摘要
桐庐县采取分阶段规划,稳步推进定向封山育林,采用人工造林、无林地封育、伐针留阔人工促进、定株抚育间伐封育类型4种主要模式进行定向封育。经过20多年的定向封育,林分质量得到改善,林分的活立木株数比人工造林(补植)增加近50％,针叶林封育可使蓄积量增长33．7％。同时封山育林有利于形成丰富多样的森林植被类型,改善林分结构,增加地表的有机质,从而改良土壤理化性质,改善生态环境。
20 years＇ oriented forest conservation in Tonglu, Zhejiang province by artificial forestation, hillside closing, cutting softwood for broadleaf tree growth and thinning resulted improved forest quality. Meantime, forest conservation could improve vegetation types, stand structure, ground organic matter, soil physiochemical properties and thus improve ecological environment.
出处
《浙江林业科技》
北大核心
2006年第2期62-64,68,共4页
Journal of Zhejiang Forestry Science and Technology
关键词
桐庐
定向封育
技术措施
成效评价
Tonglu
oriented conservation
technique
efficiency
