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当前位置: 首页 > 文章 > 西藏高寒草地净初级生产力变化及其对退牧还草工程的响应 中国草地学报 2014,36 (4) 5-12
Position: Home > Articles > The Variability of Grassland Net Primary Production in Tibet and its Responses to No Grazing Project Chinese Journal of Grassland 2014,36 (4) 5-12

西藏高寒草地净初级生产力变化及其对退牧还草工程的响应

作  者：
孙银良;周才平;石培礼;宋明华;熊定鹏
单  位：
中国科学院地理科学与资源研究所/生态系统网络观测与模拟重点实验室
关键词：
CASA模型;NPP变化;西藏;退牧还草工程;MODIS
摘  要：
利用MODIS数据,基于CASA模型模拟估算了2001～2012年西藏高寒草地净初级生产力,并对西藏高寒草地NPP变化及其对退牧还草工程的响应情况进行了研究。结果表明,西藏高寒草地NPP均值为122gC/m2·a,总量为9.34×1013gC,自东南向西北方向逐渐减少,12年来以每年0.96gC/m2的速率波动上升,与水热组合条件变化明显相关;退牧围栏区域高寒草地NPP具有显著上升趋势,围栏以后高寒草地NPP平均增长23.84gC/m2,平均增比达10.8%;退牧围栏区域中,高寒草甸NPP在增量、增比、上升趋势上都明显高于高寒草原的NPP,退牧还草工程草地恢复效果与草地类型明显有关。
译  名：
The Variability of Grassland Net Primary Production in Tibet and its Responses to No Grazing Project
作  者：
SUN Yin-liang;ZHOU Cai-ping;SHI Pei-li;SONG Ming-hua;XIONG Ding-peng;Key Laboratory of Ecosystem Network Observation and Modeling,Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences;University of Chinese Academy of Sciences;
关键词：
CASA model;;NPP change;;Tibet;;No grazing project;;MODIS
摘  要：
Using CASA model based on MODIS data,net primary production(NPP)of alpine grassland in Tibet was estimated from year 2001 to 2012.According to the simulated results,the variability of NPP of alpine grassland in Tibet and its responses to no grazing project were analyzed.The results showed that the NPP of Tibetan alpine grassland was 122gC·m-2·a-1,total amount was 9.34×1013 gC,and was gradually reduced from southeast to northwest,and was increased in fluctuating state at rate of 0.96gC·m-2 in 12 years,having a significant correlation with hydro-thermal combination.The NPP of alpine grassland in no grazing area had a significant upward trend,NPP of alpine grassland enclosed was increased by 23.84gC·m-2 in average and increment ratio was 10.8% in average;NPP of alpine meadow was significantly higher than the NPP of alpine grassland in increment and increment ratio and uptrend in no grazing area,the restoration effects of no grazing project were significantly correlated to grassland types.

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