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secondary hardwood
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  “secondary hardwood”译为未确定词的双语例句
     Preliminary Report on Transformation of Secondary Hardwood Forest into Mushroom Forest
     残次阔叶林改造为菇木林试验初报
短句来源
     SPATIAL PATTERN OF MANCHURIAN ASH SEED DISPERSAL IN SECONDARY HARDWOOD FORESTS
     天然次生林中水曲柳种子的扩散格局
短句来源
     THE SPATIAL PATTERN AND PROCESS OF SEED BANK OF FRAXINUS MANDSHURICA IN SECONDARY HARDWOOD FORESTS
     天然次生林中水曲柳种子库的空间格局与过程
短句来源
     The connotation of eco-forestry includes many comprehensive methods oftransforming mountains such as to close hillsides to facilitate secondary hardwood forest,to develop space forest, to promote natural regeneration artificially, to preserve shrubs andcoppices on top of mountain, and to develop utilization of forest products and etc.
     其内涵包括:封管好次生阔叶林、发展立体林、人工促进天然更新、保护山顶灌丛和矮林以及林内产品的开发利用的综合治山方法。
短句来源
  相似匹配句对
     Preliminary Report on Transformation of Secondary Hardwood Forest into Mushroom Forest
     残次阔叶林改造为菇木林试验初报
短句来源
     Secondary cut
     二次掏槽
短句来源
     On the secondary spectrum
     关于二级光谱问题的探讨
短句来源
     SPATIAL PATTERN OF MANCHURIAN ASH SEED DISPERSAL IN SECONDARY HARDWOOD FORESTS
     天然次生林中水曲柳种子的扩散格局
短句来源
     Study on Hardwood of Explosion Pulping
     硬木爆破法制浆的研究
短句来源
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  secondary hardwood
The spatial pattern of the crown spread ofQuercus glauca in a hardwood community was investigated in order to consider the effect of the patterns on its survival in a secondary hardwood community.
      


In this article, it is expounded from the view of Linan County (an experim-ental unit of eco-forestry) that the aim of developing forestry production and enlarging for-est area is not to merely obtain timber from forest, but to strive for ecological balance, tobrong benefit to human beings, to keep good human environment and let the human beingsbe flourishing. The connotation of eco-forestry includes many comprehensive methods oftransforming mountains such as to close hillsides to facilitate secondary hardwood...

In this article, it is expounded from the view of Linan County (an experim-ental unit of eco-forestry) that the aim of developing forestry production and enlarging for-est area is not to merely obtain timber from forest, but to strive for ecological balance, tobrong benefit to human beings, to keep good human environment and let the human beingsbe flourishing. The connotation of eco-forestry includes many comprehensive methods oftransforming mountains such as to close hillsides to facilitate secondary hardwood forest,to develop space forest, to promote natural regeneration artificially, to preserve shrubs andcoppices on top of mountain, and to develop utilization of forest products and etc.

以一个生态林业的试点,阐述了发展林业生产,扩大森林面积的目的不是单纯要得到木材,而是谋求生态系统平衡,造福于人类,保证人类良好的生存环境,使人类兴旺发达。其内涵包括:封管好次生阔叶林、发展立体林、人工促进天然更新、保护山顶灌丛和矮林以及林内产品的开发利用的综合治山方法。

Zhongshan mountain is located on the south shore of lower reaches of Yangze river.According to vegetation division of China (Wu Zhenyi,1980),it belongs to the northern part of subtropical region.The types of forest vegetation have transitional character from evergreen broad leaved forest in subtropical zone to deciduous broad leaved forest in the temperate zone.Artificial pine forest is still dominant element in part area of Zhongshan mountain.Present vegetation of Zhongshan mountain is strongly disturbed...

Zhongshan mountain is located on the south shore of lower reaches of Yangze river.According to vegetation division of China (Wu Zhenyi,1980),it belongs to the northern part of subtropical region.The types of forest vegetation have transitional character from evergreen broad leaved forest in subtropical zone to deciduous broad leaved forest in the temperate zone.Artificial pine forest is still dominant element in part area of Zhongshan mountain.Present vegetation of Zhongshan mountain is strongly disturbed by human activity,and also in an active stage of successional change.On the one hand,natural secondary hardwood stands such as Liquidambar formosana and Quecus variabilis are developing and becoming prominent elements in the forest.On the other hand,evergreen trees such as Castanopsis sclerophylla, Ilex purpurea and Photinia serrulata etc.are evidently increasing in the forest. I.purperea and C.sclerphylla have become subdominant elements in some local area(Table 1,2).Cultivated tests show that many evergreen trees such as Cinnamomum chekiangensis,Cyclobalanopsis glauca,Lithocarpus glaber,Distylium myicodies,Acer cinnamomifolium etc.grew well in Zhongshan area(Table 3,4).Some of the species can well regenerate in this area.It was considered that the evergreen and deciduous broadleaved mixed forest including Cyclobalanopsis glauca,Lithocarpus glaber,Castanopsis sclerophylla,Phoebe hunanensis,Cinnamoum chckiangcnsis and C.comphora etc.can be rebuilt in the local area of Zhongshan mountain.

