Fei, Ling

Gan, Youmin

Luo, Yuanjia

Qiu, Ying

Wang, Qin

Wang, Yanchun

English

University of Kentucky

University of Kentucky UKnowledge International Grassland Congress Proceedings 21st International Grassland Congress / 8th International Rangeland Congress Preliminary Study on Classified Index System of Grazing Subalpine Meadow in Northwest Sichuan Youmin Gan Sichuan Agricultural University, China Ying Qiu Sichuan Agricultural University, China Yuanjia Luo Sichuan Agricultural University, China Qin Wang Sichuan Agricultural University, China Ling Fei Sichuan Agricultural University, China See next page for additional authors 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/21/6-1/15 The 21st International Grassland Congress / 8th 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. Presenter Information Youmin Gan, Ying Qiu, Yuanjia Luo, Qin Wang, Ling Fei, and Yanchun Wang This event is available at UKnowledge: https://uknowledge.uky.edu/igc/21/6-1/15 　 Multifunctional Grasslands in a Changing World 　 Volume Ⅰ 　 瞯 ]737　 瞯Grasslands/Rangelands Resources and Ecology ——— Reclamation of Grasslands/RangelandsPreliminary study on classified index system of grazing subalpine meadow in northwest SichuanGA N You‐min , QIU Y ing , LUO Yuan‐Jia , WA NG Qin , FEI L ing , WA NG Y an‐ChunDepartment o f G rassland Science , S ichuan A gricultural University , Y a摧an , CH INA ,E‐mail : ganyoumin1954＠ 163 .comKey words : subalpine meadow , grazing degradation , standing crop , organic matter content ,index system of evaluationIntroduction Through studies in north‐west of Sichuan , a study on an index system of degraded grassland was conducted whichhas a practical and instructional function for the ecological regeneration of grassland .Materials and methods A study using method of spatial changes in place of temporal changes on grazing subalpine meadow wasconducted in northwest of Sichuan Province . According to the standing crop , the theoretical grazing feed intake , the area andthe time of grazing grassland , the grazing degree was determined as ４ levels : zero ( CK ) , slight ( SG ) , moderate ( MG ) , andheavy( HG) in which the randomly‐selected １m２ quadrat sampling was conducted for ５ times . Record and description of thecommunity characteristic were conducted . Soil of ０ to ３０ cm , area of which was １００ cm２ , was taken using trench method from５ randomly selected points . Every １０ cm deep accounted for a layer . A general soil analysis was conducted .Results The correlation of total coverage of community between HG and MG was significant ( P ＜ ０ .０５ ) . But correlationbetween SG and MG was insignificant ( P ＞ ０ .０５ ) . Total coverage of community , richness and biodiversity were advisable assecondary indexes . There were ２ ～ ３ indicators plants for moderate and heavy degradation , such as Potentilla anserina ,Ranunculus tanguticus , Plantago dep ressa . Standing crop in plant community and variety range of organic matter content oftop ０ ～ １０ cm soil could be direct indexes . ( Table １)Table 1 The classi f ied index system o f degraded grassland o f subalp ine meadow .Index( Primary indices)ZeroDegradation SlightDegradation ModerateDegradation HeavyDegradationPNP AG biomass ( ％ ) Few ＜ １０％ A few １０ ～ ２０％ Abundant ２０ ～ ３０％ Mostly PNP ＞ ３０％Ground Coverage Few bare‐ground A few bared Abundantly bared VE disappears or baredAG Biomass( kg / hm２ ) ＞ ９０００ 儋６５００ ～ ９０００ 苘４０００ ～ ６５００ 倐＜ ４０００ 3０‐１０cm OM ( g / kg ) ＞ １００ 侣６５ ～ １００ 棗４５ ～ ６５ &＜ ４５  Soil Surface Hardly eroded Seldom eroded Rather eroded Eroded( AG ＝ Above Ground ; PNP ＝ Poisonous and Noxious Plants ; OM ＝ Organic Matter ; VE ＝ Vegetation)Conclusions In allusion to the degradation characteristics and degrees of subalpine meadow in North‐west Sichuan , poisonousand noxious plants above‐ground biomass , ground coverage , above‐ground biomass , organic matter of ０‐１０cm soil and soilsurface condition are advisable as primary indices in this area .ReferencesGAN You‐min , LI Zhi‐dan , ZE Bai et al . (２００５) . The Changes of Grassland Soil Nutrition at Different Degradation SubalpineMeadow of Northwest in Sichuan . A cta Prataculturae Sinica , ４ , ３８‐４２ .GAN You‐min , LI Zhi‐dan , WANG Qin et al . ( ２００５ ) . Study On Grazing Degenerating Succession of Subalpine Meadow inNorthwestern of Sichuan Province . A cta Prataculturae Sinica , １３ , ４８‐５２ .

Preliminary Study on Classified Index System of Grazing Subalpine Meadow in Northwest Sichuan

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Preliminary Study on Classified Index System of Grazing Subalpine Meadow in Northwest Sichuan

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