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林木分化
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  tree differentiation
     By means of both asymptotic stable and actual change process of coefficient variation of the diameter(CVD), the compatible CVD model is proposed so as to link three type models (whole stand, size class and individual tree) and better reflect the effect of thinning on forest tree differentiation in the stand.
     为了有利于三大类生长模型的联结,更好地反映间伐对林分中林木分化的影响,依据林分直径变动系数的渐近稳定特性和其在林分间伐后的实际变化过程,提出了相容性的直径变动系数动态模型。
短句来源
  forest tree differentiation
     By means of both asymptotic stable and actual change process of coefficient variation of the diameter(CVD), the compatible CVD model is proposed so as to link three type models (whole stand, size class and individual tree) and better reflect the effect of thinning on forest tree differentiation in the stand.
     为了有利于三大类生长模型的联结,更好地反映间伐对林分中林木分化的影响,依据林分直径变动系数的渐近稳定特性和其在林分间伐后的实际变化过程,提出了相容性的直径变动系数动态模型。
短句来源
  “林木分化”译为未确定词的双语例句
     The kurtosis(K) of two forests(one was-0.64,the other was-0.74) had little distinction and the density factor had little function to forest polarization.
     2种林分直径分布的峰度系数(K)相差不大(分别为-0.64和-0.74),密度因素对林木分化的作用较小。
短句来源
     Natural Differentiation of Trees and Distribution Patterns of Abnormal-growth Trees in Protection Forests in the Guanxi River Valley, Mianyang
     绵阳官溪河流域防护林林木分化及异常木分布格局
短句来源
     The study showed that dominant small-diameter trees in common protection forests of the Guanxi River Valley resulted from the natural differentiation of trees,and especially trees with a diameter of 1 cm to 6 cm were the most,accounting for over 60% of the total individual number in the stand.
     对绵阳官溪河流域常见的几种防护林类型林木分化及异常木分布格局进行了研究。 结果表明,防护林林木分化的结果以小径木占优势,尤以直径1cm~6cm的个体最多,占林分总个体数的60%以上。
短句来源
     On the other hand, the annual litterfall increases with increasing density, and the total accumulation of nutrient elements within litter layer increases also with increasing density.
     本试验目的就在于探明不同密度松树杆材林的生物量、林木分化与产量结构以及不同密度下的生态效应,为确定合理的造林密度和制定疏伐措施提供科学依据。
短句来源
     N and K would promote the differentiation of forest trees while P could make the stand structure unified. The result of partial correlation analysis showed that P was the key factor affecting the growth of P. massoniana . The effectiveness of fertilizer could last for certain a period and had gain sustainability.
     施N、K肥会促进林木分化 ,施P肥则能使林分结构均一 ,经偏相关分析表明 ,P元素是影响马尾松生长的主要因子 ,肥效有一定的时效性和增益持续性。
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  相似匹配句对
     MULTIVARIATE ANALYSIS OF GENETIC DIFFERENTIATION IN FOREST POPULATION
     林木群体遗传分化的多元分析
短句来源
     A Study on the Population Differentiation of Tree pathogenic Fungi
     林木病原真菌的群体分化研究
短句来源
     Estimation for property of forest-crop.
     林木资产评估
短句来源
     Differentiation- of Thymocytes
     胸腺细胞的分化
短句来源
     biauraria branched off, D.
     biauraria的分化 ,D .
短句来源
查询“林木分化”译词为用户自定义的双语例句

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Biomass of 14-year old Masson pine timber stands of different densities (2445—4590 trees/ha) was estimated in the hilly area in central Guangxi Province. The results show that the average biomass of individual trees decreases with increasing density within the range of given densities, Biomass of the stands was highest at Ⅱ density group (3210 trees/ha) on the contrary. On the other hand, the annual litterfall increases with increasing density, and the total accumulation of nutrient elements within litter layer...

Biomass of 14-year old Masson pine timber stands of different densities (2445—4590 trees/ha) was estimated in the hilly area in central Guangxi Province. The results show that the average biomass of individual trees decreases with increasing density within the range of given densities, Biomass of the stands was highest at Ⅱ density group (3210 trees/ha) on the contrary. On the other hand, the annual litterfall increases with increasing density, and the total accumulation of nutrient elements within litter layer increases also with increasing density.

马尾松(Pinus massoniana)是我国松树中分布最广、数量最多的主要用材和薪炭材树种。它具有适应性强、生长快、用途广、造林成本低和易于成林等优点,是我国南方荒山造林的重要先锋树种,其经济意义、环境防护效能及美学价值,都是为人们所公认的。马尾松的干材成长阶段,是林木胸径和树高旺盛生长时期,林木与生长空间的矛盾及树木间的竞争较剧烈,天然整枝、林木分化和自然稀疏都很强烈。如何调节和控制这个时期的立本密度,使其形成合理的群体结构,对于保证林木成熟期的材积生长和取得最大生物量将具有十分重要意义。本试验目的就在于探明不同密度松树杆材林的生物量、林木分化与产量结构以及不同密度下的生态效应,为确定合理的造林密度和制定疏伐措施提供科学依据。

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。

The study results

通过定位观测,对不同密度杉木林的树高、胸径与材积生长规律、林分结构、林木分化和材质的差异;并对不同方式间伐后林分的生长变化,以及不同间伐强度对林地土壤肥力、林下植被种类和数量的影响及其经济效果进行了研究。结果表明:林分密度和间伐强度对杉木树高生长无显著影响,而胸径和单株材积则随着林木株数的增加而减小;林下植被种类、数量和土壤肥力均随着间伐强度的加大而有所增加;中度间伐强度的生长、生态和经济等综合效果最佳。

 
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