www射-国产免费一级-欧美福利-亚洲成人福利-成人一区在线观看-亚州成人

   
  home feedback about us  
   
CHINAGATE.WEST DEVELOPMENT.sustainable development & environment    
    Key Issues  
 
  Sustainable development & environment  
  Industrial restructuring  
  Infrastructure  
  Market mechanism  
  Capital market  
  High-tech  
  Education & HR  
  Overseas Investment  
  Minority prosperity  
  East-west cooperation  
  Agriculture  
  Travel  
 
 
       
       
       
     
       
       
       
       
 
 
 
Grassland ecosystem deteriorating in Qinghai-Tibet Plateau


2003-12-07
Xinhua

The grassland ecosystem in the Qinghai-Tibet Plateau has shown a gradual-deterioration trend with its output decreased sharply due to long-term excessive herding.

The throughput of the grassland dropped from 4,500 kilograms in 1960s to the current 1,500 kilograms per hectare while the amount of field mice rose from 8-10 per hectare to over 30, said Du Guoqin, professor of Lanzhou University.

The naked land is spreading over 30 percent of the total area with the rest covered with more poisonous weed, Du said.

The Qinghai-Tibet Plateau has been one of China's important pasturing areas from of old for its ample grassland resource, forming a particular ecosystem, which covers the largest area and at the highest water level in the world.

The plateau is also the birthplace of the Yangtze and Yellow rivers. Its ecological situation can directly affect the fundamental interests, even the existence and development, of the Chinese nation, according to Du.

He said the deteriorating condition of the ecosystem has caused large amount of livestock to die.

 

 
   
 
home feedback about us  
  Produced by m.orobotics.cn. All Rights Reserved
E-mail: webmaster@chinagate.com.cn
主站蜘蛛池模板: 欧美经典成人在观看线视频 | 成年人免费网站视频 | 免费看成人毛片日本久久 | 免费一级毛片免费播放 | 亚洲精品一二三区-久久 | 亚洲免费视频网站 | 老少配性xxxxxx | 最新国产美女肝交视频播放 | 国内自拍视频在线看免费观看 | 久久精品亚洲精品国产欧美 | 乱淫网站| 91久久国产视频 | 精品国产一区二区三区在线观看 | 久久国产精品视频一区 | 欧美在线高清视频播放免费 | 大陆精品自在线拍国语 | 国产一区二区成人 | 亚洲国产欧洲精品路线久久 | 国产精品区一区二区免费 | 给我一个可以看片的www日本 | 精品网址 | www.午夜| 三级黄色免费看 | 精品日韩二区三区精品视频 | 香蕉521av网站永久地址 | 日本三级久久 | 91久久国产综合精品 | 欧美毛片一级的免费的 | 国产一区二区免费不卡在线播放 | 涩涩国产精品福利在线观看 | 国产在线精品香蕉综合网一区 | 亚洲精品一区专区 | 亚洲欧美日韩综合一区久久 | 亚洲美女自拍视频 | 欧美黄色免费网站 | 亚洲欧美日韩国产综合高清 | 日本一级aaaa特黄毛片 | 久久一本精品久久精品66 | 免费日韩在线视频 | 国产精品成人一区二区 | 欧美激情免费a视频 |