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Between shrub and herb layers ,the difference of each index was not significant The total richness index and Shannon-Wiener index of Phellodendron amurense plantation community were all the highest than those of the other communities.(2) The total richness index of Machilus pingii- Quercus oxyodon evergreen broad-leaved forest community, Alnus cremastogyne-Betula luminifera-Quercus oxyodon evergreen-deciduous broad-leaved forest community and Rhus potaninii- Juglans sigillata- Quercus oxyodon evergreen-deciduous broad-leaved forest community all exceeded 31 .These communities , the dominance species in their shrub layers is Fargesia rufa ,such as Betula luminifera-Rhus chinensis-Quercus oxyodon evergreen-deciduous broad-leaved forest community, Quercus oxyodon-Litsea pungens-Cornus macrophylla evergreen-deciduous broad-leaved forest community, Cornus macrophylla- Acer caudatum var.

2润楠-曼椆常绿阔叶林、桤木-亮叶桦-曼椆常绿落叶阔叶混交林、青麸杨-野核桃-曼椆常绿落叶阔叶混交林群落的总体丰富度指数均大于31;在灌木层以青川箭竹为主的群落(亮叶桦-盐肤木-曼椆常绿落叶阔叶混交林、曼椆-木姜子-梾木常绿落叶阔叶混交林、梾木-川滇长尾槭-落叶阔叶林、川西樱桃-尾叶樱-川滇长尾槭落叶阔叶林)中,各群落总体丰富度指数和Shannon-Wiener多样性指数较小,总体优势度指数较大;8种次生林群落灌木层丰富度指数均高于乔木层,乔-灌层间丰富度指数差异性检验达显著水平;乔-草层间的丰富度指数差异性检验达极显著水平,Shannon-Wiener多样性指数差异达显著水平;灌-草层间的多样性指数和优势度指数差异性检验均达显著水平。

The result indicates that the water, tundra, residential sites, needle-leaved forest and brass were decreased from 1977 to 1985; while the plantation and the coniferous and broad-leaved mixed forest obviously increased; and the broad- leaved forest, betula ermanil forest, road and bare soil also increased. During 1985 to 1999, the water, bare soil, coniferous and broad-leaved mixed forest, broad-leaved forest reduced, the rest landscape types increased in this area.

分析表明:从景观面积变化率来看,1977~1985年间,水体、苔原、居民点、针叶林和草地的面积减少,耕地和针阔混交林的面积增加显著,阔叶林、岳桦林、道路、裸地增加;1985~1999年间,水体、裸地、针阔混交林和阔叶林的面积减少,其他类型面积增加。

The auther studied the community ecology of soil pro-tozoa by chosing the five representative forest types,korean-pine-broad-leaved forest,broad-leaved-korean-pine forest,korean-pine forest,broad-leaved forest andsylvesfriformis-pine forest in the coniferous-broadleaved mixed forest zone on northern slope of ChangbaiMountain during the summer of 1985-1987 in order tounderstand the composition of species and number of soilprotozoa in different forest types of the coniferous-broad leaved mixed forest zone;species dibersity indexand evenness index of soil protozoa in community;pro-tozoan density and biomass;noteworthiness of the re-gularity of protozoan number variance;distributionpattern in community;horizontal distribution;relation-ship of vertical distribution and soil micro-environ-ment etc.,and compare the similarities and differencesof these five forest types according to feature ofsoil protozoan community,and finally summarize thetheoretical regularity,the index or the evidonceof the best forest-type structure.

本文工作的目的是通过对不同林型下土壤原生动物的群落组成,群落结构特征的研究,以及对凋落物分解过程中原生动物种类和数量的初步调查,来探索土壤原生动物在指示环境条件和林型结构特征方面的可能性作用。

The study is carried out that the comparison of fine root production, decomposition and distribution along with Korean pine and broad-leaved climax forest succession; the fine root contribution to the belowground C and N storage along with Korean pine and broad-leaved climax forest succession; and the comparison of belowground C and N storage among the Korean pine and broad-leaved climax forest, three dark-conifer forests, a betula ermanii forest along altitude.

研究内容包括:原始阔叶红松林及其不同演替阶段的次生林中细根的生长和周转、分解与分布的特征,阐明在不同演替阶段细根的变化;原始阔叶红松林及其不同演替阶段的次生林中细根对根系、土壤和林地地下的碳、氮贮量的影响,分析在不同演替阶段细根周转对地下碳、氮贮量的贡献;以及对不同垂直海拔高度分布的不同类型的原始森林中细根和根系生物量的变化,及细根对根系、土壤和林地地下碳、氮贮量的贡献进行了研究。

To study the effect of nematode-induced forest succession on avian communities, we chose three forest types at different seral stages, including evergreen broad-leaved coppice infested by the pine wood nematode for five years and evergreen broad-leaved forest infested for 12 years, both from Xiangshan County, Zhejiang, and one 40-year-old evergreen broad-leaved forest from Tiantong National Forest Park, Zhejiang.

