采用二次正交旋转组合设计方法，建立了淡黑钙土土壤容重、含水率和种子发芽率的回归模型。并采取逐日跟踪监测的方法，描绘了不同镇压条件下种床土壤水分变动曲线。 A quadratic orthogonal rotation combination design method was used to establish a regression model of soil bulk density, water cut and seed germination rate of calcareous soil. The method of daily follow-up and monitoring is also adopted to describe the soil moisture variation curve of seedbed under different repression conditions.