久久久无码人妻精品无码_6080YYY午夜理论片中无码_性无码专区_无码人妻品一区二区三区精99

 
  .contact us |.about us

Highlights ... ...
Search:
    Advertisement
Geograghic outline
( 2003-08-24 15:32)

Ningxia Hui Autonomous Region (abbreviated as Ning) is situated by the upper and middle reach of the Yellow River, near the Helan Mountain.The total area of Ningxia is 66,400 square kilometers. Plain 31.5%, hilly land 23.5%, hills 36% and deserts 9%. The cultivatable land is 791,000 hectares (ha). Among them, paddy land 162,000 ha (20.5%), dry land 629,000 ha (79.5%). It is suitable for forestry, husbandry and agriculture. The favorable transport conditions and rich water sunshine resources make this place suitable for industrial and agricultural development.

Yinchuan Plain

Situated in the middle reaches of the Yellow River, it covers an area between Helanshan and Erdousi Plateau, including Yinchuan, Wuzhong and Lingwu city. It is about 150 km long from north to south and 40 km wide from west to east. It is formed from alluvion of the Yellow River. The land is fecund and the sunshine is sufficient. It has a long history of development. The irrigation system has been constructed for a long history period. Because of the above,Yinchuan Plain is of high yield of rice and wheat, fruits and other economic crops.

Weining Plain

Situated in the upper and middle reach of the Yellow River, between the Tengeli desert and the loess plateau, including Zhongwei and Zhongning counties. It is 100 km long from north to south and 150 km wide from west to east,also formed from the alluvion of the Yellow River. Benefiting from the convenient irrigating system, it is also an important production base of Ningxia's agriculture.

South mountainous area

Situated in south of Ningxia, it includes Haiyuan, Guyuan, Xiji, Longde, Jingyuan and Pengyang counties. There are numerous tablelands, hillocks and gullies, making the landform very complicated. It has poor transport condition and inadequate energy reserve. But owing to the semi-wet weather conditions, the mountain area is suitable for forestry and husbandry. The senery in this area is pretty good.It is one of the the tourism resorts of Ning Xia.

Forest

Ningxia belongs to the continental climate zone. Its climate is arid and the rainfall is scarce. There is very limited forest resources. According to the statistics of the Bureau of Forestry, the land of forests is about 835,000 ha, the forest-covered area is 106,000 ha. The forests of Ningxia can be divided into two major types: artificial forest and natural forest. Most of the natural forests are distributed in the Helanshan, Liupanshan and Luoshan. There are 32,000 ha of forest and bushes in these three places, and the living wood storage is about 2,052,200 m3. There are a few parts of natural forest in Lingwu, Yanchi, Qingtongxia, Haiyuan, Zhongwei and Tongxin counties, with a total area of 25,000 ha. The artificial forest is 68,000 ha. It can be sub-classified into shelter forest, commercial forest, economic forest and fuel forest. In the irrigated area of Northern Ningxia, the major task of forestation is to construct farmland shelter. In the middle part, the stress is to plant windbreak and sand-fixation forest. In the south mountainous area, the stress is to plant the water and soil conservation forest. Commercial forests are mainly scattered in the plains and windy, dusty and loess hilly areas. The economic forests are scattered across the whole region. The fuel forests are mainly located in the south mountainous area.

Grassland

There are approximately 301,400 ha of natural grassland in Ningxia. Among them the utilizable area is 2,697,000 ha.Their distribution is: Yinnan Region has 1,920,000 ha, Guyan Region has 681,000 ha, Shizuishan 260,000 ha, and Yinchuan, 155,000 ha. By their quality and yield, they can be classified into five classes and eight grades. In the five classes, the third class appears to be the major part, 55% of the total. In the eight grades, the major one is the sixth grade (1,500~3,000 kg per ha) and the seventh grade (750 ~ 1,500 kg per ha), The total area of these two grades are 2,280,000 ha, 76.1% of the natural grassland. Owing to the complex ecosystem, the grassland mode is also complex. There are 18 modes of grassland in the whole country, of which Ningxia has 11. Besides these natural grassland, there are 83,000 ha of artificial grassland of Ningxia.

