助手标题  
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
   林木生产力 在 林业 分类中 的翻译结果: 查询用时:0.084秒
图标索引 在分类学科中查询
所有学科
林业
更多类别查询

图标索引 历史查询
 

林木生产力
相关语句
  tree productivity
    Tree productivity and water production potential in Returning Farmland to Forest Project in Datong County, Qinghai Province
    青海大通退耕还林工程区林木生产力和水分生产潜力研究
短句来源
  tree productivity
    Tree productivity and water production potential in Returning Farmland to Forest Project in Datong County, Qinghai Province
    青海大通退耕还林工程区林木生产力和水分生产潜力研究
短句来源
  “林木生产力”译为未确定词的双语例句
    It is to determine the best soi I conditions of Larix olgensis plantation by researching the relationship of the soil environment conditions to plantation productivity. These index are not only the criterion of choice the best site for Larix olgensis plantation, but also the standard of checking the decline of the current forest productivity.
    通过研究长白落叶松分布区内的土壤环境条件与林木生产力之间的关系,确定培育长白落叶松人工林的最适宜土壤条件,这些指标既是营造长白落叶松人工林立地选择的标准,又是检验现有林立地生产力下降的依据。
短句来源
查询“林木生产力”译词为用户自定义的双语例句

    我想查看译文中含有:的双语例句
例句
为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。
  tree productivity
Higher values of tree productivity combined with lower annual moss productivity were found in sites in northern taiga in comparison with forest-tundra.
      
Recurring cork extraction is a major stress factor and the large water loss from the stripped trunk surface may affect the water balance and tree productivity.
      
To assess the potential impacts on tree productivity, stomatal regulation was investigated in Douglas fir with chronic stomatal occlusion and defoliation from varying levels of the Swiss needle cast (SNC) fungus, Phaeocryptopus gaeumannii.
      
Tree productivity and water potential productivity in returning farmland to forest project in Datong County, Qinghai Province
      
Part 1: Long-term effect on maize, cassava and tree productivity
      
更多          
  tree productivity
Higher values of tree productivity combined with lower annual moss productivity were found in sites in northern taiga in comparison with forest-tundra.
      
Recurring cork extraction is a major stress factor and the large water loss from the stripped trunk surface may affect the water balance and tree productivity.
      
To assess the potential impacts on tree productivity, stomatal regulation was investigated in Douglas fir with chronic stomatal occlusion and defoliation from varying levels of the Swiss needle cast (SNC) fungus, Phaeocryptopus gaeumannii.
      
Tree productivity and water potential productivity in returning farmland to forest project in Datong County, Qinghai Province
      
Part 1: Long-term effect on maize, cassava and tree productivity
      
更多          


The productivity and nutrient cycling of 19- year-old Chinese fir plantations in different site conditions were studied in a small watershed located in Fenyi County, Jiangxi Province. The watershed was divided into three parts: rideg, slope and foot of a hill, for which soil physical and chemical properties were completely different. Significant differences in productivity and nutrient cycling were found under these site conditions. Main conclusion is as follows;1. The tree biomass in ridge,slope and foot,was...

The productivity and nutrient cycling of 19- year-old Chinese fir plantations in different site conditions were studied in a small watershed located in Fenyi County, Jiangxi Province. The watershed was divided into three parts: rideg, slope and foot of a hill, for which soil physical and chemical properties were completely different. Significant differences in productivity and nutrient cycling were found under these site conditions. Main conclusion is as follows;1. The tree biomass in ridge,slope and foot,was 68.337 4 t/ha, 99.162 9t/ha, 141.140 3 t/ha,respectively. The tree biomass at the ridge was 48.4% of that at the foot, and the average individual biomass of the ridge was only 14.95% of that at the foot. That means the ridge is not suitable for the growth of Chinese fir.2. The effect of site condition on growth begins from infant stage(1-4) and arrives the biggest in fast growing stage ( 5~12 ) , then gradually declines.3. The amount and rate of element accumulation, return, absorption and cycling follow the order: ridge's