为了探讨在松材线虫侵袭所引起的森林演替过程中植被结构变化对鸟类群落的影响,我们研究了这此常绿阔叶演替林中的鸟类群落结构。2004年5-6月,我们在浙江省宁波市选择了分别处于3个不同演替阶段的7个样地:包括象山县被松材线虫侵袭5年后的常绿阔叶灌丛和侵袭12年后的常绿阔叶林样地各3个,同时在天童国家级森林公园选择了约40龄的常绿阔叶林样地1个。

The storages of WSOC under 11 forest types were as follows: Pinus massoniana forest 2.43 ×10~6 t , robur mixed forest 1.57 ×10~6 t, shrubs 1.22×10~6 t, Cupressus funebris forest 0.46×10~6 t, Cunninghamia lanceolata forest 0.60×10~6 t, Citrus reticulate plantation 0.38×10~6 t, other soft broad leaved forest 0.22×10~6 t, the broad leaved and coniferous mixed forest 0.22×10~6 t, Neosinocalamus affinis 0.16×10~6 t, other hard broad leaved forest 0.20 ×10~6 t, temperate Pine forest 0.06×10~6 t.

本研究采用该方法测定的各主要森林类型下WSOC总贮量为6.53×10~6 t.11种森林植被WSOC库分别为:马尾松林2.43×10~6 t,栎类混交林1.57×10~6 t,灌木林1.22×10~6 t,柏木林0.46×10~6 t,杉木林0.60×10~6 t,柑桔林0.38×10~6 t,其它软阔林0.22×10~6 t,针阔混交林0.22×10~6 t,竹林0.16×10~6 t,其它硬阔林0.20×10~6 t,温性松林0.06×10~6t。

The coverage of evergreen needle-leaved forest increased 15.2%.The coverage of deciduous needle-leaved forest, mixed leaf forest and deciduous broad-leaved forest decreased 71.7%, 32.1%, 86.7%, respectively.

常绿针叶林的面积扩大15.2%,阔叶落叶林、落叶针叶林和针阔混交林的面积分别减小86.7%,71.7%,32.1%。

RAPD(Random amplified polymorphic DNA) was used to detect the genetic diversity of Castanopsis eyrei populations in three forest communities at different succession stages in Tiantai mountain Zhejiang Province,namely,needle-leaved forest,needle/broad-leaved mixed forest and evergreen broad-leaved forest.

利用RAPD技术对甜槠种群在浙江省天台山不同演替阶段森林群落(针叶林、针阔混交林、常绿阔叶林)中的遗传多样性和遗传分化进行了分析。3个甜槠种群平均多态位点百分率为67.98%,总多态位点百分率为92.13%。

The maximum rate of decomposition of soil organic carbon insubtropical wetness area is red soil under coniferous and broad-leaved mixed forest>yellowsoil under grass>yellow soil under shrub>yellow soil under broad-leaved forest>red soilunder camellia oleifera; decomposition rate of yellow soil is faster than red soil. Themaximum rate of decomposition of soil organic carbon in subtropical wetness zone isyellow-brown soil under mixed forest in Nanjing>red soil under adult fir in Yujiang>redsoil under broad-leaved forest in Yujiang.

湿润亚热带地区森林土壤有机碳分解速率最大值出现在培养初期的一周内,其顺序:针阔混交林红壤>茅草黄壤>灌木林黄壤>常绿阔叶林黄壤>油茶红壤,同一植被下黄壤有机碳分解速率大于红壤,南京混交林黄棕壤>余江杉木(32年)红壤>余江常绿阔叶林红壤。

The Farming-pastoral Zone in North China was separated into 8 Eco-regions according to the known Eco-region. The dissertation analyzed the regional differences of land use changes from three aspects on dynamic degree , land use degree and the change direction (1)On land use dynamic degree, the dynamic degree of the cropland was the highest in North warm temperate deciduous broad-leaved forest and the lowest in temperate forest steppe; forest land's was the highest in alpine meadow and the lowest in warm temperate forest steppe; grassland's was the highest in temperate forest steppe-bunchgrass steppe and the lowest in alpine meadow; other land's was the highest in North warm temperate deciduous broad-leaved forest-the Huang-Huai-hai plain and the lowest in warm temperate bunchgrass steppe.

结合已有的自然生态区的划分,将我国北方农牧交错带划分为8 个自然生态区,选取土地利用动态度、土地利用程度以及土地利用变化方向等3 个方面的指标对研究区进行了区域分异规律的研究,结果如下:(1)耕地动态度北暖温带落叶阔叶林生态区——北部山地丘陵区最大,温带森林草原生态区最小;林地的动态度高寒草甸生态区最大,暖温带森林草原丛生禾草草原生态区——东南森林草原区最小;草地动态度温带森林草原——丛生禾草草原生态区最大,高寒草甸生态区最小;其他用地的动态度北暖温带落叶阔叶林生态区——黄淮海平原区最大,暖温带森林草原丛生禾草草原生态区—西北丛生禾草草原区最小。

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