This paper discussed the distribution of forest resources in the tropics, their main types, main characteristics and present management status, and proposed twelve management modes, and these modes include establishing nature conservation region, eco-public-benefit forest management, extravisme, limiting logging and regeneration after logging, logging three and remaining seven method, tropical shelterwood system, sylviculture douce, whole cultivation method, specialized cultivation method, strip clearcutting method, developing tree species of lacking noted and nature regeneration, closing hillsides to facilitate afforestation.

本文對(duì)世界熱帶地區(qū)的森林資源分布不卡无码av一区二区丝袜、基本類型国产精选永久免费、主要特征免费一级无码婬片av、世界次生林的經(jīng)營現(xiàn)狀和主要經(jīng)營方式討論一级操屄视频。這些經(jīng)營方式包括建立自然保護(hù)區(qū)、生態(tài)公益林經(jīng)營国产精品毛片无码高清、&采掘主義&亚洲美女…黄色wWApp网站毛片、限制采伐和伐后更新、&砍三留七&法国内揄拍国内精品人妻不卡、&扶持&式育林法最新理论在线电影免费网站、&抑制&式育林法、整體培育法玖玖视频免费网址、專門培育法色玖玖精品视频、帶狀皆伐法又爽又大、開發(fā)欠知名樹種黄色.网站免费在线、自然更新和封山育林。

shelterwood method：傘伐法

shelterwood group system ==> 劃法作業(yè) | shelterwood method ==> 傘伐法 | Shenzhen River Catchment ==> 深圳河集水區(qū)

shelterwood method;shelterwood system：傘伐作業(yè)法

速生林作業(yè) free growth management | 傘伐作業(yè)法 shelterwood method;shelterwood system | 異齡混交法;混合林;混交林 highly structured forests