论文部分内容阅读
为了进行水土保持生物措施的合理配置,因地制宜地治理贵州喀斯特地区的水土流失,通过野外径流小区观测试验,对贵州喀斯特地区不同生物措施的水土保持效果进行了研究。结果表明,各种生物措施的水土保持效果为经济林>人工草地>水保林,其中,经济林措施中梨树>桃树>板栗,人工草地措施中黑麦草>白三叶,水保林措施中杨树与墨西哥柏混交林>墨西哥柏>杨树。与撂荒坡耕地相比,经济林(梨树)的保土效果和保水效果均比较好,而香樟、柏树、马尾松等水保林在坡度较陡时不具备保水效果。
In order to rationally allocate soil and water conservation biological measures, soil and water loss in Guizhou Karst area is managed according to local conditions. Soil and water conservation effects of different biological measures in Guizhou Karst area are studied through field runoff observation experiments. The results showed that the effects of various biological measures on water and soil conservation were economic forest> artificial grassland> water conservation forest, among which, economic forest measures were pears> peach trees> chestnut, artificial grassland ryegrass> white clover, Poplar and Mexican cypress mixed forest> Mexican cypress> poplar. Compared with abandoned farmland, the economical forest (pear tree) had better soil holding effect and water retention effect, while the water-forest forest such as camphor tree, cypress tree and masson pine tree did not have water retention effect when steep slope.