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灌木盖度
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  shrub coverage
    Height of trees and shrubs, density of trees and shrubs, shrub species, shrub coverage, tree composition and canopy are employed to evaluate the forest community.
    森林群落指标主要包括 :林木高度、灌木高度、灌木株数、林木株数、灌木种类、云冷杉林木组成比例、灌木盖度和森林郁闭度 .
短句来源
    The selection principal factor analysis was adopted and 3 principal fac- tors, namely, canopy density, grass coverage and shrub coverage were screened out, on which 5 types of water conservation forest were classified, including high structure, high-medium structure, medium structure, medium-low structure and low structure. We intended to provide base with this paper for the aforestation of water conservation forest in Taihang mountainous areas of Henan.
    采用挑选主导因子分析的方法,筛选出郁闭度、草本盖度、灌木盖度三个主导因子,并将其林分划分出高结构型、高中结构型、中结构型、中低结构型、低结构型5个水土保持结构类型,为河南省太行山区营造水土保持林提供了依据。
短句来源
    Quantitative factors showed that a total of 12 factors (slope; average tree and bamboo height, average circumference of tree at breast height (ACTBH); tree and shrub coverage; tree, bamboo and lianas density; and distance to water, roads and fields of Fructus amom), were significantly different between used and available sites, which revealed high selectivity to the spatial structure of habitats.
    定量因子分析表明,利用和可利用样地中共有12个因子(坡度,乔木和竹平均高度,乔木平均胸围,乔木和灌木盖度,乔木、竹和藤本密度,距水源、道路和草果地距离)存在显著差异,说明白眉长臂猿对栖境的空间结构具有高度的选择性。
短句来源
  “灌木盖度”译为未确定词的双语例句
    The selections on plant cover, shrub cover(independent samples t -test, P <0.05), and shrub height(Mann Whitney U -test, P <0.05) are in relatively small range.
    白马鸡对植被盖度、灌木高度(independentsamplest test,P<0. 05)和灌木盖度(MannWhitneyU test,P<0. 05)等因子的选择是在相对较小的区间范围内.
短句来源
    the secondary factors were the vegetation type, coverage, relative food abundance and shrub overcast;
    次要因子是植被型、郁闭度、食物丰盛度、灌木盖度;
短句来源
    the secondary factors were the food abundance, vegetation type, coverage and shrub overcast, respectively;
    次要因子是食物丰富度、植被型、郁闭度、灌木盖度;
短句来源
    Its distribution patterns were mainly contagious, even when the shrub cover was very high and random in young Cathaya stands.
    银杉种群的分布格局主要为集群分布,但在灌木盖度偏高的林型中表现为均匀分布,在中幼龄林分中则为随机分布
短句来源
    Through the investigation at l70 sample plots of soil and water forest in limerock re-gion of Taihang mountain and the analysis of l3 qualitative and quantitative factors in each sam-ple plot,the soil and water conservation forests are ordinated by methods of principal componentanalysis(PCA).
    通过对太行山低山石灰岩区水保林定性和定量兼有的13个变量,170块标他调查,采用主成分分析(PCA)方法,对该区的水保林进行排序,结果表明,≤500m丘陵区可划分为四个类型:灌木盖度>20%侧柏、山皂荚乔灌草型; 灌木盖度≤20%侧柏、白草乔草灌型;
短句来源
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  shrub coverage
The population occurrence potentially depended on shrub coverage, and the development was crucially controlled by herb coverage.
      
The best models included habitat variables at the three spatial scales examined: distance from lagoons (broad scale), mean landscape shrub coverage and interspersion of pastures (home-range scale), and shrub and pasture cover (microhabitat scale).
      
SOM and total nitrogen have the greatest effect on plant characteristics (mainly shrub coverage) among all soil factors.
      
After 5 years, habitat support measurements as indicated by aerial tree and shrub coverage should increase over time.
      
Dwarf shrubs grow on many bogs; but not all dwarf shrub coverage signifies bog; and not all bogs have dwarf shrub coverage.
      
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Adapting the polycross trial method,the author studied the lower-protection -function stands.Three years after planting,the herds'and shrub'coverages increased by 16.7-33.3%and 18.3~48.3% in the reforestde Cypress stands,The mixural,modrerate density and soiling block of Cypress wity Alder stand presents the best,while in the Horse-tail pine stands, the coverage by 36.7-75.3%and 13.4-16.7%,best in line-stripe cross and modcrate-density pine with Locust tree.The general trands are that the reforestation tria...

Adapting the polycross trial method,the author studied the lower-protection -function stands.Three years after planting,the herds'and shrub'coverages increased by 16.7-33.3%and 18.3~48.3% in the reforestde Cypress stands,The mixural,modrerate density and soiling block of Cypress wity Alder stand presents the best,while in the Horse-tail pine stands, the coverage by 36.7-75.3%and 13.4-16.7%,best in line-stripe cross and modcrate-density pine with Locust tree.The general trands are that the reforestation tria can recover the plants cover,improve the soil properties as to increase the pole percentage and water-hold capability.

