To investigate variation of soil bacteria community in response to the change in the above-ground vegetation, soil samples were collected at three sites, i.e. bamboo groves, mixture of bamboo and broadleaf tree and broadleaf forest. To explore variation of the soil bacterial structure, 16S-rDNA-V3-fragment-base DGGE (denaturing gradient gel electrophoresis) and clone sequence BLAST technologies were applied.

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Also it synthesize the natural law on vegetation distribution and the present situation on urban forestry construction to define the main proportion on urban species actually:the proportion between aiphyllus tree and deciduous tree is 3:7; the proportion between arbor and shrub is 2:1; the proportion between coniferous tree and broadleaf tree is 1:4; the proportion between fast-growing trees and slow-growing trees is 1:1.The following tree species programmed in urban forestry construction of Qingdao on the above-mentioned demanding on trees planning in this thesis

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Add hours of daily bushwhacking through dry, dense, scratchy vegetation, and the romance of fieldwork quickly fades.

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The factors that in fluences the nest-site selection of Great Bustard mainly are the hight and density of vegetation.

大鴇巢址選擇的影響因于主要為植物高度和植被密度亚洲A∨好看AV高清在线观看。

On the contrary, in autumn, phenology, vegetation density and plant species richness are the most important factors that determined the habitat selection of houbara bustard.

與夏季相反，在秋季棲息地內(nèi)国产多人群p在线视频，植被密度国产黄色激情网站、草本植物種數(shù)强奸资源影音先锋、結(jié)實(shí)植物密度和物種數(shù)都極顯著高于對照區(qū)的相應(yīng)成分。

The hills in this area should be kept from destroying to protect vegetation and water, but the simple byway and stone path could he built.

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New Caledonia's ecosystems include several natural vegetation types.

新卡里多尼亞的生態(tài)系包括幾個(gè)自然植被類型。

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In general, it seems that the field margin and woodland were much fitter for carabid living than cropland; and it was beneficial to protect and establish such habitat for the biodiversity in agro-ecosystem.3 Because of the long-term intensively agricultural land using and rapid urbanization, the vegetation in the Dongbeiwang village was extremely homogeneous.

不同的生境類型下步甲群落的個(gè)體數(shù)量差異很大，農(nóng)田生境中步甲群落個(gè)體數(shù)量都較低国产精品无码一级二级三级，林地和農(nóng)田邊界地帶較高国产美女插逼视频；不同土地利用類型下，步甲群落的物種數(shù)量也有顯著差異国产丝袜足交在线，農(nóng)田邊界處步甲群落的物種數(shù)量最多一级特黄色网站，其次為林地和與邊界相鄰的農(nóng)田，而農(nóng)田中出現(xiàn)的物種數(shù)量最少99人妻视频。

Baishishan dense vegetation and forest coverage rate reached 12%, ghosts and other countries two arrows Caragana protected plants.

白石山植被茂密欧洲熟女另类，森林覆蓋率達(dá)12%，有鬼箭錦雞等國家二級保護(hù)植物一级毛片不卡免费免费观看。