crown density中文什么意思

郁闭度。

• crown:    n. 1.(胜利的)花冠；荣誉；〔美 ...
• density:    n. 1.稠密；浓厚。 2.【物理学 ...
• density of crown cover:    林冠疏密度

例句与用法

1. Quickly accurate determination method of forest land crown density based on arcview gis
   支持下的林地郁闭度的快速精确测定方法
2. The results showed that plant height , crown breadth , leaf number , leaf breadth and sporophyll number of dryopteris crassirhizoma populations were influenced by forest crown density and light condition
   结果表明：林分郁闭度和光照条件显著影响粗茎鳞毛蕨种群的株高、冠幅、叶片数量、叶片宽度、孢子叶数等形态指标。
3. Russula subnigricans hongo grows fast after shower in the later summer and early autumn when it was hot . they emerged in the forest stand in which crown density was 0 . 9 or so . soil ph was 5 . 75 , and fagaceae species dominated
   每年在夏末秋初高温阵雨之后为发生盛期。发生地林间郁闭度0 . 9左右，土壤ph值5 . 75 ，其共生树种以壳斗科为主。
4. According to the law of different forest stand can arise different forest fire , based on the existing forest distribution at the badaling forestry center , the area percentage of different forest types , forest age , crown density and slope for each sub - compartment were analyzed , and based on the different characteristics of each sub - compartment , some rational methods of fire prevention were put forward
   摘要本论文基于不同的林分能引起不同的林火特性规律，针对北京八达岭林场林分状况，统计分析了各林班不同林分类型、林龄、郁闭度、坡度的面积分布百分比，根据不同林班林分特点，提出了合理的营林防火措施。