（１）改善土壤物理性能。秋耕水田可使板结的土壤疏松变为活土，残留的根茬等翻入土中，腐烂后，有利于土壤团粒结构的形成。（２）改善土壤中的水分状况。秋耕水田利于接纳雨水；切断土壤毛细管作用能减少水分蒸发，便于蓄水保墒。据春季泡田前测试，水田秋耕层土壤含水... (1) improve soil physical properties. The autumn paddy field can loose the loose soil into loose soil, residual root stubble into the soil, decay, is conducive to the formation of soil aggregate structure. (2) to improve the water conditions in the soil. Autumn tillage paddy is conducive to receiving rainwater; cut off the role of soil capillary can reduce the evaporation of water, easy to water and soil moisture. According to the spring before the test field, autumn paddy soil moisture ...