坡度与坡位对工程创面土壤养分状况的影响研究

Effects of Slope Gradient and Position on Soil Nutrients of Wound Surface by Engineering

为探明四川二郎山西坡318国道沿线工程创面生态和土壤修复状况,了解工程创面坡度与坡位对土壤养分状况的影响,用现场调查和工程创面土壤采样、分析测定pH值、有机质等9个指标的方法,进行了相关研究。结果表明,修复15年以上的工程创面土壤养分含量水平总体上还不及自然坡面,养分水平偏低;坡度对创面土壤养分影响较大,35°~40°坡面土壤养有机质、全氮、全磷、碱解氮、速效钾含量均大于40°~45°坡面,35°~40°坡面土壤全钾、有效磷含量则小于40°~45°坡面;坡位对工程创面土壤养分影响则较小。

In order to explore the ecological and soil remediation status of the wound surface by engineering along National Highway 318 on the western slope of the Erlang Mountain,Sichuan Province,the effects of slope gradient and position on soil nutrients was investigated and 9 soil indices of wound surface by engineering were analyzed.The results showed that the contents of soil nutrients on the wound surface by engineering(>15 a)were lower than those on the natural slope and nutrient contents were at low levels.Slope gradient had a great influence on soil nutrients.Contents of soil organic matter(SOM),total nitrogen(TN),total phosphorus(TP),alkali-hydrolyzale nitrogen(AN)and available potassium(AK)were higher at 35°-40°than at 40°-45°slope.The contents of total K(TK)and available P(AP)were lower at 35°-40°than at 40°-45°slope.Slope position had little effects on soil nutrients of destroyed surface by engineering.