城市园林公墓中林木的水土保持效益

城市园林公墓的生态建设是我国生态环境整治的重要环节，其核心是造林绿化和水土保持。松柏类乔木是目前我国公墓绿化主要树种，但对它们控制水土流失的生态功能却不十分清楚。本文探讨了园林公幕绿化树木绿蚀控制机制和潜能。研究发现，林木具有缓冲高强 度降雨对土壤的滴溅侵蚀和减少有效降雨的能力，使林下土壤溅蚀量减少了约２０％，土壤流失量降低了４３．２０％，同时，树通过其根系的牵引效应根据际土层的抗滑动能力提高了３

Effect of Trees on Soil Conservation in City Garden Cemetery

Ecological construction of city garden cemetery,which puts stress on reforestry and soil conservation,is an important aspect in environmental improvement in China.Pine and cypress species are currently the main trees used in the construction,but their ecological effect on soil conservation is not quite clear yet.This paper discusses the mechanism and potential of these trees taking the Yunnan Pine as an example.The pine trees were found to be able to curtail the splash detachment of the soil and reduce the effective rainfall.The splash erosion under the forest was reduced by 20%,the soil loss reduced by 43.20%.With their traction effect of the lateral roots of the pine,they increase the sliding resistance of the rooted soil layer by 38.9%,and enbance the tensile strength of the rooted soil by at least 5.8kPa.