摘要
利用调查与观测资料分析川中丘陵典型区土地利用变化与耕地演替及其对农业生态系统的影响。结果表明,川中丘陵区土地利用结构在近30a内发生了巨大变化,尤其林地与旱耕地的消长促发了农业生态系统结构的演替,导致农林复合生态系统的形成,同时农田生态系统结构趋于复杂,随着施肥、水土保持等农田管理技术的进步,以土壤侵蚀为主的土地退化得到有效控制,农作物产量大幅增长,水稻、玉米、小麦、油菜单产分别较建国初期增长约2～5培,农业生态系统呈正向演替趋势。
Land use change and cropland succession and impacts on agroecosystem were analyzed on investigation and observation data Results showed that land use in the hilly area of the central Sichuan Basin have been changed a lot since 1960sIncrease of forestry land and decrease of cropland resulted in structure change of agroecosystem and formation of agroforestry ecosystem Meanwhile, structure of farm ecosystem trended to be complex As improvement of management techniques on soil conservation and fertilization, crop yields increase sharply and soil erosion and environment degradation has got controlled Agroecosystem is tending to be stable and high productive
出处
《山地学报》
CSCD
2003年第1期56-62,共7页
Mountain Research
基金
中国科学院知识创新项目(KZCX3-SW-330)(KZCX2-SW-319)
四川省青年基金项目资助~~
