摘要
以纸坊沟流域多年土地利用监测数据为基础 ,对其结果进行分析和讨论。结果表明 ,到 1 999年底 ,农业、林业、牧业用地面积比例分别为 1 6.9%、34.0 %、36.8%。人均基本农田由 1 975年 0 .0 5 4 7hm2 ,增到 1 999年的 0 .2 0 33hm2 ,坡耕地大幅度减少 ,粮食平均产量也由 1 975年的 5 61 kg/hm2 ,增到 1 999年的 2 31 9kg/hm2 ,流域林草有效覆盖率达到 5 7.4% ,植物种类和数量得到增加。
The results of dynamic monitoring landuse of Zhifanggou watershed for over 60 years were analyzed and disussed. The monitoring results showed that proportions of the land used for harvesting, growing forest and grazing were respectively 16.9%, 34.0% and 36.8% in the end of 1999. The basic farmland per capita in 1999 reached to 0.2033 hm 2, while it was 0.0547 hm 2 in 1975, as well as average product of grain, from 561 kilogram per hectare in 1975, to 2 319 kilogram per hectare in 1999. The area of slop arable land was decreased by a big margin and the types and the amount of flora in the watershed were increased, the effective coverage reached to 57.4%. Furthermore, the practice of comprehensive control proved that further improving the education level of the villagers, greatly extending the technology of increasing the output in arid land, and building up the consciousness of ecosystem in villagers, were the best way to strengthening what we had gotten before and ensuring the fine developing trend of the watershed environment.\;
出处
《干旱地区农业研究》
CSCD
北大核心
2001年第4期115-121,共7页
Agricultural Research in the Arid Areas
基金
中国科学院知识创新工程项目"区域水土保持环境效应与生态环境建设对策"( KZCX1 -1 0 -0 4 -0 1 )与"区域水土流失宏观分析"( 99-0 1 -0 5 )
