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young and middle aged forest
相关语句
  “young and middle aged forest”译为未确定词的双语例句
     Principle and Methods for Tending Thinning of Secondary Young and Middle Aged Forest in Xiaoxing′an Mountains
     小兴安岭天然次生幼壮林抚育的基本原则和主要方法
短句来源
  相似匹配句对
     YOUNG W.
     YOUNG W.
短句来源
     Young inequality.
     Young不等式形式的内在统一性和数学思维的严密性。
短句来源
     Young and Old
     青春与暮年
短句来源
     Young and L.Kantorovitch.
     Kantorovitch等人的影响。
短句来源
     In the Middle
     人在中途
短句来源
查询“young and middle aged forest”译词为用户自定义的双语例句

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The combined method of sampling control and subcompartment investigation was used. The statistic and analytic results on 103 square permanent plots (0.06 hm2 for each plot),322 sample trees for determining height and 36 analysis trees showed that the total growing stock of Hushan Forest Farm was 89763 cubic metres, annual growth rate 20.48 per cent, with the young and middle-aged forests as its majority.

以林场为总体,采用抽样控制和小班调查相结合的方法,调查了103个面积为0.06hm~2的正方形固定样地、322株测高样木和36株平均解析木。结果表明:湖山林场现有森林资源总蓄积量为89736m~3,年总生长率20.48%,以中幼林为主。

In the paper using canopy structure divided conditions,stand origin storey age and species composition factors, the young and middle-aged forest in Sonjianghe Forest region were divided into 4 forest groups and 9 types of forest. A forest canopy typical table for young and middie-aged forests was drawn up. It can be used to guid the invetory design and thinning in the young and middle-aged forests. This target management...

In the paper using canopy structure divided conditions,stand origin storey age and species composition factors, the young and middle-aged forest in Sonjianghe Forest region were divided into 4 forest groups and 9 types of forest. A forest canopy typical table for young and middie-aged forests was drawn up. It can be used to guid the invetory design and thinning in the young and middle-aged forests. This target management technical link is easy to master and efficient to improve the quality of thinning.

本文利用林层结构划分条件、林分起源、林层年龄、树种组成等因子,将松江河林区的幼、中龄林划分为四个林相组和九个林相类型。在此基础上编制了幼、中龄林林相类型表。用该表能指导幼、中龄林的调查、设计和抚育间伐。该目标管理技术环节易于掌握,并可提高抚育质量。

Based on the succession law of broad-leaved Korean pine forest, the basic principle of tending thinning to secondary young and middle aged forest is to speed up the recovering of broad-leaved Korean pine forest The main methods are: (1) thinning broad-leaved trees and protecting conifer trees to natural secondary young and middle aged forest with midiate-high-density; (2)planting conifer(strip, stretch shape or planting group) and thinning broad-leaved trees to that with lower density; (3)...

Based on the succession law of broad-leaved Korean pine forest, the basic principle of tending thinning to secondary young and middle aged forest is to speed up the recovering of broad-leaved Korean pine forest The main methods are: (1) thinning broad-leaved trees and protecting conifer trees to natural secondary young and middle aged forest with midiate-high-density; (2)planting conifer(strip, stretch shape or planting group) and thinning broad-leaved trees to that with lower density; (3) calculating the average distance between remaining trees by means of square disposition according to the tree number of different species and diameter which must be kept The calculation of average distance between trees can be used to control stand density

根据红松阔叶林的演替规律,提出了小兴安岭天然次生幼壮林抚育的基本原则是加速恢复红松阔叶林。主要方法是在一个林型组内,对中高密度天然次生幼壮林进行抚阔保针或抚阔补针,对低密度天然次生幼壮林进行栽针(带状、团状、植生组)抚阔;按照森林抚育技术规程每公顷不同树种直径级必须保留的林木株数,用正方形图式配置法计算平均株间距离,并以此调控林分密度。

 
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