黄淮平原小麦—玉米一年两熟地区，多采用秋季耕翻播种小麦，玉米则采取麦田套种，受机械动力及传统观念因素的影响，秋耕深度一般在２０～２３cm，年复一年犁底层变坚硬。特别是褐土类土壤，犁底层的形成限制了小麦根系的生长发育，不但影响了小麦对土壤深层肥水的利用，而且? Huanghuai Plain wheat - corn cooked twice a year in areas, more use of autumn tillage sowing wheat, corn is taken intercropping wheat, mechanical power and the traditional concept of factors, the depth of autumn planting is generally 20 ~ 23cm, year after year plow The bottom becomes hard. In particular, the formation of cinnamon soil and plow floor limits the growth and development of wheat root system, which not only affects the utilization of wheat in deep soil water,