查询词典 vegetation

There is a obvious trend that vegetation landscape in Minqin Oasis is fragmentized by degrees, the diversity and heterogeneity of landscape is aroused, and the oasis is developing to unstable status induced by decline of medium and high cover vegetation and landscape fragmentation.

绿洲景观的破碎化趋势明显，景观的多样性逐步增强，异质性升高，绿洲正向不稳定的方向发展，中、高盖度植被的减少和景观的不断破碎化是绿洲景观不稳定的最重要因素。

Pure-remote sensing information models are free of the numerous distributional parameters that are difficult to obtain in vast area. The following sections are included in the study.(1) The VCI and SVI based on time-series NDVI data are used to analyse regional drought and the following results were reached: As the vegetation growth status index, the response of VCI and SVI to precipitation was land cover type, temporal and site specified. So VCI and SVI have little information about drought when used to monitor regional drought especially in China that has a mountainous topographty.(2) Based on the interpretation of NDVI-Ts space, NDVI and land surface temperature was combined to construct NVDI-Ts space from which the TVDI (Temperature Vegetation Dryness Index) was obtained with line ratio method and normalized slopes method. When compared with the topsoil moisture measured in situ, TVDI are competent in regional drought monitoring. Illumed by the NDVI-Ts space, we combined the NDVI with day/night land surface temperature difference and apparent thermal inertia to construct NDVI-ΔT and NDVI-ATI spaces from which the DVDI and AVDI were estimated respectively with 8-day composite MODIS 〓 product and 16-day composite MODIS NDVI product.

具体包括以下几方面的内容：(1)VCI和SVI在干旱监测中的作用评价：探讨利用NDVI时间系列数据建立的植被状态指数和标准植被指数评价区域干旱的可行性，研究结果表明：VCI和SVI作为植被相对生长状况指标，对降水的响应随着植被覆盖类型、时间和空间等而表现出不同的敏感性，因此在大区域干旱监测中，特别是我国这样地形复杂多样的国家，VCI和SVI在干旱监测中的作用都是有限的；(2)利用TVDI评价全国干旱等级分布：结合陆地表面温度和植被指数建立NDVI-T〓空间，在NDVI-T〓空间物理意义理解的基础上，分别采用线段比值法和斜率归一化法构建温度植被干旱指数，并利用TVDI研究了我国2000年3～5月份各旬的干旱分布，取得比较满意的结果。

Results of recent research suggested that, after the transformation of vegetation type, whether the soil sequestrated or lost carbon and by how much depended not only on vegetation types before and after the transformation but also intensity of land management and the history and actuality of land use.

本研究综述了国内外近年来的有关研究进展，结果表明，植被变化过程中SOC的变化方向和数量大小不仅取决于变化前后植被类型，还主要与土地利用的历史、现状及管理活动强度有关。

The IKONOS data of Beijing Yuanmingyuan is fused with Tasseled Cap and PCA methods.The fusion results are analyzed and compared with full image and vegetation subset.The result shows that,in study area,the KT fusion method is better than PCA in full image and vegetation subset.The fusion results are differential with different KT transformation matrix,and the method of fusion should be chosen according to study area,data,and classification methods.

应用缨帽变换和主成分分析方法，对北京圆明园周围的IKONOS全色波段和多光谱波段进行融合，并分别对整景影像和植被区的融合结果进行对比研究，结果表明：在该实验区，整景影像和植被区缨帽变换融合结果都优于主成分析结果，不同的缨帽变换系数矩阵在整景影像和植被区融合质量会有差别，应根据具体地点、时相，分类方法做适当的选择。

After analysis of TM/ETM+ datas advantage over the forest change detection, Tasseled Cap transformation, Principal Component Analysis and Normalized Difference Vegetation Index were chosen to enhance the vegetation spectral information.

