川中丘陵区土地利用变化的生态环境效应——以中国科学院盐亭紫色土农业生态试验站集水区为例

Land Use Change and Effects on Eco-environment in Hilly Area of Central Sichuan Basin

通过长期的观测数据分析与土地利用现状的对比 ,研究四川盆地中部丘陵盐亭紫色土农业生态试验站集水区的土地利用变化及其环境效应。结果表明 ,截流村土地利用自 6 0年代以来发生了巨大变化 ,其中有林地增长约 30 % ,有林地分布在丘陵坡顶、陡坎和地边 ,与农田形成镶嵌格局 ,由此构成的农林复合系统有较好的水土保持能力 ,缓减了农村燃料、饲料、材料和肥料的不足 ,具有良好的生态、社会和经济效应 ,初步实现了生态系统的良性循环。

Long term observation and comparative research were conducted in watershed of Yanting agro-ecological station of purple soil of CAS to analyze land use change and environmental effects. Results showed, land use has been changed a lot since 1965. Forestry land occupied 33% of land area of Jieliu village recently, wherever it occupied only 4% in 1965. The mixed forest with Alnus cremastogyne and Cupressus funebris supplies fuel, fertilizer, fodder and timber. It changes landscape of this village. Forestry lan...