1) natural secondary mixed forest
天然次生混交林
2) natural mixed forests
天然混交林
1.
The data used to develop individual models for natural mixed forests were collected from remeasured permanent sample plots Daxing an Mountain and Jilin province(Baihe Forest Bureau and Wangqing Forest Bureau ), northeast China.
本研究以大兴安岭地区和吉林地区天然混交林为研究对象,利用固定样地复测数据,通过分析各主要树种单木直径生长量与其自身大小、竞争和立地条件的关系,找出影响林木生长量的主要因子,并采用逐步回归技术建立了形式简洁、预估良好并便于生产应用的天然混交林各树种与距离无关的单木生长模型。
2.
The data used to develop individual model for natural mixed forests were collected from 712 remeasured permanent sample plots of 10-year periodic from 1990 to 2000 in Baihe Forest Bureau of Changbai mountains, northeat Chian.
本研究以长白山地区白河林业局天然混交林作为研究对象,采用1990年～2000年10年间复测的712块固定样地数据,通过分析各主要树种单木直径生长量与其自身大小、竞争和立地条件的关系,找出影响林木生长量的主要因子,并采用逐步回归技术建立了形式简洁、预估良好并便于生产应用的天然混交林15个树种与距离无关的单木生长模型。
3) secondary forest
天然次生林
1.
Under the similar site condition, the secondary forest and the mixed plantations had greater water conservation function and better maintenance of soil fertility than the pure stands did.
在相同的立地条件下,天然次生林和混交林具有更好的维持地力作用和更高的水源涵养功能。
2.
Aims We studied root morphology across the first five branch orders of 20 hardwood tree species from secondary forest in northeastern China.
该文根据细根分枝等级划分方法,研究了东北帽儿山天然次生林20个阔叶树种1～5级根直径、根长和比根长等形态指标。
4) natural secondary forest
天然次生林
1.
Investigation on natural secondary forest community in Hefei area;
合肥地区天然次生林群落的调查研究
2.
Point pattern analysis of spatial distribution of natural secondary forest populations in mountainous area of Beijing: A case study of Wuling Mountain nature reserve;
北京山区天然次生林种群空间分布的点格局分析——以雾灵山自然保护区为例
3.
Thinning effect on growth status of natural secondary forest;
天然次生林抚育间伐效果
5) Natural secondary forests
天然次生林
1.
Nutrient distribution and accumulation patterns of natural secondary forests on the Loess Plateau of Shanxi Province.;
晋西黄土区天然次生林营养元素分配与积累研究
2.
The carbon density and storage in four types of natural secondary forests are studied,and the results show that: 1) the range of carbon density in different apparatus of natural secondary forests is from 0.
通过对帽儿山林场4类天然次生林碳素密度及储量的比较研究,结果表明:1)天然次生林主要树种不同器官中碳素密度变化范围在0。
3.
The soil water content of different natural secondary forests in eastern mountains of Heilongjiang Province was studied,and the results showed that:①The soil moisture of natural secondary forests in different terrains declined gradually as the soil depth increased;②The soil water contents varied most in the depth of 0～10 cm,up to 20.
对黑龙江省东部山地不同地形天然次生林土壤水分含量进行研究,结果表明:①不同地形天然次生林土壤含水量随土壤深度的增加逐渐减小;②在0~10 cm处各林型土壤平均含水量差异最大,达20。
6) natural mixed stand of conifer and broad-leaved trees
天然针阔混交林
1.
The soil physic-chemical properties of natural mixed stand of conifer and broad-leaved trees in different cutting operation site after 10 years(high intensity,45.
定量分析天然针阔混交林强度择伐、极强度择伐和皆伐10 a后林地土壤理化性质的动态变化,旨在揭示森林土壤采伐前后的养分演变规律,对于减少采伐作业对林地土壤的干扰具有重要意义,同时也为合理选择主伐方式,建立针阔混交林生态采运理论提供科学依据。
2.
The dynamics effects of cutting intensity on the tree layer species composition and diversity of natural mixed stand of conifer and broad-leaved trees (low intensity,13.
1%和皆伐)作业对天然针阔混交林乔木层树种组成及物种多样性的动态影响。
补充资料：常绿阔叶落叶阔叶混交林
出现于亚热带和暖温带的过渡带或亚热带山地常绿阔叶林上界的森林植被类型。由常绿阔叶树和落叶阔叶树混合组成。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条