Through discussing the urban forest connotation, this paper pointed out some existing problems of tree species selection in present urban forest culture, and raised the urban forest culture tree species selection principle.

通過對城市森林內(nèi)涵的探討，指出了當(dāng)前城市森林培育中樹種選擇存在的一些問題91久久精品一区二区三区，提出了城市森林培育樹種選擇的原則久久久精彩视频。

The development strategies were brought forward from multiple categories of forest composition, selection of tree species and their configuration, optimization and reconstruction of stand structure.

該文從多林種、多樹種配置欧美成人aⅴ在线播放，造林樹種選擇和林分結(jié)構(gòu)的優(yōu)化與調(diào)整方面提出現(xiàn)有林的發(fā)展策略，并提供了現(xiàn)有林的經(jīng)營類型和對應(yīng)各種立地類型的造林樹種最新国产AV传媒原创。

It is a must to be solved urgently issue that coordinating the forestry economic and ecological benefits, In this study, the research based on the forest species selection, on the basis of carrying on field investigation to forester in some areas of Hebei Province, analyzed the influence of foresters operating different forest species and factors of influence forest species selection.

內(nèi)容提要林業(yè)經(jīng)濟(jì)效益和生態(tài)效益的協(xié)調(diào)是當(dāng)前林業(yè)發(fā)展亟待解決的問題色中色污网站。以林農(nóng)對林種的選擇為切入點，在實地調(diào)研的基礎(chǔ)上新色a4yy新色综合，分析林農(nóng)經(jīng)營不同林種對協(xié)調(diào)林業(yè)經(jīng)濟(jì)效益和生態(tài)效益產(chǎn)生的影響以及影響林農(nóng)選擇林種的因素不卡毛片日了日操了操。

Introduction: the paper selection of European forest sustainable supply of high quality wood pulp, paper and white durable stability, ultraintense, brightness between the light copper and powder.

簡介：該紙選用歐洲可持續(xù)供應(yīng)森林的優(yōu)質(zhì)木漿制成，紙質(zhì)耐久穩(wěn)定免费观看欧美日韩亚网红在线，超強(qiáng)亮白青春人人摸人人操人人干，亮度介于光銅與亞粉之間。

urban forest ; selection of tree species ; planting trees on the sites best suited ; priority of ecological benefits ; principles

筆者針對這些問題進(jìn)行研究玖玖色综合加勒比在线视频免费精品，以期能提出有效解決這些問題的原則和方法美女高潮黄又色高清视频。1 適地適樹原則[1]在森林培育學(xué)中，適地適樹

selection forest：擇伐林

segment cutting 分段裁切 | selection forest 擇伐林 | selectivity 選擇性

selection forest;plenter-wood：擇伐林

擇伐作業(yè) selection system;single tree selection system | 擇伐林 selection forest;plenter-wood | 環(huán)狀劃伐;帶狀劃伐;帶進(jìn)孔狀傘伐 strip-and-group felling (>)

forest selection system：擇伐作業(yè)體系;擇伐作業(yè)

森林經(jīng)營計劃期;計劃期間;作業(yè)計劃期 planning period;forest management period;working plan ... | 擇伐作業(yè)體系;擇伐作業(yè) forest selection system | 生產(chǎn)期;生產(chǎn)時間;生產(chǎn)性作業(yè)時間 production time;productive ...