摘要
川中丘陵区人多地少,农业开发历史悠久,垦殖指数高.森林覆盖率低,水土流失严重,给农业和生态环境造成了严重的危害。20世纪70年代,四川省盐亭县林山乡率先把桤木(A luns crem astogyne)和柏木(Cup ressusfunebris)混交成功,到80年代末,川中丘陵区营造了大面积的桤柏混交林作为长江上游地区的水土保持林。在过去的30多年里,有关桤柏混交林生态系统的研究较多,主要集中在混交林的机理和模式、群落结构、生态系统的生物量、生产力和物质循环,以及混交林的生态效应。通过对前人的研究的总结,作者剖析了目前桤柏混交林生态系统存在的问题,并指出今后桤柏混交林的研究应该围绕:(1)混交林生态系统的演替规律与演替趋势;(2)生态系统的稳定性;(3)结构和模式的优化改造三个重点。
The hilly areas of central Sichuan located in Yangtse River upriver, with a long agriculture exploitation history and a large population with scarce plowland, high cultivating index and low plant cove：rage. There is serious soll and water loss, damaged agriculture and environment. Since 70＇s in 20th century, Aluns crernastogyne and Cupressus funebris were firstly successfully planted together in Linshan village, Yanting county,Sichuan. At the end of 80＇s,the alder-cypress mixed plantation was extensively planted in the hilly areas of central Sichuan as a part of shield forests of the Yangtse River. A lot of researches were conducted on this plantations in the past 30 years. Researches concentrated on topics of mechanisms and modes of mixed plantat ions,communlty structures, biomass and productivity of ecosystem, material circling and the ecological effects. Based on the analysis of former researches, three research topics on the alder-cypress mixed plantations were put forward： （1） succession and tendency of the alder-cypress mixed plantations, （2） ecosystem stability and （3） structure adjustment and optimization of the mixed plantations.
出处
《水土保持研究》
CSCD
北大核心
2005年第6期4-7,45,共5页
Research of Soil and Water Conservation
基金
中国科学院知识创新工程项目(KZCX3-SW-330)
(KZCX2-SW-319)资金资助
关键词
川中丘陵区
桤柏混交林
生态系统的结构
生态系统的功能
生态效应
the hilly areas of central sichuan
mixed plantation of alder and cypress
ecosystem structures
ecosystem functionsecological effects
