论文部分内容阅读
留车水土保持管理站自1986年起,用国外松、南岭黄檀、胡枝子和草种,在“小老头”马尾松林下营造乔灌草复合群落,治理水土流失,经过四年的实践,取得了明显的经济效益和生态效益。一、乔灌草组合试验试验地设在雁洋村屋附近和公路两旁,海拔约300米,红壤.土层较松厚,中度侵蚀。公路一侧较平坦,另一侧坡度1 5—25°。小老头马尾松1600—3200株/公顷,植被很少。1986—89年共造林种草1457亩,其中乔灌草777亩,马唐草1 60亩,象草5亩,南岭黄檀5亩,湿地松
Left car soil and water conservancy management station since 1986, with the pine, Nanling Dalbergia, Lespedeza and grass, in the “old man” Pinus massoniana afforestation complex to create community, control soil and water loss, after four years The practice has achieved obvious economic and ecological benefits. First, the experimental combination of grass and shrubs and grass is located in Yan Yang village housing estates and roads on both sides of about 300 meters above sea level, red soil. Soil thicker, moderate erosion. The side of the road is flatter and the slope on the other side is 1 5-25 °. Pinus massoniana 1600-3200 plants / hectare, vegetation is very small. 1986-89 a total of 1457 acres of afforestation grass, of which 777 acres of grass and shrubs, crabgrass 1 60 acres, 5 acres of grass, yellow sandalwood 5 acres,