尽管象免耕等保护性耕作制度对作物生长和产量的影响因地区、环境和土壤类型而异,但在控制侵蚀方面却已表现出巨大的潜力。本研究旨在评价亚热带多湿气候条件下,免耕与传统耕作法对栽培在重粘土上粒用高粱生长发育的影响。这两种耕作方法对高粱产量和土壤含水量的影响无大区别,但免耕下整个发育期间土壤含水量有增高的趋势。免耕处理下高粱穗分化时叶面积指数下降,但不影响籽粒产量。 Although the impact of conservation tillage systems such as zero-tillage on crop growth and yield varies by region, environment and soil type, there has been tremendous potential for controlling erosion. The purpose of this study was to evaluate the effects of no-till and conventional tillage methods on the growth and development of grain sorghum for heavy clay in a subtropical humid climate. There was no significant difference between the two farming methods on sorghum yield and soil moisture, but the soil moisture content tended to increase during the whole tillage under no-tillage. Leaf area index decreased during spike differentiation of sorghum under no-till treatment, but did not affect grain yield.