红壤坡地不同水土保持措施降雨入渗规律研究

A Study on the Rule of Rain Infiltration on Red-soil Sloping Land under the Conditions of Different Soil and Water Conservation Measures

以红壤坡地常见的4种不同水土保持措施：净耕果园、坡地果园内横坡耕作、梯田净耕果园和梯田果园内种植百喜草为研究对象，全园裸露区为对照，对不同水土保持措施蓄水能力进行分析。结果表明：不同水土保持措施降雨入渗量动态变化存在差异，依次为：梯壁植百喜草的标准水平梯田区、横坡问种区、梯壁不植百喜草的水平梯田区、柑橘清耕区和裸露对照区。梯壁植百喜草的标准水平梯田可作为优选措施，其保水效益非常可观，渗漏量季节特征明显，主要集中在4～8月，占总入渗量的59．6％。

With 4 common soil and water conservation measures ： clear plough land , contour cultivation, naked level terrace and the level terrace of Bahia - grass rise on red soil sloping land as the study objects, the effects of different soil- and -water conservation measures on water conversation are analyzed, taking naked land as the control . The results showed that the difference in infiltration capacity among different plots is significant compared with the control. The level terrace of Bahia - grass rise 〉 contour cultivation 〉 the naked level terrace 〉 clear plough land 〉 naked land, it showed obviously that the level terrace of Bahia - grass rise should be the optimal measure. Its effect on conserving water is considerable. The infiltration capacity has obvious seasonal characteristics. The percentage of total infiltration capacity reached 59.6% in the period from April to August.