以嘉陵江流域低山暴雨区水土保持低效林为研究对象,经过调查,选择旺苍县营造了林分改造试验林108亩,示范林3900亩,试验林采用多因素正交法进行研究,经过栽培三年后的调查分析结果:柏林低效林分改造各试验组合的草本植物和灌木盖度比改造前增加16.7~33.3%和18.3~48.3%,乔木以桤木、柏木混义、中密度和培土的组合最佳;马尾松低效林分改造各试验组合的草本植物和灌木盖度增加36.7~53.3%和13.4~16.7%,乔木以马尾松、刺槐行带混交和中密度的组合最佳。由于经过改造的林地植被恢复快,土壤理化性质得到改善,土壤非毛管孔隙和总孔隙度增加,贮水能力明显提高。

Cathaya argyrophylla Chun et Kuang is a China endemic and endangered evergreen conifer, listed in the Red Data Book of plant in China, with less than 5000 individuals remaining on earth.The age structure of C.argyrophylla population in Bamianshan Mountain showed its stability, but was different among metapopulations, especially in the aged Cathaya forests there often appeared a lack of generation continuety. Though the aboveground biomass of the population varied from 30000 kg·ha -1 to 110000 kg·ha -1...

Cathaya argyrophylla Chun et Kuang is a China endemic and endangered evergreen conifer, listed in the Red Data Book of plant in China, with less than 5000 individuals remaining on earth.The age structure of C.argyrophylla population in Bamianshan Mountain showed its stability, but was different among metapopulations, especially in the aged Cathaya forests there often appeared a lack of generation continuety. Though the aboveground biomass of the population varied from 30000 kg·ha -1 to 110000 kg·ha -1 with different metapopulations, the increment of the biomass had no significant difference among metapopulations but could basically reflect the productivity of this population in that area.Its distribution patterns were mainly contagious, even when the shrub cover was very high and random in young Cathaya stands.

银杉(Cathaya argyrophylla Chun et Kuang)是中国特有濒危植物,其残存个体总数不足5000棵。八面山银杉种群的年龄结构从整体上看比较合理,但对于不同的林型差异较大,特别是在老龄林内常出现断代现象。应用标准木法对银杉种群地上部分生物量的研究表明,地上部分生物量因林型而异,介于30000—110000 kg·ha- 1,但其年平均生长量差别不大,基本反映了八面山银杉种群的生产力水平。银杉种群的分布格局主要为集群分布,但在灌木盖度偏高的林型中表现为均匀分布,在中幼龄林分中则为随机分布

Through the investigation at l70 sample plots of soil and water forest in limerock re-gion of Taihang mountain and the analysis of l3 qualitative and quantitative factors in each sam-ple plot,the soil and water conservation forests are ordinated by methods of principal componentanalysis(PCA).The resuIts show as follows:(1)The four types are divided in hilly region un-der the altitude of 500 meters。They are in turn:arbor,shrub and herb mixed model ofPlatycladus orientalis and Gleditsia microphylla with above...

Through the investigation at l70 sample plots of soil and water forest in limerock re-gion of Taihang mountain and the analysis of l3 qualitative and quantitative factors in each sam-ple plot,the soil and water conservation forests are ordinated by methods of principal componentanalysis(PCA).The resuIts show as follows:(1)The four types are divided in hilly region un-der the altitude of 500 meters。They are in turn:arbor,shrub and herb mixed model ofPlatycladus orientalis and Gleditsia microphylla with above 20%shrub coverage,arbor,herband shrub mixed mod el of Platycladus orientalis and Pennisetum flaccidum with under l0%shrub coverage,shrub and herb mixed model of Vitex negundo var.heterophylla and Ziziphusjujuba with a little litter,and Pennisetum flaccidum herb wasteland without litter.(2)The fourtypes in low mountain region(500一800m)are:arbor,herb and shrub mixed model ofPlatycladus orientalis,Pinus tabulaeformis and Vitex negundo var.heterophylla with under l0%shrub covevage,shrub and herb mixed model of Vitex negund var.heterophylla,cotinuscoggygria var.cinerea and Ziziphas jujuba with above 50%shrub coverage,herb slopeland mod-el of Pennisetum flaccidum,Themeda triandra and Pennisetum flaccidum,with above l0cm soildepth, and arid waste land model with under l0cm soil depth.These divided types characteristicsare manifest and difference among these types is significant by statistical test;The classificationare recognized as justified with high accurecy according to Fisher test analysis,These results con-form to practical state in the area.The arbor,herb and shrub mixed model is regarded as thebest model of soil and water conservation forest.

通过对太行山低山石灰岩区水保林定性和定量兼有的13个变量,170块标他调查,采用主成分分析(PCA)方法,对该区的水保林进行排序,结果表明,≤500m丘陵区可划分为四个类型:灌木盖度>20%侧柏、山皂荚乔灌草型;灌木盖度≤20%侧柏、白草乔草灌型;少枯落物荆条,酸枣灌草型;无枯落物白草荒坡型。501~800m浅山区可划分为四个类型:灌木盖度≤10%侧柏、油松、荆条乔草灌型;灌木盖度>10%荆条、黄栌、酸枣灌草型;土层厚度>1Ocm白草、黄背草、竹叶草草坡型;土层厚度≤10cm于瘠荒坡型。所划类型,经t检验,差异显著,特征明显。采用Fisher判别分析,回判率较高,符合石灰岩区水保林实际情况。据调查分析,该区最佳水保林模式应是以乔草灌搭配的类型。

 
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