Ai, Likun

Shiyomi, Masae

Yi, Ruhan

English

University of Kentucky

University of Kentucky UKnowledge International Grassland Congress Proceedings 21st International Grassland Congress / 8th International Rangeland Congress Grassland Production under Various Meteorological Conditions in Xilingol, Inner Mongolia, China Ruhan Yi Jinan University, China Masae Shiyomi Ibaraki University, Japan Likun Ai Chinese Academy of 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/21/8-1/44 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. 瞯 ]912　 瞯 　 Multifunctional Grasslands in a Changing World 　 Volume Ⅰ 　Grasslands/Rangelands Resources and Ecology ——— Climate Change and Impact on Grasslands/RangelandsGrassland production under various meteorological conditions in Xilingol , Inner Mongolia ,ChinaY iruhan1 , Masae Shiyomi2 , A ilikun31 Jinan University , College o f Science and Engineering , H uangpuDadao X i 601 , Guangz hou , China ( E‐mail : ty iruhan＠j nu .edu .cn)2 Ibaraki University , Pro f essor Emeritus , Bunkyo 2‐1‐1 , M ito , Japan ; 3 Institute o f A tmospheric Physics , CA S , Bei j ing100029 , ChinaKey words : grassland production , Inner Mongolia , meteorological patterns , prediction , steppeIntroduction In the area of the Xilingol steppe in Inner Mongolia , farmers were previously nomadic . Today , however , theygraze mainly sheep and goats at permanent residences . The meteorological characteristics of this area are long , severe winters ,warm summers , and little rainfall . Primary and secondary grassland productions are largely restricted by these meteorologicalconditions . In the present situation , long term meteorological forecasts by observatories are impossible , we propose analternative method .　 　 Figure 1 System model o f the X ilingol step peecosystem .Materials and methods A system model was used to analyze the Xilingolsteppe ecosystem ( Figure １ ) . Meteorological data on daily mean airtemperature and rainfall from １９５３ to ２０００ ( ４８ yrs ) were numericallyclassified into six typical year patterns using １０‐day means/ totals ofthese meteorological variables from April to October , which is thegrowing season for grassland vegetation , based on a numericalclassification technique ( k‐means) .Results and discussion The six meteorological patterns in Xilingol areshown in Figure ２ . We applied the system model to each meteorologicalpattern . The simulated results for aboveground biomass of grasslandvegetation from ２０ April to １０ September are shown in Figure ２ .Meteorological Pattern １ , which has little rain in summer , ischaracterized as drought and there is little plant biomass . The plantbiomass of pattern ４ , which has relatively little rainfall in earlysummer , follows pattern １ . The other patterns have more rainfall insummer and plants show vigorous grow th . Farmers can select anexpected meteorological pattern based on the present weatherconditions and their empirical knowledge , predict grasslandproduction , and plan a grazing schedule . This procedure may not onlyassist in the creation of a grazing schedule but also help preventdegradation and desertification , and facilitate the recovery ofproduction .Figure 2 Changes in solar radiation (M j / ha/ day ) , air temperature ( ℃ ) , rain f all (mm/day ) and biomass (１０２ kg/ ha) f or the six meteorological patterns .Pattern 1 20 40 60 80 100 120 140 Days from April 21 Pattern 2 20 40 60 80 100 120 140 Days after April 21 Days after April 21 40 35 30 25 20 15 10 5 00 20 40 40 35 30 25 20 15 10 5 00 20 40 Temperature Rainfall 60 80 100 Days after April 21 Days after April 21 ~ Pattern 4 140 Pattern 5 120 140 

Grassland Production under Various Meteorological Conditions in Xilingol, Inner Mongolia, China

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Grassland Production under Various Meteorological Conditions in Xilingol, Inner Mongolia, China

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