论文部分内容阅读
位于永定河上游的尚义县坝下山区,群山连绵沟壑纵横,沟壑密度3000~5000m/km~2,素有“入山一水一分田”之称。这里水土流失严重,锓蚀模数为5000~10000t/km~2·a,植被稀疏,土地贫瘠,再加上十年九旱的恶劣自然环境,致使农业生产受到制约,农民生活一直处于极度贫困之中。靠山吃山,依水吃水,穷怕了的山区农民终于走出了一条治理荒山、开发沟道,建设经济沟的脱贫致富路。1987年以来,5年建成以果品经济林和用材林为主的经济沟125条,总面积4667hm~2,其
Shangyiyang upstream dam located in the lower reaches of the dam, mountains and continuous gully vertical and horizontal, gully density of 3000 ~ 5000m / km ~ 2, known as “a mountain of water into a field,” said. The soil erosion is serious here, and the eclipse modulus is 5000 ~ 10000t / km ~ 2 · a. The vegetation is sparse and the land is poor. Coupled with the harsh natural environment of nine years of drought, the agricultural production is restricted and the peasants’ life has been in extreme poverty. Among them. Backcountry eating mountains, water and water scarcity, scared mountain farmers finally out of a governance barren hills, the development of channels, the economic ditch to build a poverty-stricken way. Since 1987, five economic ditches with economic forest and timber forest have been built in five years with a total area of 4667 hm ~ 2