在分析ETM+数据在森林资源监测中的优势的基础上，通过缨帽变换、主成分分析和植被指数法增强植被光谱信息，结合专家分类系统对沿海防护林主要树种进行提取。

The strategies for restoring and rebuilding vegetation in study area were put forward that selecting local plant,harvesting rainwater to create spot distributed arbor and bush forest in following the ecosystem regulation that vegetation match with the local weather.

提出在遵从植被与气候耦合的生物地带性生态规律的基础上，以乡土植物，配合雨水集流等补充灌溉，创造斑块状乔灌木植被，是实现该地区的植被恢复、重建和稳定的重要途径。

The typical desert predominates in the vegetation can be divided into 3 vegetation types, 7formation groups, and l7 formations; and community with fewer species, simple structure disparts greatly by environment at there.

目前的植被正处在进一步退化过程中，植物种类和面积减少，大面积枯梢、死亡，优势种的优势度增大。

Through comparing effects between grazing systems and a feedlot system on the degenerated vegetation, the roles of rotational grazing system playing in vegetation recovery were investigated.

通过对比研究放牧制度及围栏封育对退化草地植被的影响，来探讨划区轮牧在退化草地植被恢复中的作用以及最优的放牧方式。

The results showed:(1)Nitrogen addition changed the soil physical and chemical properties, enhancing the content of NO3—- N available resources in the soil, increasing the plants height and cover, reducing the vegetation light penetration. With increasing of N addition, both the species richness and the diversity decrease sharply (P 0.001).(2)N addition increased the aboveground biomass significantly (P 0.05). With increasing of N addition, the aboveground biomass increased first then decreased, and the grasses biomass increased while the forbs and legumes biomass decreased.(3)There was a significant linear positive relationship between species richness and vegetation light penetration (P 0.05), and also between aboveground biomass and soil NO3—- N content (P 0.05). The relationship between aboveground biomass and species richness was negative upon enhanced N supply.

结果表明：（1）氮素添加提高了土壤中NO3—- N等可利用资源的含量，增加了植物群落植被的盖度，减小了植被的透光率，随着施氮量的增加群落中物种丰富度显著降低（P 0.001）；（2）氮素添加显著改变了植物群落地上生产力（P 0.05），随着施氮量的增加地上生产力呈现先增加后降低的变化趋势，各功能群中禾草生物量显著增加，而杂草和豆科生物量随施氮量增加逐渐减少；（3）物种多样性与植被透光率呈线性正相关（P 0.05）；地上生产力与土壤NO3—- N含量呈线性正相关（P 0.05）；随着施氮量的增加物种丰富度与生产力之间呈负相关关系。

Based on the field survey, data collection and statistics of tree resources in the typical plant community and the natural vegetation abundant areas in Shennongjia nature reserve, Wudangshan nature reserve, Xingdoushan nature reserve, Jiugongshan nature reserve, Tiantangzhai forest park, and the landscape trees resource, growth effects and the application situation in the selected typical cities of Wuhan, Yichang, Shiyan, Xiangfan, Enshi, Huangshi, Xiantao, Daye, Xianning etc., and combined with the planning of city system of Hubei Province, the trends and further requirements of urban greenings and the natural vegetation distribution of Hubei Province, this research, aiming at providing the data and scientific bases for the further development and construction of urban green system, undertook the zoning and planning of tree species of the cities of Hubei Province.

本研究在对湖北省神农架自然保护区、武当山自然保护区、星斗山自然保护区、九宫山自然保护区、天堂寨森林公园等天然植被荟萃的典型区域进行树种资源和典型群落实地调查、资料收集和对我省武汉、宜昌、十堰、襄樊、恩施、黄石、仙桃、大冶、咸宁等代表性的城市市区内的园林树种的种类、应用状况、生长效果等方面进行了实地调查和统计分析的基础上，结合湖北省城市体系规划、城市园林绿化发展的趋势、要求和各地植被规律等特点，对湖北省城市园林树种进行了区划和树种规划，以期为湖北省城市绿地的进一步建设和发展提供资料和科学依据。

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％。