丹江口库区坡耕地不同植物篱对径流及养分流失的影响初探

通过在丹江口库区坡耕地上不同植物篱种植处理的比较试验,观测分析了不同植物篱处理对径流及养分流失的影响。结果表明,紫穗槐、金银花、黄花菜及龙须草4种植物篱均能有效减少坡耕地上的径流泥沙流失量,径流量由高到低的顺序为CK〉处理②〉处理④〉处理⑤〉处理③。对比各处理小区径流水样养分流失均值可知,全钾〉速效钾〉全氮〉速效氮〉全磷〉速效磷,所有处理中最易随地表流失的养分为全钾和速效钾,速效磷流失量最小。

Preliminary Study on the Effects of Different Hedgerow on the Runoff and Nutrient Loss on Slope Farmland in Danjiankou Reservoir

Based on the comparison experiment on different hedgerow plantson the slope farmland in Danjiankou reservoir,the effects of different hedgerow treatments on the runoff and nutrition loss were observed and analyzed.The results showed that all the four kinds of hedgerow plants including Amorpha fruticosa,honeysuckle,Hemerocallis citrina,and Eulaliopsis binata could reduce effectively the runoff sediment loss amount from slope farmland.Runoff from high to low in the order was CK > treatment ②> treatment ④>treatment ⑤ > treatment ③.Compared with the average water loss of nutrient value,it showed as:TK>rapidly-available K>TN>rapidly-available N>TP> rapidly-available P.TK and rapidly-available K were the most easily loss with the surface erosion,available P loss amount was the minimum.