紫金山地处长江下游南岸,按中国植被区划,从属于亚热带北缘,其森林植被类型具有亚热带常绿阔叶林向暖温带落叶阔叶林过渡的特征。从紫金山现状植被来看,具有明显人为扰动痕迹,虽然人工针叶林仍占有重要地位,但现状植被正处于明显的演替之中。一方面,以马尾松(Pinusmasoniana)为优势的阳性针叶林已处于日益衰退境地;另一方面,以栓皮栎、枫香为优势的天然次生落叶阔叶林正在迅速恢复,而苦槠(Castanopsissclerophyla)、冬青(Ilexpurpurea)、石楠(Photiniaserulata)等常绿阔叶树种在林中明显增多,在局部区域,冬青、苦槠已成为群落中的亚优势种。从引种试验结果来看,诸如浙江桂(Cinnamomumchekiangense)、青冈(Cyclobalanopsisglauca)、石栎(Lithocarpusglaber)、杨梅叶蚊母树(Distyliummyricoides)、樟叶槭(Acercinnamomifolius)等数十种常绿成分,在紫金山露天栽培,生长良好,不少种类已具有天然更新能力。作者认为,如果不再受人为破坏,在紫金山水土条件好的山腰和山麓的地段,可以建立包含青冈?

The main study site is in Wuying forest area of Northeast China. Based on the analysis of structure features and dynamic changes of the Broadleaved Korean pine forests and its secondary forest types, this paper studied the restoration ways for the degraded forest ecosystem and sustainable management. Broadleaved Korean pine forest is the most typical and stable vegetation type of the region, but its area and stocking have been decreased over the whole distributing regions owing to the long term over cuttings...

The main study site is in Wuying forest area of Northeast China. Based on the analysis of structure features and dynamic changes of the Broadleaved Korean pine forests and its secondary forest types, this paper studied the restoration ways for the degraded forest ecosystem and sustainable management. Broadleaved Korean pine forest is the most typical and stable vegetation type of the region, but its area and stocking have been decreased over the whole distributing regions owing to the long term over cuttings since recent 50 years. Broadleaved Korean pine forest is the zonal vegetation type. It keeps stable through the generation replacement of the different aged trees and the succession between different species. Conservation should be a better way for the management of this kind of forest. The secondary hardwood forest was formed after the cutting or fire of the virgin Broadleaved Korean pine forest. It is less stable, especially the pure forest type dominated by only one species is degrading seriously under the natural condition. So the restoration should be considered in the management. The secondary popular and birch forest is the pioneer community after the Broadleaved Korean pine forest. But it is simple in composition and unstable in structure. Restoration and rehabilitation should be considered when the forest is managed. In short, the forest structure must be adjusted in order to restore the degraded ecosystem and to manage the forest sustainably.

该文以黑龙江五营林区为主要对象 ,通过对阔叶红松林及其次生类型结构特征和动态变化的分析 ,研究退化生态系统的恢复途径和可持续经营措施 .阔叶红松林是小兴安岭地区最典型和最稳定的植被类型 ,但其面积和蓄积都在迅速减少 ,显著的特性是通过优势树种红松的世代更替及其与阔叶树种的相互更替 ,维持群落的周期性波动和稳定结构 ,经营上应采取保护措施 .硬阔叶林是阔叶红松林破坏后所形成的次生林 ,在一些地区成为杨桦林向阔叶红松林恢复的中间途径 ,具有广泛的代表性 .次生硬阔叶林稳定性小 ,尤其是那些由硬阔叶树形成的纯林更是生长速度慢 ,更新不良 ,结构不合理 ,必须采取有效的恢复途径 ,减缓退化 ,实现可持续经营 .杨桦林是最典型的次生软阔叶林 ,具有十分广泛的分布 .杨树和桦树都是生长速度快的强阳性树种 ,阔叶红松林一经破坏 ,它们首先占据采伐和火烧迹地 ,迅速成林 .然而 ,这些树种材质不良 ,群落结构单一 ,生产力低下 ,极易被其它树种所代替 ,所以要迅速调整杨桦林结构 ,采取恢复和重建措施 ,发展阔叶红松林 .至于非地带性植被云冷杉林和落叶松林等采取维持措施 ,保证生态系统的稳定与平衡

 
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