查询词典 grassland

Vegetation ecotype tend to be xerophyte and even hyper-xerophyte and finally replaced by annual plant. Community structure and species diversity also decrease as the ecological environment worsen, In this process, the height, coverage and biomass decreases by 56.6%、 80.8% and 74.2% respectively compared to steppe, and the indices of species richness, diversity and evenness decrease by 76.4%、 56.7% and 32.0%, but β diversity indices increase by 14.6 times, especially the decease of species gregariousness and the breadth and overlay of species Niche shows that grassland tend to be more sandy and vegetation retrogression succession take place.

其中，植被生态型逐渐由中旱生向旱生、超旱生过渡，并最终被一年生植被替代；群落结构及多样性呈明显递减规律，到严重沙化阶段，草群高度、盖度、生物量与典型草原相比，下降幅度分别达到56.6%、80.8%和74.2%；物种丰富度、多样性及均匀性分别降低76.4%、56.7%和32.0%；而群落β多样性增长14.6倍，特别是多年生物种群聚度降低和生态位宽度、生态位重叠值的下降，表明草地沙化，植被发生逆行演替。

Cattle, horses, sheep group foraging habitat, grazing Cukuang were singing clear and the sound of bullwhip, the integration of the enchanting birds, but also for the simple addition of grassland infinite vitality.

牛群、马群、羊群群栖觅食，放牧人粗旷的歌声和清脆的长鞭声，融合着悦耳动听的鸟声，更给朴实的草原增添了无限的生机。

Afterwards, make use of the whole year MODIS-NDVI data of 2004 of Leimeng grassland, Hainan evergreen broad-leaved forests and Qinghai's west hungriness, test the ability of the model of NDVI based on MODIS in monitoring vegetation. The result shows that the MODIS-NDVI can reflect the differences of variety of vegetation and the changes of growth of the same vegetation.

接下来利用2004 年内蒙草原，海南省东部常绿阔叶林和青海省西部荒漠一年中的MODIS-NDVI 数据，对MODIS-NDVI 监测不同植被和土壤覆盖类型的特性进行了研究，结果说明基于时间序列的MODIS-NDVI 对植被种类的生长变化进行了很好的描述。

The paper applies NDVI as the main index to monitor the entironment of each county in study area. We finded that counties main covering with woodland had the best health status, and counties main covering with hungriness grassland and woodland had comparatively bad health status affected by climate factors.

使用NDVI为主要指标对研究区各旗/县生态环境进行监测，以林地为主的旗/县生态系统健康状况最好，以荒漠化草原和耕地为主的旗/县受气候因素的影响，健康状况较差。

Nenjiang watershed is abundant of natural resource such as forest, grassland and wetland. While in later 20 years, the resource decreased and is decreasing in large scale. Environmental quality deteriorated, and the flood of Nenjiang in 1998, more or less, is a result of human's immoderately expanding plantation.

嫩江流域蕴藏着丰富的森林资源、草场资源以及湿地资源，但在现代过程中，由于各种人为因素的影响，无节制的掠夺和耕地扩张，使该区的上述资源已经大面积的减少，环境进一步恶化，98年嫩江大洪水就直接或间接与此有关。

Due to the inclemency of climate and soil conditions and the intense disturbance of human beings,the soil resources heterogeneity in arid and semi arid grassland ecosystems worldwide was gradually increased during the last century.

世界许多干旱、半干旱地区草地生态系统逐渐被灌木生态系统取代，这种取代过程的发展是由灌木冠幅下土壤中"肥岛"的形成和灌木的扩散相互作用直接造成的。

Thereinto, increasing population and development of economy are fundamental reasons for reducing grassland, increasing cropland and series of land use change.

其中，人口增长和经济发展是该地区草地减少、耕地增加，进而导致系列土地利用变化的根本原因。

Winding into the a rid grassland , scrubby vegetation mixed with grasses , and dry , droughty soils will indicate the infrequency of rainfall Design GrouPA,1985

到了草原的边缘，混合的灌木丛与草原植被，及干燥，干旱的土壤表明这里很少降雨。

The results show that the cultivated land area in Wanzhou will slightly decreased while the construction land will slightly increased,forest land will increased dramatically,and it is difficult to improve the ecosystem service value by single increasing the wetland area.Grassland ecological restoration and increasing orchard area will improve the ecosystem service value by comprehensive treatment of geological hazards and soil loss.The ecosystem service theory value in Wanzhou is 11.89 billion yuan each year,the correction value is 10.64 billion yuan each year,and the present value is 9.65 billion yuan each year.This shows the ecological restoration has good economical efficiency.The optimization of land use structures based on ecosystem service value could satisfy the development of social economy with land demand,and realized the benefit of ecology and economy inphase,the study supported a new way to solve the key technical problem in land use programming in China.

计算结果表明：（1）规划期内万州区耕地面积略有减少，建设用地面积有所增加，林地面积有较大幅度增加，大规模增加湿地面积提高土地生态功能价值则难以实现；（2）地质灾害与水土流失综合治理、草地生态系统修复以及适当增加园地面积，能够提高万州区土地生态功能价值；（3）万州区土地生态经济理论价值为11888亿元/a，修正价值为10644亿元/a，均高于现状值9653亿元/a，土地生态修复与建设的生态经济效益可观；（4）基于生态系统服务价值的土地利用结构优化，能够满足社会经济发展对土地的需求并同步实现生态经济效益的最优，为解决土地利用规划中的关键技术问题提供新的方法。

Grassland agriculture is the import part of persistent and ecological agriculture with the most profit of economic and ecology, and it has the broad foreground through the waste reuse, leaf arming and intercrop to established the production system of agriculture in the extraried desert.

通过弃耕地种草、牧草与农作物的轮作倒茬和间作套种技术等，建立集生态效益、经济效益、社会效益三位于一体的草地农业生产，在极干荒漠区具有良好的推广应用前景。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。