查询词典 vegetation

In Zhejiang,the moun- tain and hill areas make up 70.4% of its total area. Owing to the effect of both physiographical factors(rock character, landform,soil,vegetation and rainfall,etc.)and anthropogenic factors deforestation,land reclamation on steep slops and irrational use of Land resource,etc.

由于自然条件和人为因素的影响，土壤侵蚀严重，致使土地退化，河床、水库淤高，生态环境恶化，水旱灾害加剧，成为浙江省农业生产和国民经济发展的一大制约因素。

We also have studies the fossil record and phytogeographic history of Rhizophoraceae, modern flora and vegetation of Hainan Island.

此外，我们还研究了红树科植物的化石记录及植物地理史，同时研究了海南岛现代植物区系和植被特征。

These results demonstrate that the Chinese seed plant genera correspond well to recognized vegetation zones and floristic regions, providing further support for the current phytogeographic definitions.

中国种子植物属的地理成分的分布格局与现行的中国植被分带和植物区系分区密切匹配，支持现行的中国植被分带和植物区系分区方案。

Phytosociological description of vegetation has always been found on field sampling alternating with studies of the releves at home.

植被的群落学描述已经常以野外抽样为基础来取代室内样地记录的研究。

A phytosociological study on the semi-savanna vegetation in the dry-hot valleys of Yuanjiang River, Yunnan.

云南元江干热河谷半萨王纳植被的植物群落学研究。

According to the phytosociological theories and methods of Braun-Blanquet's school, the regional savanna vegetation of the dry-hot valleys of Yuanjiang river had been investigated. Based on the principle of fidelity degree, the typical 110 releves taken from every sampling stands of the dry-hot valleys were sorted up from below to upper into 15 Associations, then into 5 Alliances, 2 Orders and 1 Class. A synoptic classification system of Class-Order-Alliance-Association was established for the purpose to reflect deeply the characteristics of all syntaxa there in the aspect of plant component and their abundance-dominancy, presence, cover coefficient, life form, growth form, and ecological environment, community structure, species types and so on.

采用Braun-Blanquet植物群落学研究的理论与方法，对云南元江中上游干热河谷分布的植被进行考察研究，把各处取得较典型的110个样地记录按确限度的原则由下而上归类成15个群丛、5个群属、2个群目和1个群纲，建立了元江干热河谷萨王纳植被群纲—群目—群属—群丛分类系统综合表和15个群丛表，以全面深入反映全干热河谷植物群落各级分类单位中各植物种类组成的多优度、存在度、盖度系数、生活型和生长型等特征及其群落结构、生态环境和种型类别。

Picea mongolica, which is a characteristic and one of the first afforestation tree species in Inner Mongolia, plays a great role at the vegetation recovery in the desertfied areas.

沙地云杉是内蒙古赤峰地区与锡林浩特的局部地段所特有乡土树种之一，也是沙地造林的首选树种之一，对于恢复沙化土地植被具有重要的意义。

Well-destruction of vegetation, at present mostly cultivated in forests, in order to Pinaceae dominant.

植被久经破坏，目前多为人工栽培的次生林，以松科植物占优势。

Indoor model test for hydraulic characteristics of common floating vegetation channels in ecological restoration was carried out. Healthy Pistia stratioes linn was planted in the rectangle model river-course in different shapes. The velocity of flow in different situation was measured by three-dimensional acoustic Doppler velocimeter. The change of the rule of velocity was analyzed.

通过在矩形水槽中按不同方式种植个体较小、生长旺盛的大吀进行室内模型试验研究，利用三维超声波多普勒测速仪（acoustic Doppler velocimeter， ADV）分别测量按不同形状种植漂浮植被的矩形水槽中水流的瞬时流场，分析了植被附近区域水流在种植植被前后沿垂线方向的流速分布规律。

Principal component analysis showed total microbial population can be an index to evaluate vegetation restored precess and soil quality.

近年来一些学者[5，6]对黄土丘陵区植被恢复后土壤质量演变进行了研究，取得了较为满意的结果，但大多研究集中于

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。