江西红壤坡地果园水土保持措施效益之研究

采用 8种不同水土保持处理方式 ,观测江西红壤坡地果园水土流失 ,2年间遇特大降雨 ,观测结果显示 :不同处理有显著之差异。与对照 (全园裸露 )比较 ,水平梯田梯壁植草处理水土保持效果最佳 ,其平均径流率比对照区减少 97.14% ,同时土壤流失量的控制几乎达 10 0 % ,其它各处理也有不同程度防止水土流失效果。据此初步结果 ,建议在坡地果园应实施覆盖作物及敷盖 ,建立土壤植被覆盖率 ,抑制水土流失

Benefits of Soil and Water Conservation Measurement on Orchard Slope Land of Red Soil

Soil and water losses on red soil orchard slopes treated by eight different conservation treatments were assessed. There were significant different effects among these methods. Planting Bahia grass on level bench terrace ridge was the most effective method to preserve soil and water. Compared with bare soil (check), the average runoff ratio is reduced by 97.14% and the dry soil losses decreased by 100% on the grassing surface. Other methods also resulted in some positive effects. It is suggested that growing Bahia grass on orchard slope will improve vegetation coverage and soil conservation.