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《Resources and Environment in the Yangtze Basin》 2008-02
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IMPACT OF CLIMATIC VARIATION ON NET PRIMARY PRODUCTIVITY OF NATURAL VEGETATION IN JIANGXI IN RECENT 40 YEARS

ZENG Hui-qing1,2,3,4,LIU Qi-jing2,YIN Jian-min5,FENG Zong-wei1(1.State Key Laboratory of Urban and Regional Ecology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China;2.Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China;3.Environmental Science and Engineering College of Nanchang University,Nanchang 330029,China;4.Graduate University of Chinese Academy of Sciences,Beijing 100039,China;5.Meteorological Science Institute of Jiangxi Province,Nanchang 330046,China)  
According to the trend of global climate changes,impact of climatic variation on net primary productivity(NPP)of natural vegetation in three regions,Nanchang,Ji'an and Ganzhou,in Jiangxi Province in recent 40 years was studied.The change trend was simulated based on combinations of thermal and hydrological conditions.Also,NPP pattern of the whole region of Jiangxi Province was analyzed with vegetation productivity in 1980s.The average values of NPP in the three regions during past 40 years were 13.19,13.11,and 13.20 t/hm2·a,respectively,showing an overall tendency of slight increase.Based on the presumption that the temperature and precipitation increased by 2℃ and 20%,respectively,the value of NPP would ascend by 14.9%~15.85%.When the temperature and precipitation increased by 2℃ and-20%,respectively,it would decreased by 4.77%~5.16%.For the scenario of increased temperature(+2℃)and unchanged precipitation,the increase of NPP was predicted as 5.30%~5.69%.A radius form from the center to east,south and west characterized the spatial pattern of NPP distribution,and it declined from mountains to hills and plains.
【Fund】: 国家重大基础研究项目(编号2002CB4125);; 中国科学院资源环境科学与技术局生态野外台站基金项目
【CateGory Index】: Q948
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