近40年气候变化对江西自然植被净第一性生产力的影响  

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

作　　者：曾慧卿[1] 刘琪璟[2] 殷剑敏[3] 冯宗炜[1] 

机构地区：[1]中国科学院生态环境研究中心城市与区域生态国家重点实验室,北京100085 [2]中国科学院地理科学与资源研究所,北京100101 [3]江西省气象科学研究所,江西南昌330046

出　　处：《长江流域资源与环境》2008年第2期227-231,共5页Resources and Environment in the Yangtze Basin

基　　金：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

摘　　要：根据全球气候变化的趋势,采用植被净第一性生产力模型,对江西省南昌、吉安、赣州3地近40年气候变化对自然植被净第一性生产力（NPP）的影响进行研究,并模拟了3地自然植被NPP在未来气候3种水热条件下的变化趋势。此外还以1980年江西全省自然植被NPP为例分析了自然植被NPP的区域分布特征,结果表明：3地近40年自然植被NPP平均值分别为13.19、13.11和13.20t/hm^2·a,总体上都呈上升的趋势。当年均气温增加2℃且降水量增加20%时,NPP值增加了14.9%～15.85%;随着年均气温增加2℃且降水量减少20%,NPP减少了4.77%～5.16%;当年均气温增加2℃且降水量不变时,NPP增加了5.30%～5.69%。江西自然植被NPP区域分布特征由东、南、西3个方向向北呈放射状分布,随着地形由高山向丘陵、平原的方向变化而减小。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·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.

关 键 词：净第一性生产力 植被 气候变化 江西省 

分 类 号：S127[农业科学—农业基础科学] P467[天文地球—大气科学及气象学]