Chang, Genzhu

Yang, Hongshan

Zhou, Xuehui

English

University of Kentucky

University of Kentucky UKnowledge International Grassland Congress Proceedings XXI International Grassland Congress / VIII International Rangeland Congress Dividing the Ecological Environmental Area for the Northwest Dry Grassland of China Genzhu Chang Chinese Academy of Agricultural Sciences, China Xuehui Zhou Chinese Academy of Agricultural Sciences, China Hongshan Yang Chinese Academy of Agricultural Sciences, China Follow this and additional works at: https://uknowledge.uky.edu/igc  Part of the Plant Sciences Commons, and the Soil Science Commons This document is available at https://uknowledge.uky.edu/igc/21/24-1/5 The XXI International Grassland Congress / VIII International Rangeland Congress took place in Hohhot, China from June 29 through July 5, 2008. Proceedings edited by Organizing Committee of 2008 IGC/IRC Conference Published by Guangdong People's Publishing House This Event is brought to you for free and open access by the Plant and Soil Sciences at UKnowledge. It has been accepted for inclusion in International Grassland Congress Proceedings by an authorized administrator of UKnowledge. For more information, please contact UKnowledge@lsv.uky.edu. 瞯 ]1142　 瞯 　 Multifunctional Grasslands in a Changing World 　 Volume Ⅱ 　Grasslands/Rangelands People and Policies——— China Grassland/Rangeland Forum (no posters)Dividing the ecological environmental area for the northwest dry grassland of ChinaGen‐z hu Chang ,Xue‐hui Zhou and Hong‐shan Y angLanzhou Institute o f A nimal & Veterinary Pharmaceutics Sciences ,Chinese A cademy o f A gricultural Sciences ,L anz hou730050 ,Key testing station f or scienti f ic observ ation in w ild f ield on ecology and env ironment o f Loessp lateau o fA griculture M inistry , E‐mail :chang5637＠ 163 .com .Key words : dry grassland , ecological environment , study of divisionIntroduction The distribution of dry grassland in the northwest China covers １７１ Manchu administrative divisions , counties andcities of ６ northwest provinces and autonomous regions , including Inner Mongolia , Gansu , Ningxia , Xingjiang , Shanxi ,andQinghai , The total surface area is １２９ ,６５０ ,０００ hm２ ,It is an important ecological resource and livestock production area ofchina . This classification together with pertinent theories and viewpoints will be used to implement ecological and environmentalreconstruction in West ChinaMethods Analysis of four indices( geographical position , climate , soil texture , and plant communities ) , were used to that thenorthwest dry grassland can be divided into four ecological areas . Manipulative disposal point in the area , classify and analysisbasal datum ,supplement correlative datum and seeing about typical area on the spot .Results (１) The Plateau , basin dry desert ecological area : It includes the Helan Mountain , west of the Yellow River , Ningxia ,Mongolia , Gansu , Qinghai and the Chaidamu basin to the end of Xinjiang ,which shows a zoned distribution from east to west ,covering ４４ ,９７２ ,８００ hm２ , there are Brown Salc soils , Sierozems soils , grey‐Brown desert soils ,and a lot of windblown sandysoils . The plant covers consists of drought‐resistant shrubs and sub‐shrubs , including someperennial herbs . (２) The ecologicalarea of arid and semiarid grasslands in the Loess Plateau : It is distributed closely on a line in the Long Dong area , fromLongzhong to Lanzhou city in the northwest . The biggest surface is ２ ,６９０ ,０００hm２ in Gansu . The main terrain feature of theLoess Plateau is a large number of hills ８００‐１８００m in height . The climate type is dominated by arid and semiarid . The mainplant cover is herbaceous plants , covering most of the soil surface . ( ３ ) The farm‐pastoral belt of the Tibet plateau and theLoess plateau : It is distributed ５ counties and １ city of Gansu and Qinghai . The main landforms are river valleys and hillsides ,and the secondary are lower hills .The main soil texture is carbonate soil including sierozems soils and Chestnut soils . The Plantcovers consist mainly of drought‐resistant perennial herb or lower sub‐shrub . ( ４ ) Man‐made grassland ecological area : Itincludes Artificial turf , semi‐artificial turf and various green lawn .Table 1 Simp le table o f ecological areas div ision .The Plateau and basinecological area Arid and semiaridecological area Farm‐pastoral beltecological area Man‐made grasslandecological areaTerrain Plateau ,Basin Hill ,beam Valley , mountain Mountain ,PlainClimate Extremely drought Arid and semiarid Cold ,drought Suitable for farmingPlant Shrubs and sub‐shrubs Herbaceous plants Stress‐resistance perennialherb Man‐made grasslandSoil Sandy soils Chestnut soil , black loam Chestnut soil , ash brownsoil Farmland SoilConclusions After study , northwest grassland was divided into four areas , including : The Plateau , basin dry desert ecologicalarea ; The ecological area of arid and semiarid grasslands in the Loess Plateau ; The farm‐pastoral belt of the Tibet plateau andthe Loess plateau and Man‐made grassland ecological area .

Dividing the Ecological Environmental Area for the Northwest Dry Grassland of China

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Dividing the Ecological Environmental Area for the Northwest Dry Grassland of China

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