【摘要】：基于遂寧水土保持試驗(yàn)站坡耕地2012—2016年次降雨和徑流輸沙數(shù)據(jù),定量分析了自然降雨下植物籬對(duì)坡耕地產(chǎn)流產(chǎn)沙及微地形的影響。結(jié)果表明:植物籬小區(qū)總徑流深是對(duì)照小區(qū)的80%~84%,總沖刷量是對(duì)照小區(qū)的34%~44%,植物籬減沙作用優(yōu)于減流。對(duì)照小區(qū)(Ⅱ小區(qū)和Ⅴ小區(qū))徑流深、沖刷量與平均雨強(qiáng)、降雨量均極顯著相關(guān)(P0.01);植物籬小區(qū)(Ⅰ小區(qū)、Ⅲ小區(qū)和Ⅳ小區(qū))徑流深、沖刷量與平均雨強(qiáng)、降雨量均呈正相關(guān),其中徑流深與降雨量極顯著相關(guān)。各雨型間產(chǎn)流產(chǎn)沙差異不顯著,其中植物籬對(duì)A型雨(大雨強(qiáng)、短歷時(shí))減流減沙效果優(yōu)于B型雨(中雨強(qiáng)、中歷時(shí))和C型雨(小雨強(qiáng)、長歷時(shí))。定植植物籬后,籬帶前出現(xiàn)泥沙淤積帶,15°香根草(Ⅰ小區(qū))、10°香根草(Ⅲ小區(qū))和10°新銀合歡(Ⅳ小區(qū))平均坡度分別演變?yōu)?1.97°,7.73°和7.89°,香根草植物籬的效果較明顯,植物籬使得坡耕地梯田化發(fā)展。
[Abstract]:Based on the rainfall and runoff sediment transport data of slope cultivated land in Suining soil and Water Conservation Test Station from 2012 to 2016, the effects of hedgerow on runoff sediment yield and microtopography of sloping farmland under natural rainfall were quantitatively analyzed. The results showed that the total runoff depth of hedgerow plot was 80% ~ 84% of that of the control plot, and the total scour amount was 34% ~ 44% of that of the control plot, and the sediment reduction effect of hedgerow was better than that of the control plot. The runoff depth and scouring amount were significantly correlated with the average rain intensity and rainfall in the control plot (鈪，

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