查询词典 grassland

But recent survey reported that Panicum maximum, a perennial grass in the family of Poaceae and listed as one of the twenty most noxious invasive plants in Taiwan has replaced the role of M sinensis in those areas. As a result of recurrent burning, A. confuse forest has been gradually replaced by the grassland of P. maximum. In this study, I compared morphological, photosynthetic, growth and life history characters of field growing P.

早期的研究指出：在大肚山与铁砧山区的本地植物芒草为当地相思树林反覆火烧后的最优势种；但近年来同一地区的研究显示：大黍已取代芒草的角色，而且发现大黍在火烧后植群覆盖度显著的增加，但芒草却没有相同的现象；反覆火烧使得大肚山地区的相思树林逐渐转变成以大黍为主的草生地。

Fresh air and scenic spots, with plenty of sunshine, the trench Falls, pari-mutuel, grassland, Hai Zi, spring, karst caves, stone Cup spread all over, the charming scenery and rich ethnic customs, and Jiuzhai-Huanglong beauty, but more quiet.

景区空气清新，阳光充沛，沟内瀑布、彩池、草场、海子、山泉、溶洞、石杯星罗棋布，自然风光迷人，民族风情浓郁，集九寨和黄龙之美，却更为幽静。

Grassland conservation and development cannot be separated from pastoralist culture and people, but decision-makers have ignored this over the past decades, academic experts and environmentalists say.

草原的保护和发展不能脱离游牧文化和人民，但决策者忽略了，这在过去几十年，学术专家及环保人士说。

But in recent years, owing to the degeneration and desertification of the grasslands, together with the plague of grasshoppers, it aggravated the ecological environment of grassland, which has become a major obstacle for the maintenance of pasturage in northwest of China.

但近年来，由于草地退化和荒漠化，再加上蝗灾的危害，致使川西北草地的生态环境更为恶化，严重的影响了我国西部地区畜牧业的发展。

At the present time,grassland degradation in China is serious which has been a main handicap to environmental protection and economic development in pasturing areas.

我国草地资源位居世界第二位，但目前退化非常严重，已经成为牧区生态环境保护和经济发展的主要制约因素。

Doubtlesly, grassland degradation will influence herdman's production activity and the development of pasturing area economy.

草地资源是我国干旱半干旱地区生态安全的重要屏障，也是草地畜牧业发展的重要物质基础。

For forest, grassland and river ecosystems, phreatophyte should be applied to, promoting the primary succession of the ecosystem. For farm and urban ecosystems, the main crops and pollution-resisting ornamental plants should be selected for the purpose of agricultural production, landscapes construction and bioremediation so as to control the speed and direction of secondary succession of these ecosystems.

对于森林、草地、江河等自然生态系统，植被选择应以原生种类为主，以促进生态系统进行原生演替；而农田、城市绿地生态系统，植被恢复应以生产生活、景观营造、生物修复为目的，宜选择当地主要优势农作物、观赏性好、抗污染的植物，以控制生态系统次生演替的方向和速度。

Some researchers believe that the latter area possesses savanna vegetation. Savannas are closely associated with seasonal drought, and they may be defined by climatic climax vegetation in tropical and subtropical areas. Based on the ecoclimatic analyses as well as the surviving vegetation in Taiwan, we inferred that the potential natural vegetations of these 2 semi-arid regions were not savanna but forest with some drought-deciduous trees. In conclusion, the physiognomic type of grassland dotted with trees may occur in small areas at present, but Taiwan lacks climate-shaped savanna climax vegetation.

本研究将疏林定义为分布於热带及亚热带之气候形塑的极相植群，气候分析结果表明台湾半乾旱区域之缺水逆境并不严重，再配合现生残存植群之观察，发现台湾有形相为疏林的现生局部性植群，但其潜在自然植群应为参杂有乾旱落叶之阔叶树种的森林，并不存在较大面积之潜在的气候型极相疏林。

The plateau pika, whose distribution largely coincides with the high alpine grassland of the Qinghai-Xizang plateau of People's Republic of China, is one of the dominant small mammals in the alpine meadow ecosystem.

高原鼠兔是青藏高原特有的一种植食性小哺乳动物，在青藏高原高寒草甸生态系统的食物链中起着重要作用，同时也是该地区危害最为严重的优势物种之一。

The changes of all land using types indicated that all the 11 countryside's grassland reduced, unused-land increased, and plowland increased only in those countryside along the river and have commodious river valley.

以乡为单位，各类型用地的变化显示，全县11个乡镇的草地面积减少，未利用地面积增加，耕地面积只在沿江具有宽阔河谷的各乡有所增加。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。