RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2008, Vol. 17 >> Issue (2): 227-227.

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IMPACT OF CLIMATIC VARIATION ON NET PRIMARYPRODUCTIVITY OF NATURAL VEGETATION IN JIANGXI IN RECENT 40 YEARS

ZENG Huiqing   

  • Received:1900-01-01 Revised:1900-01-01 Online:2008-03-20

Abstract:

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/hm2〖DK1〗·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.

Key words: net primary productivity (NPP), vegetation, climate change, Jiangxi Province

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