Mountains

The major mountains of Ningxia are Helanshan Mountain in the northern part and Liupanshan Mountain in the southern part. Helanshan is 200 km long from north to south and 15 ~ 50 km wide from west to east. Most of its peaks are over 2,000 meters high. The highest is 3,556 meters above sea level. Its west side There is plenty of forest on its west side. Its east side is a fault zone which sits close against Yinchuan plain. It provides a natural shelter in the northern part of Ningxia, stopping the cold current from Siberia and flowing sands from Tengeli. There are several openings in these mountains as important lines of transport. The Liupanshan Mountain cuts across Shaanxi, Gansu and Ningxia. It goes from south to north, about 240 km, most parts are over 2,000 meters elevation. The highest peak has the elevation of 2,942 meters, being the headstream of Jing River and Wei River. Because the ways to its top are much curved and there are 6 sharp turns from the foot to the top, it is called Liupanshan Mountain. Besides, there are other middle-scale mountains like Nanhuashan, Xihuashan, Yueliangshan, Luoshan, Xiangshan, Yunwushan and Niushoushan mountains in Ningxia.

   
Close  
  Go to Another Section  
     
 
 
     
  Article Tools  
     
  E-Mail This Article
Print Friendly Format
 
     
   
        .contact us |.about us
  Copyright By chinadaily.com.cn. All rights reserved  
久久久无码人妻精品无码_6080YYY午夜理论片中无码_性无码专区_无码人妻品一区二区三区精99

