Alpine meadow and wetland,closely correlated with the amount of water stock in the riverhead of China,is the most important ecosystem of the Qinghai-Tibetan Plateau.This ecosystem is the primary support for the industrial and agricultural and the living using water in the middle east of China,which makes the conservation of alpine meadow and wetland in the Qinghai-Tibetan Plateau have importantly practical significance.

高寒草甸及濕地是青藏高原上最為重要的生態(tài)系統(tǒng)，它的狀況直接關(guān)系到我國江河源頭的蓄水量国产精品自产拍在线观看看，也關(guān)系到我國中部和東部廣大地區(qū)的工農(nóng)業(yè)及人民生活用水26uuu网址，因此對青藏高原高寒草甸與濕地的保護具有重要的現(xiàn)實意義。

On the river where the water-meadow are fresh and green, and the stream sparkles on among pleasant islands, murmuring weirs, and whispering rushes...

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The effect of Zea mays and Bromus riparius on soil and water loss were studied,the experiment was conducted to plant crop and grass in runoff-plots on the 15 degree slope naturally,the bare slop is CK,then the runoff and soil erosion amount and the biological characteristics of corn and meadow bromes termly were measured,and difference of soil and water loss prevention effect on the slop land were determined.The results showed that soil and water loss became less after both corn and meadow brome planting.And the leaf area and the coverage of meadow brome higher than corn,which was benefit for less soil and water loss at the rain season early.Meanwhile,roots of corn and meadow brome mainly distributed in 0-10 cm soil layer,and the root biomass of meadow brome was 2.88 times than that of corn.

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On the banks of the Nederrijn River is Loowaard, a beautiful stretch of water meadow between the dykes.

在下萊茵河分支的岸邊是勞渥德，延伸在堤壩之間的一片美麗的水草牧場中文字幕毛片网址。

In the foreground a water meadow with some tiny cows, two brushstrokes each, but confidently cows; two minuscule white geese in the blue water, back-to-back, feeding, and a slanting stick.

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The results are as follows: 1 great changes have taken place in land use and landscape pattern from 1995 to 2000; the area of woodland, water and unused land has been reduced and that of grassland, cropland and construction land increased; 2 the advance of fractal dimensions, the diversity index and landscape fragmentation degree showed that landscape units became strongly fragmented; 3 the dominant degree of construction and unused land has changed little but that of meadow and water increased, and that of farmland and woodland decreased to some extent, which indicated that the trend of landscape pattern changed from cropland and woodland to meadow and water; 4 the changes of land use and landscape patterns near the road are obvious and it is urgent to strengthen eco_environment protection.

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First, classify the birds to group fitted for water, meadow, shrub and prey, and count their biodiversity respectively, then give different weight on ecology information.

原理是通過分別計算反應(yīng)不同樣區(qū)內(nèi)水體、植被覆蓋率及干擾等景觀因素的代表種——水禽日韩精品专区一区二区、林鳥久久R99视频、猛禽、人類伴生種及適于農(nóng)田生活鳥類——的多樣性以及分類多樣性黄色片看看一区二区，再賦予不同的權(quán)重綜合起來国产91在线视频免费。

And than the soil water contents of mountainous meadow was intervenient. The diversification of soil bulk density was completely reverse with the soil water contents. The soil bulk density of alpine meadow and sub alpine meadow was evidently lower than hilly meadow steppe and alluvial flat meadow steppe.

高山和亞高山草地類型的土壤含水量明顯高于低山丘陵和河灘階地的類型，而中山類型的草地土壤含水量在它們中間欧美精品日韩精品l视频；土壤容重的變化趨勢則完全相反A片无遮挡无码免费视频网站，高山和亞高山草地類型的土壤容重明顯低于低山丘陵和河灘階地的類型。

The soil water contents of alpine meadow and sub alpine meadow was evidently higher than hilly meadow steppe and alluvial flat meadow steppe.

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Plateau basin surrounding karst groundwater resources to strengthen the investigation and identify the volume of 998 million cubic meters of mined / year; Southwest karst areas to 180 billion cubic meters of underground water resources / year, the volume of 77 billion cubic meters of mined / year; Southwest completed eight provinces 339 counties 740,000 square kilometres trees remote sensing surveys; Preliminary identification of the geological environment of the Yellow River source region ecological conditions change, first proposed the freezing cold caused a drop in water level at Sheung Shui and Yuen district water meadow degradation of the important reasons for the deterioration of the environment.

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