对裸地和砂田0~40 cm土层土壤容重和饱和含水率的测定结果表明:裸地的容重和饱和含水率随土层增加分别呈指数负相关和指数正相关，砂田的容重和饱和含水率分别呈指数正相关和指数负相关。裸地的平均容重较砂田增加了1.61%，平均饱和含水率减少了3.82%。0~30 cm土层土壤容重裸地 ＞ 砂田，饱和含水率裸地 ＜ 砂田。

In this paper， we take the wild field experiment to study the soil bulk density and moisture content of saturated on 0 ~ 40 cm soil in bare field and gravel-mulched field. The result shows that the soil bulk density and moisture content of saturated of bare field and the soil layers have exponent function negative and exponent function positive correlation； the soil bulk density and moisture content of saturated of and the soil layers have exponent function positive and exponent function negative correlation. The average bulk density of bare field than the gravel-mulched field increased by 1.61% and the average moisture content of saturated reduced by 3.82%. Soil bulk density within 0 ~ 30 cm bare field > gravel-mulched field； moisture content of saturated bare field < gravel-mulched field.

S345；S152