forest age meaning in English
林令
Examples
- Econometrics and forest resource evaluation methods are adopted to decide the environmental and timber benefit functions of forest ages
运用计量经济分析和森林资源价值评价方法获得案例点水源涵养林木材效益、环境效益关于林龄的函数。 - 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。 - With increase of artificial forest age , the content of soil organic matter decreased sharply . and soil physical , chemical and biological properties of forest became worsen . from soil physical properties analysis , soil silt , clay , physical clay , aggregate degree and structure coefficient in topsoil increased with increase of artificial forest age and soil sand deceased
在土壤物理性质方面，随着人工云杉林龄的增加，土壤表层粉粒、粘粒、物理性粘粒、团聚度和结构系数降低，砂粒含量增高，土壤饱和持水量、毛管持水量及总孔隙和毛管孔隙在人工云杉演替过程中表现出“ u ”型变化。 - The soil organic content in the topsoil decreased with increase of artificial forest age . because the total n and alkali - hytrolyzable n were from mineralization of soil organic matter , their content in the artificial forest decreased with the decrease of soil organic matter
在土壤化学性质方面，各林地土壤有机质含量表层大于底层，人工云杉林土壤表层有机质含量随着抚育林龄的增加而降低，土壤中全氮、碱解速效氮主要来源于土壤中有机质的矿化，其含量随有机质的减少而降低。