查询词典 vegetation

In recent years,with the study in aboveground vegetation part in depth,research on the roots becomes more and more attention and concern.Therefore,a number of new researches on roots is carried out.

近年来随着对地上部分研究的深入，同时对根系的研究日益受到重视和关注，因而根系的研究在多个新的研究方向上展开。

An optical model used for grassland assessment is established based on the relationship between vegetation index and aboveground biomass.

通过地上生物量和植被指数间的对应关系，建立草原生产力估产模型。

And using the two red edge parameters(red edge slope and red edge position),a new vegetation index(red edge curve shoulder angle vegetation index,abbreviation RSAVI) was calculated to detect ri...

为了证明RSAVI在监测水稻氮素营养状况的可行性，分析了不同生育时期氮素含量和RSAVI之间的相关性。结果表明RSAVI和叶片氮素含量显著相关，相关系数介于0.867～0.938之间。

Based on the mechanism of nitrogen transfer among different rice leaves, red edge slope and red edge position of the most upper and the 3rd expanded leaves were investigated specially. And using the two red edge parameters (red edge slope and red edge position), a new vegetation index (red edge curve shoulder angle vegetation index, abbreviation RSAVI) was calculated to detect rice nitrogen nutrition status.

基于氮素在水稻不同功能叶片之间运转规律的机理，文章重点分析了第一和第三完全展开叶红边斜率和红边位置的变化，并基于红边位置和红边斜率构建了一个新的植被指数（命名为&红边曲线肩夹角植被指数&，简称为RSAVI）监测水稻氮素营养状况。

From the macroscopical scale, the climate is the most primary factor that determines the vegetation types and species distribution on the earth, moreover the distribution of vegetation and species is the most sharp-cut reflection and symbol of the earth climate.

从宏观尺度来说，气候是决定地球上植被类型及其物种分布最主要的因素，而植被和物种分布则是地球气候最鲜明的反映和标志。

The results showed that 9 natural vegetation types were distributed in 6 gradients. Except gradientⅠ, the dominant vegetation types along other gradients were all monsoon evergreen broadleaved forest. Gradient had greater effects on the distribution of seasonal rainforest and temperate coniferous forest, had some effects on the distribution of mountain rainforest, deciduous monsoon threat and river valley savanna forest, had smaller effects on monsoon evergreen broadleaved forest had no effect on warm-hot savanna forest and tropical bamboo forest.

结果表明：9个自然植被类型在6个坡度级均有分布；6个坡度级中除Ⅰ坡度级优势类型是水域外其他坡度级的优势植被类型均是季风常绿阔叶林；坡度对季节雨林和暖温性针叶林的分布影响较大，对山地雨林、落叶季雨林和河谷稀树灌木草丛的分布有一定影响，对季风常绿阔叶林和暖热性稀树灌木草丛的分布影响较小，对暖热性针叶林和热性竹林的分布无影响。

When the flowing mass reaches the drain at the foot of the bank it spreads out flatter into strands, the separate streams losing their semi-cylindrical form and gradually becoming more flat and broad,running together as they are more moist, till they form an almost flat sand, still variously and beautifully shaded, but in which you can trace the original forms of vegetation; till at length, in the water itself, they are converted into banks, like those formed off the mouths of rivers, and the forms of vegetation are lost in the ripple marks on the bottom.

当那流质到了路基脚下的排水沟里，它就平摊开来而成为浅滩，各种溪流已失去了它们的半圆柱形，越来越平坦而广阔了，如果更湿润一点，它们就更加混和在一起，直到它们形成了一个几乎完全平坦的沙地，却依旧有千变万化的、美丽的色调，其中你还能看出原来的植物形态；直到后来，到了水里，变成了沙岸，像一些河口上所见的那样，这时才失去植物的形态，而变为沟底的粼粼波纹。

It is shown that it is difficulty to differentiate each vegetation type among sub-tropical evergreen forest, sub-tropical coniferous forest and sub-tropical deciduous forest because of the mixture of their tree spectra. According to the reflection index in the wavelengths of 750 nm to 1 100 nm, the tree species can be divided into 4 groups with descend in reflectivity. Each tree specie can be differentiated from each other according to its slope of the spectrum curve and its reflection index in the wavelengths of 770 nm to 1 010 nm for each forest vegetation type. The unique first order derivative feature can be used to identify litsea, alder, fir, red birch, southwest birch, large schima confertiflora, taiwania flousian and small leaf schima confertiflora.

研究表明：亚热带常绿阔叶林、亚热带针叶林和亚热带落叶阔叶林等植被类型，因其树种间光谱特征混淆严重，而难以彼此区分；根据其反射率在750~1 100 nm范围上的差异，可将其归为4类；就各植被类型而言，其树种间在光谱曲线坡度，以及在770~1 010 nm范围上具有显著差异，可据此将其区分；木姜子、桤木、杉木、红桦、大叶木荷、秃杉和小叶木荷等因具有独特的光谱一阶导数特征，据此可以识别提取。

The maximum water content is 39.51%. It is indispensable or even the unique water source for natural forest and manual vegetation live through the winter,vegetation growth in spring,water metabolism,and also is a centra factor of ecological balance.

冻结滞水比冻结前水量一般增加8%～25%，最高增加39.51%，是天然和人工植物越冬、春季繁衍的水分代谢均衡不可缺少的，甚至是唯一水资源，是保持生态平衡的主导因子。

P in Shule River Alluvial Fan Oasis in Gansu subsidized by CNSF. Through field geological and environmental observations and sampling, quartz OSL dating, organic carbon ~(14)C dating, as well as analysis of TOC,grain size and Pollen assemblage of the samples from ten sediment profiles in front fine grain sediment zone of the Shule River Fan, the results obtained as follows:(1)The vegetation evolution history on Shule River Alluvial Fan and circumjacent since about 13 ka B.P. could be divided into 6 phases: about 12.1-13.1ka, a sparse coniferous and broadleaf trees - shrub grassland, cold and wet climate; 9.2-12.1ka, shrub grassland, temperature rising but precipitation and humidity getting down; 5.8-9.2ka, sparse forest with the most flourish shrub grassland under the optimal climate; 4.3-5.8ka, coniferous and broadleaf mixed forests -shrub grassland, temperature rising slightly and getting dry; 4.3-2.8ka, grass vegetation and climate became more dry; 2.8-2.3ka, coniferous forests -shrub grassland, precipitation and temperature getting down, but a higher relative humidity.

本文依托于&甘肃疏勒河冲积扇5万年来古天气环境与古水文演化&项目，以疏勒河冲积扇为研究对象，通过对疏勒河冲积扇扇缘细土带全新世古天气和古水文演变进行了20余个剖面的观测和取样、石英OSL和~(14)C测年、粒度组成和TOC分析以及孢粉鉴定，获得了以下成果和熟悉：(1)距今约13ka年来冲积扇和周边植被演化经历了6个阶段：约13.1～12.1ka，以针叶林为主的针阔混交林～灌丛草原，天气冷湿；12.1～9.2ka，灌丛草原，气温升高，降水量较低；9.2～5.8ka，疏林灌木草原，植被茂盛，温度和降水最佳；5.8～4.3ka，以针叶树为主的针阔混交林～灌丛草原，气温较高，降水减少；4.3～2.8ka，草原植被，天气变干；2.8～2.3ka，针叶林～灌木草原，降水减少，温度降低，相对湿度有所增加。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。