density of trees 中文意思是什麼
density of trees
解釋
樹林密度-
The optimum density is difficult to specify in terms of trees per acre.
很難定論究竟每英畝多少株樹為最適密度。 -
Unusually low bird density is due to many years of habitat degradation that has removed trees, eroded soils, and maintained grass - shrub cover over most of the island
不尋常的低鳥類密度是因為多年的生境惡化。島上大部分的地方只維持著草地灌木叢土壤流失和沒有樹木生長的狀態。 -
A forest is an area with a high density of trees ( or, historically, a wooded area set aside for hunting )
森林是樹木密集的地方（以歷史的觀點看，樹木繁多的地方靠近狩獵區） 。 -
The systematic and synthetic description and review of lianas, chiefly in tropic, are described and reviewed in this paper, in which some ecological questions of lianas are included distributed as follows : ( 1 ) the conception and significances of lianas ; ( 2 ) liana flora and its distribution in the world ; ( 3 ) its biological characteristics ; ( 4 ) its ecological characteristics ; ( 5 ) its abundance ( density ) and species - richness in tropical forest ; ( 6 ) the ecological significance of lianas - aggregation in gap and the variance of its abundance in the process of forest succession ; ( 7 ) the relationship between lianas and trees ; ( 8 ) the positive and the negative contribution of lianas to tropical forest ; ( 9 ) the types of climbing mechanism of lianas and its competitive predominance ; ( 10 ) global climate - variance ( co2 increase ) promotes abundance of lianas to increase, and some ecological consequence are resulted from which
摘要對藤本植物（以熱帶為主）研究的動態與發展進行了綜述，其中包括： （ 1 ）藤本植物的概念及重要性； （ 2 ）藤本植物區系和分佈； （ 3 ）藤本植物的生物學特性； （ 4 ）藤本植物的生態學特性； （ 5 ）藤本在森林中的多度（密度）及種的豐富度； （ 6 ）藤本在空地上聚生的生態意義以及它們在森林演進過程中的消長； （ 7 ）藤本與樹木的相互關系； （ 8 ）藤本對森林正面和負面的影響； （ 9 ）藤本的攀援方式類別及其競爭優勢； （ 10 ）全球氣候變化（ co2濃度增高）促進藤本優勢度增長並導致不良的生態後果。 -
Techniques for dwarfing and high - density culture of ' ob - 2t - 47 ' apple trees worked on vigorous rootstocks
藤牧1號蘋果矮化密植栽培技術 -
The trees with thick cutin layer, high stoma density, thick stockade tissue, high ratio of stockade tissue thickness to sponge tissue thickness, and high sedimentation of leaf tissue structure are of greater drought resistance
葉片厚度、尤其是角質層的厚度和海綿組織厚度是評價供試含笑抗旱性的重要解剖指標。 -
Instead of merely estimating the area of forest in each part of the world ( the traditional way of measuring forest cover ), they took into account the volume of timber, the weight of the organic matter and the density of trees to calculate what they dubbed the “ forest identity ”, a measure of the carbon - capturing capacity of forests
他們並不是僅僅估計一下世界各地的森林面積（測量森林覆蓋的傳統手段） ，相反，他們計算木材蓄積量、有機質的重量以及森林的密度以便計算被他們稱為「森林恆等式」的指標，該指標用以測度森林固碳的能力。 -
However the density of trees increased, and at the same time, shrubs density, maxium proportion of tree number of certain dbh range trend to decrease
而喬木密度呈增加趨勢，而灌木密度和喬木樹種的最大株數比例的胸徑范圍呈不斷降低趨勢。 -
The results show that : in the 2 - 4m of road buffer zones and 0 - 10m of infrastrctuer buffer zones, the density of dominant species and biomass will decrease for herbs, and abundance and proportion will get bigger than other exents ( inner species increasing owing to the outer species invading ) ; in the shrub disturbence extent, there exists an inverse relationship between the influence degrees and buffer zones ; in the 40m of infrastructure buffer zones, there has the biggest influence on the trees, however, the effect of road buffer zones is unobvious, only a small change on the morphology
結果表明，草本類，游道影響源干擾區在2 4m ，設施類在0 10m ，原有優勢種密度減小，物種豐度較其它干擾范圍內有所增加（外部種入侵導致本地植物的種類數目增多） ，均勻度也增大，生物量減少；灌木類，在干擾范圍內，影響程度與影響源的距離成負相關關系；喬木類，接近設施類40m處影響最大，游道類影響源則影響效果不明顯，只有形態上略有變化。 -
There existed a certain degree of variation in the radial variation patterns of average ring density among provenances and among individual trees within provenances
不同種源間和種源內株間，年輪平均密度的徑向變異曲線都存在一定的變異，但此變異主要表現在種源內株間。
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