红壤坡地不同水土保持措施降雨入渗规律研究

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、横坡间种区、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%。

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

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.