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forest accumulation
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  “forest accumulation”译为未确定词的双语例句
     Indexes that influencebenefits of Gansu natural forest reserves protection project were mainly artificial forest acreage, artificial forest accumulation, forest land acreage, natural productivity and coefficient of forestsystem productivity.
     结果表明,对甘肃省天然林资源保护工程效益影响较大的指标主要有:人工林面积、人工林蓄积、有林地面积、自然生产力和林业系统生产力指数。
短句来源
  相似匹配句对
     forest .
     林。
短句来源
     THE ACCUMULATION AND CIRCULATION OF NUTRIENT ELEMENT IN PAULOWNIA FOREST
     泡桐林营养元素的积累和循环
短句来源
     Forest of Ababaik
     阿巴白克的森林
短句来源
     Accumulation and distribution;
     积累与分配的关系;
短句来源
     Research on the Net Productivity and Nutrient Accumulation of the Natural Forest of Populus
     五台青杨天然林净生产力与营养元素积累的研究
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In this paper, based on main factor analysis, benefits on natural forest reservesprotection project of Gansu province were comprehensively analyzed. Indexes that influencebenefits of Gansu natural forest reserves protection project were mainly artificial forest acreage, artificial forest accumulation, forest land acreage, natural productivity and coefficient of forestsystem productivity. From the point of benefits in natural forest reserves protection project, the best region is Qingyang and...

In this paper, based on main factor analysis, benefits on natural forest reservesprotection project of Gansu province were comprehensively analyzed. Indexes that influencebenefits of Gansu natural forest reserves protection project were mainly artificial forest acreage, artificial forest accumulation, forest land acreage, natural productivity and coefficient of forestsystem productivity. From the point of benefits in natural forest reserves protection project, the best region is Qingyang and the worst is Lanzhou. Differences on benefits of natural forestreserves protection project of Gansu province were reflected and important theory basis for the government and forest departments to make regulation and laws were provided.

利用主成分分析法,对甘肃省65个县区天然林资源保护工程的效益进行了综合分析。结果表明,对甘肃省天然林资源保护工程效益影响较大的指标主要有:人工林面积、人工林蓄积、有林地面积、自然生产力和林业系统生产力指数。天然林资源保护工程效益最佳的是庆阳和平凉两地区,最差的是兰州地区。综合评价结果较准确地反映了甘肃省各县区天然林资源保护工程效益的大小,将为政府和林业部门制定相关法规和政策提供重要的理论依据。

The nutrient cycle in three types of standing density of planeseeding Pinus massoniana of Hunan Province was studied in this paper. The results show that the nutrient contents are the highest of degree in leaves and lowest in stems; that the contents of N、K and Ca are higher than those of P、Mg as to macroelements; that the content of Mn is the highest and Cu the lowest as to microelements; that nutrient accumulation of individual trees decreases with the increase of the standing density and low density...

The nutrient cycle in three types of standing density of planeseeding Pinus massoniana of Hunan Province was studied in this paper. The results show that the nutrient contents are the highest of degree in leaves and lowest in stems; that the contents of N、K and Ca are higher than those of P、Mg as to macroelements; that the content of Mn is the highest and Cu the lowest as to microelements; that nutrient accumulation of individual trees decreases with the increase of the standing density and low density forests' accumulation is respectively 2.75 and 4.04 times as much as that of medium density and high density; that in differentdensity plantations, the amount of nutrient accumulation is in the sequence of N>K、Ca>Mg>P>Mn>Fe>Zn>Cu; and that with the density increasing, nutrient accumulation quantities of arbor layer would increase, but opposite is the ground layer. The results also show that annual net accumulation increases with the increase of the standing density; that among various elements, N's annual net accumulation is the highest and Cu's the lowest; and that every element's absorption and preservation will increase when the stand density is added; however, the cycling velocity of nutrient elements will slow down and the cycling velocity of macroelements is faster than that of microelements.

 对湖南省3种不同密度类型的马尾松飞播林分的养分循环进行了研究.结果表明:各组分营养元素的含量均以树叶最高,树干最低,在各组分中大量元素以N、K、Ca的含量较高,而P和Mg的含量较低;微量元素以Mn的含量为最高,Cu的含量为最低.单株林木营养元素的积累量随着林分密度的增大而减小,低密度林分营养元素积累量分别是中密度、高密度林分的2.75倍和4.04倍.不同密度单株林木各营养元素积累量依次为N>K、Ca>Mg>P>Mn>Fe>Zn>Cu.随着林分密度的增加,乔木层营养元素的积累量逐渐增大,地被层所积累的营养元素量有减少的趋势.林分年净积累量随着林分密度的增加而增加,各元素的净积累量以N最大,Cu最小.各种元素的吸收量、存留量都随着林分密度的增大而增大.营养元素的循环速率也因林分密度的增大而逐渐变小,并且大量元素的循环速率要高于微量元素.

In order to survey the tree height quickly and accurately, this thesis makes a research on the estimate of Cunninghamia lanceolata (Lamb.) Hook. tree height by adopting the regression equation based on the diameter breast height of fallen C. lanceolata , absolute taper and tree height. The test result shows that the precision of estimate is more than 94.8% and the systematic error is within 0.08%. The adoption of tree height estimate method can also raise the measure precision of forest accumulation...

In order to survey the tree height quickly and accurately, this thesis makes a research on the estimate of Cunninghamia lanceolata (Lamb.) Hook. tree height by adopting the regression equation based on the diameter breast height of fallen C. lanceolata , absolute taper and tree height. The test result shows that the precision of estimate is more than 94.8% and the systematic error is within 0.08%. The adoption of tree height estimate method can also raise the measure precision of forest accumulation and reduce the design error of outturn.

为快捷、准确测定杉木树高 ,采用伐倒木的胸径、绝对削度 ,建立这两个因子与树高的回归方程 ,以估测树高。试验结果表明 ,树高估测精度为 94 .8%以上 ,系统误差在 0 .0 8%以内。采用树高估测法 ,还能提高林木蓄积的测定精度 ,减少出材量的设计误差

 
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