水旱轮作对土壤物理性质影响的研究结果表明:渍水稻田水改旱后,土壤的三相组成、结构性、孔性、透水性、持水性和供水性明显改善,土壤逐步向旱地方向发展;而旱改水后,则上述土壤物理性状出现向水稻土方向发展的趋势。这种趋势在耕作层比犁底层更明显。 The results of the study on the effects of the rotation and precipitation on soil physical properties showed that the three-phase composition, structure, porosity, water permeability, water holding capacity and water supply of the soil were significantly improved and the soil gradually developed toward the dry land However, after the drought was changed to water, the above-mentioned soil physical properties tended to develop in the direction of paddy soil. This trend is more pronounced in the tillage than in the plow.