约油料,成本降低和工效显著提高,因此,在我省旱作条件下,某些轮作环节上以旋耕代替翻耕不仅完全可行而且经济有效。通过中间试验明确了旋耕技术适应地区和推广范围,而在生产条件下示范试验,确定了进行旋耕之后具有显著的经济效益和社会效益。 In the southern part of our province in the black soil dry conditions, corn and stubble rotation of soybean section, rotary tillaplotting better than tilling loosen the topsoil, and to keep the underlying compact, this “virtual reality” tillage Layer structure, making the soil more water during drought and more water storage during rainy season, accompanied by an increase of available nitrogen and phosphorus in the soil. The improvement of water and fertilizer status in rotary tillage promoted the emergence and growth of soybean, the economic utilization of water by plants, increased drought resistance and increased yield. Therefore, under the conditions of dry cultivation in our province, it is not only feasible and economical to use rotary plowing instead of tillage in some rotation processes. Through the intermediate test, it was clarified that the rotary tillage technology was adapted to the region and the promotion range, and the demonstration test was conducted under the production conditions to determine that the rotary tillage had significant economic and social benefits.