以江西省分宜县山下林场的杉木人工林为研究对象,分析比较了山脊(包括坡上部)、山坡、山洼(包括坡脚部分)杉木林的生产力和养分循环状况。三种生境条件下的生产力(生物量)依次为68.337、99.163、141.140t/hm~2,山脊的林木生物量仅为山洼的48.4%,林木平均胸径仅为7.8cm(19年生),经济价值很低。此外,由于山脊恶劣的水肥条件,林木各器官中的养分含量、林分养分的吸收和循环均处于较低的水平。集水区的山洼以及坡下部林木的生产力水平较高,达到或接近了杉木中心产区(如湖南、福建)速生丰产林分的生产力水平。养分含量、养分循环速率也较高。研究认为,杉木分布区域中的丘陵地带,多形成独立的或相连的凹形小集水区,集水区之脊、坡、洼三种生境差异显著,在林业生产中应分别对待,坡上部及山脊应种植以保持水土恢复地力为目的的阔叶树种,坡中下部及山洼种植经济价值较高的杉木。

Growth process and differentiation features of Armandi pine trees were studied by method of stem and branch analysis,using destructive sampling. The results show clearly that tree crown expansion goes into rapid growing period after 8 years,getting stationary after 24 year,also its diameter growth,height growth,volunle and biomass turn into rapid growing period after 12 a,10 a,and 16 a,respectly.Stems differentiate fiercely during its rapid growing period,and in this period Armandi pine forests should be tended...

Growth process and differentiation features of Armandi pine trees were studied by method of stem and branch analysis,using destructive sampling. The results show clearly that tree crown expansion goes into rapid growing period after 8 years,getting stationary after 24 year,also its diameter growth,height growth,volunle and biomass turn into rapid growing period after 12 a,10 a,and 16 a,respectly.Stems differentiate fiercely during its rapid growing period,and in this period Armandi pine forests should be tended so that their productivity can be improved.

通过破坏性取样和树干、枝条解析,研究了华山松林木的生长过程和分化特点。结果表明,树冠扩张在8龄以后进入速生期,24龄后逐渐趋于平稳;直径生长在12龄以后进入速生期;高生长在10龄以后进入速生期;材积及生物量在16龄后进入速生期。进入速生期后,林木分化严重,应及时采取抚育措施,以提高华山松林木的生产力。

Radiation, temperature and soil moisture in the forests, the biodiversity and productivity of understory plants, and the growth of trees among 3 thinned 9-year-old Robinia pseudoacacia forests (735 individuals·hm -2 ,1110 individuals·hm -2 , and 1480 individuals·hm -2 ) and non-thinning forest (2220 individuals·hm -2 ) were analyzed comparatively. The results showed that thinning could improve growing condition of trees and understory plants, so that the biodiversity and biomass of understory...

Radiation, temperature and soil moisture in the forests, the biodiversity and productivity of understory plants, and the growth of trees among 3 thinned 9-year-old Robinia pseudoacacia forests (735 individuals·hm -2 ,1110 individuals·hm -2 , and 1480 individuals·hm -2 ) and non-thinning forest (2220 individuals·hm -2 ) were analyzed comparatively. The results showed that thinning could improve growing condition of trees and understory plants, so that the biodiversity and biomass of understory plants and producing ability of trees were increased. When the remaining density was 1110 individuals·hm -2 , the soil moisture was increased by 40% comparing with the non-thinning forest in whole growing seasons. The biodiversity and biomass of understory plants and productivity of trees were increased significantly. If the thinning intensity were increased continuously, the growth of understory plants and trees would reach the maximum and not increase any longer. Therefore, the thinning intensity with remaining density of 1110 individuals·hm -2 was optimum for black locust forest in this region.

通过对 9年生刺槐 (Robiniapseudoacacia)林以 3种不同保留密度进行间伐改造 ,并对其林内光照、温度和土壤水分环境因子以及林下植被层生物多样性、生产力和林冠层林木的生长情况与原林分进行对比分析 .结果表明 ,间伐改造能改善林木及林下植被层生长发育的环境条件 ,促进林下植被层生物多样性和生物产量的提高 ,增加林木的生产能力 .间伐保留密度达到 1110株·hm-2 时 ,在整个生长季 ,林地土壤水分比原林分提高约 40 %,不仅林下植被层的生物多样性和生物量有大幅度提高 ,而且林冠层林木的生产力达到较高水平 ;如果继续加大间伐强度 ,林下植被层和林木个体的生长已达到最大极限 ,将不再提高 .因此 ,1110株·hm-2 左右的保留密度是可考虑的间伐强度 .

 
<< 更多相关文摘    
图标索引 相关查询

 


 
CNKI小工具
在英文学术搜索中查有关林木生产力的内容
在知识搜索中查有关林木生产力的内容
在数字搜索中查有关林木生产力的内容
在概念知识元中查有关林木生产力的内容
在学术趋势中查有关林木生产力的内容
 
 

CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社