查询词典 forest tree
- 与 forest tree 相关的网络例句 [注:此内容来源于网络,仅供参考]
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Populations of evergreen broadleaved forest community was divided into five size classes: seedling, sapling, small tree, middle tree and big tree class by tree's boot diameter and diameter at breast height.
根据树木的地径和胸径,把常绿阔叶林群落种群分为幼苗、幼树、小树、中树和大树等5个大小级。
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The oak tree class forest distributes in our country is very broad, the fruitful in resources, is one of my king monarch sovereign broadleaf tree lumbers, its wooded area accounts for the national forest total area about 12%, stores up the quantity to approximately compose the lumber to store up the quantity 10%.
摘 要:栎类林在我国分布很广,资源丰富,是我国主阔叶树木材之一,其森林面积占全国森林总面积的12%左右,蓄积量约占木材蓄积量的10%。
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7Gm〓 in the 20 yr forest, 1139. 8gm〓 in the 80 yr forest and 912. 4 gm〓 in the climax forest, respectively. However, along with forest succession, the dominant tree species fine root annual production increases, whereas other arboreal and grass fine root annual production decreases.
白桦山杨幼林、白桦山杨成熟林与原始阔叶红松林中,细根年生长量分别为712.7gm〓、1139.8gm〓和912.4gm〓;但是,随着演替的进行,林地主要树种细根的年生产量会逐渐增加,其它木本和草本细根的年生产量则逐渐降低。
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The forest was characterized with phanerophyte evergreen plants with single-mesophyll-leathery leaves, which reflected the nature of tropical Karst mountainous seasonal rain forest.(2). Community succession was divided into five stages by using Cluster method, PCA method; the succesion stages include herbaceous stage, scrub-shrub stage, small tree stage, arbor stage and climax seasonal rain forest stage.(3). Based on similarity theory, succession sere was constructed with the community similarity equation formed.
结果表明:(1)森林群落在外貌上,以常绿高位芽、单叶、革质、中型叶植物为主,反映了热带岩溶山地季雨林的特点;(2)运用聚类分析、PCA排序等方法将群落演替阶段划分为草本群落阶段、灌丛阶段、小乔木阶段、乔林阶段、顶极季雨林阶段;(3)运用相似学原理,组建群落间相似度方程并以此方程构建了群落演替系列;(4)研究表明桂西南岩溶区生态系统健康受到严重胁迫。
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Rich hill, the originalzhe tian bi ri covered with secondary forest in Chinese pine, Pinus sylvestris, lacquer tree, chestnut tree, such as dozens of valuable trees, and the acres of wild tea Phillyrin forest, there Changium, Danshen , Astragalus, Bupleurum, Polygonum multiflorum materials, such as more than 200 kinds of Chinese herbal medicine.
山上物产丰富,遮天蔽日的原始次生林中长满了油松、樟子松、漆树、板栗树等几十种珍贵的树木,有上千亩野生连翘茶林,有党参、丹参、黄芪、柴胡、何首乌等二百多种中草药材。
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Among the environmental factors,temperature nearly make the same effect toall the tree species of broad leaf korean pine forest.Moisture and fertility of soil aregreatly depend on the soil type.In the broad leaf korean pine forest zone,humus darkbrown soil has the best condition of moisture and fertility,The following are typicaldark brown soil、flood and forest soil;the third is albic brown soil and meadow soil;The worst ones are skeleton brown soil and marshy soil.
在影响树木生长的环境因子中,温度对所有树木的影响几乎相同,土壤的水肥因子是与土壤类型相关性很大的量,不同的土壤类型,水肥条件相差极大,在长白山阔叶红松林带,土壤水肥条件最好的是腐殖质暗棕壤,其次是典型暗棕壤和河滩森林土,土壤水肥条件一般的是草甸土和潜育暗棕壤,水肥条件最差的是粗骨棕壤和沼泽土。
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Undesirable structure and tree species simpleness etc are main problem in existing urban forest, influence urban forest effective exert its zoological function(2) urban forest landscape indexes show: urban forest fragment increased form 1985 to 1995, and decreased form 1995 to 2007, but as a whole, Beijing urban forest fragment is degressive, especially woodland and spinney land.
2在研究时段内北京市城市森林景观指数变化明显,从1985-1995年间破碎化程度增加,而1995-2007年间下降,1985-2007年总体呈下降趋势,其中有林地和灌木林两种主要城市森林用地类型的变化剧烈;城市森林尤其是有林地用地受到人为干扰影响强烈,斑块日益简单化,主要类型城市森林间相互转化现象严重,说明北京市城市森林在研究时段内发生了很大变化。
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The secondary forest breeding use birds nest-site resources vertically, they can be divided into nesting in tree coronal layer guild, nesting on tree trunk guild, nestig in the under forest layer guild.
次生林繁殖鸟类对巢址资源呈现空间上的垂直利用现象,可分为树冠层营巢、树干上营巢和林下层营巢繁殖集团。
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It was put forward to establishing forest environment that was mainly composed of tree in city and town, and combining the forest network and river network together. In the meanwhile, the functions in caring human health and improving environment were emphasized in each sector including selection, introduce and distribution of tree species et al. The main purpose was to regard the interests of human as of prime importance.
提出了建设以乔木为主体的城市森林环境,林网化与水网化相结合,在植物材料选择、引进及配置的各个环节上注重人体保健功能和改善环境作用,充分体现以人为本的建设宗旨。
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Many tree species at the same time and solve the spatial heterogeneity which empirical method could not achieve. Therefore, the assessment method could be applied in the selection of species for afforestation or species selection in the forest restoration areas.From collecting the attributes of planting species, spatial distribution data and environmental factors, we could integrate and analyze the data for further simulating the forest dynamics of forest in Taiwan. The impact of global change on forest also could be evaluated.
应用生育地因子评估树种之生态地位,能解决统计实证方法在空间异质性使用的限制,并可同时评估多种树种,因此可应用在造林树种之选择,亦可应用於崩塌地复育造林树种之选择,以及林相改良造林树种之选择,在收集更多树种属性与空间分布资料后,配合此评估方法,未来更可模拟出台湾森林之动态,以及评估环境变迁对台湾森林所造成的影响。
- 推荐网络例句
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But we don't care about Battlegrounds.
但我们并不在乎沙场中的显露。
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Ah! don't mention it, the butcher's shop is a horror.
啊!不用提了。提到肉,真是糟透了。
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Tristan, I have nowhere to send this letter and no reason to believe you wish to receive it.
Tristan ,我不知道把这信寄到哪里,也不知道你是否想收到它。