    国产福利91精品一区二区三区| 国产电影一区在线| 欧美一区二区女人| 国内成人精品2018免费看| 国产精品三级视频| 日本精品视频一区二区三区| 亚洲高清三级视频| 久久综合九色综合97_久久久| 国产馆精品极品| 日韩美女视频19| 欧美日韩亚洲综合在线| 秋霞午夜av一区二区三区| 国产亚洲视频系列| 色婷婷av一区| 日本成人在线不卡视频| 久久精品欧美日韩精品| 色拍拍在线精品视频8848| 蜜桃久久av一区| 国产精品全国免费观看高清| 欧洲在线/亚洲| 久久99精品视频| 成人欧美一区二区三区1314 | av激情综合网| 天天综合日日夜夜精品| 久久伊99综合婷婷久久伊| 色综合久久中文综合久久97| 蜜桃视频一区二区三区在线观看| 国产精品色呦呦| 91精品午夜视频| 成人免费福利片| 日本视频一区二区| 中日韩av电影| 91精选在线观看| 99久久夜色精品国产网站| 日本一不卡视频| 国产精品日韩精品欧美在线| 56国语精品自产拍在线观看| 成人免费毛片嘿嘿连载视频| 石原莉奈在线亚洲二区| 亚洲国产精品黑人久久久| 欧美三级午夜理伦三级中视频| 国产精品资源站在线| 亚洲一区二区三区影院| 久久久久久免费毛片精品| 欧美日韩一区小说| 成人开心网精品视频| 日韩va亚洲va欧美va久久| 18成人在线观看| 26uuu色噜噜精品一区二区| 欧美又粗又大又爽| 国产91精品欧美| 免费视频最近日韩| 亚洲资源中文字幕| 日本一区二区免费在线 | 欧美国产日韩亚洲一区| 欧美妇女性影城| 色综合久久88色综合天天免费| 激情丁香综合五月| 视频在线观看一区| 亚洲乱码中文字幕综合| 国产女人18毛片水真多成人如厕 | 亚洲a一区二区| 中文字幕一区日韩精品欧美| 精品国产一区二区三区不卡 | 99久久精品免费精品国产| 九九久久精品视频| 午夜国产精品影院在线观看| 亚洲男女一区二区三区| 国产三级精品在线| 精品国产99国产精品| 欧美精品粉嫩高潮一区二区| 色噜噜狠狠一区二区三区果冻| 国产99久久久国产精品免费看| 久久国产婷婷国产香蕉| 视频一区国产视频| 亚洲一区二区中文在线| 亚洲人成网站在线| 亚洲欧美自拍偷拍色图| 欧美国产精品一区二区三区| 欧美精品一区二区不卡 | 国产午夜精品在线观看| 日韩精品一区二区三区四区视频| 精品视频在线免费看| 色综合久久88色综合天天6| bt7086福利一区国产| 国产99久久久久| 国产成人午夜99999| 国产精品自产自拍| 国产麻豆精品在线观看| 久久成人羞羞网站| 麻豆免费精品视频| 美女网站在线免费欧美精品| 日本美女视频一区二区| 奇米777欧美一区二区| 日本欧美在线观看| 日韩国产精品久久久久久亚洲| 天天色综合成人网| 日韩黄色免费电影| 日韩中文字幕麻豆| 免费观看成人av| 久久黄色级2电影| 精品一区二区三区免费| 久久91精品久久久久久秒播| 国内一区二区在线| 国产经典欧美精品| 成人一区二区三区| 99视频精品在线| 色吊一区二区三区| 欧美亚一区二区| 欧美军同video69gay| 日韩欧美在线123| 欧美久久久久免费| 日韩片之四级片| 欧美一区二区三区四区在线观看| 欧美人与性动xxxx| 欧美精品在线观看一区二区| 6080国产精品一区二区| 日韩欧美成人激情| 久久―日本道色综合久久| 欧美极品美女视频| 中文字幕一区视频| 亚洲午夜在线视频| 天天操天天综合网| 国产自产高清不卡| 成人免费av网站| 色天使久久综合网天天| 欧美日产国产精品| 日韩精品一区二区三区视频播放 | 欧美一区二区三区四区视频| 欧美不卡一区二区三区| 久久在线免费观看| 亚洲人成精品久久久久久| 伊人夜夜躁av伊人久久| 日产欧产美韩系列久久99| 国产精品一线二线三线精华| www.视频一区| 欧美人妖巨大在线| 精品久久久久久综合日本欧美| 国产色爱av资源综合区| 亚洲精选视频在线| 蜜桃传媒麻豆第一区在线观看| 粉嫩欧美一区二区三区高清影视| 色综合一区二区三区| 欧美一级免费观看| 欧美国产精品一区二区| 艳妇臀荡乳欲伦亚洲一区| 欧美国产精品一区二区| 欧美国产精品一区二区三区| 亚洲精品国产高清久久伦理二区| 亚洲成人精品一区| 国内偷窥港台综合视频在线播放| 成人91在线观看| 欧美日本韩国一区二区三区视频| 亚洲精品一区二区三区在线观看| 中文字幕一区在线观看| 偷偷要91色婷婷| 大胆欧美人体老妇| 欧美日韩精品是欧美日韩精品| 久久久久99精品一区| 一级精品视频在线观看宜春院| 精品影院一区二区久久久| 色综合天天性综合| 欧美精品一区二区三区蜜臀| 一个色妞综合视频在线观看| 国内久久精品视频| 欧美亚洲综合网| 国产欧美日韩在线视频| 日本亚洲欧美天堂免费| av在线免费不卡| 欧美电影免费观看高清完整版| 亚洲欧美成人一区二区三区| 国产中文字幕精品| 欧美日韩在线直播| 国产精品久久久久久久久动漫 | 国产精品一线二线三线精华| 欧美午夜影院一区| 欧美精彩视频一区二区三区| 日韩电影在线观看网站| 91日韩精品一区| 国产性色一区二区| 婷婷六月综合网| 色婷婷综合久色| 国产午夜亚洲精品羞羞网站| 日韩影院精彩在线| 91免费看`日韩一区二区| 2023国产一二三区日本精品2022| 亚洲风情在线资源站| 成人黄色电影在线| 精品卡一卡二卡三卡四在线| 亚洲电影欧美电影有声小说| 99久久精品免费精品国产| 久久综合中文字幕| 日韩电影在线一区| 欧美主播一区二区三区美女| 成人欧美一区二区三区1314| 国产一区二区h| 日韩欧美中文一区二区| 午夜亚洲福利老司机| 色偷偷一区二区三区| 国产精品免费看片|