| 中国西南地区西双版纳不同时期橡胶林生态系统的碳储量变化 |
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| 作者姓名： | SUN Yanci MA Youxin CAO Kunfang LI Hongmei SHEN Jinxiang LIU Wenjun DI Liang MEI Cencen |
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| 摘 要： | Rubber(Hevea brasiliensis) plantations have been expanded rapidly in tropical regions of Southwest China and cover more than20% of land area in Xishuangbanna.Several studies have addressed changes of soil C stocks in rubber plantations;however,estimates of total ecosystem C stocks and their temporal changes in rubber plantations have been inadequately studied.This study calculated C stocks in soil,biomass,litter,and dry rubber(latex),and estimated the total ecosystem C stocks of rubber plantations in an age sequence of 3-,7-,9-,21-,27-,and 34-year-old in Xishuangbanna,Southwest China.The total C stocks in rubber plantations ranged from 150.3 to 283.7 Mg C ha~(-1),with a mean of 213.4 Mg C ha~(-1).The plantations≤9-year-old had significantly lower(P0.05)total C stocks than those older than 9 years.Carbon stocks in soil(mass equivalent) were between 107.1–170.5 Mg C ha~(-1) and in living biomass were between 2.8–95.7 Mg C ha~(-1),representing the largest and the second largest C components in a rubber plantation ecosystem.Neglect of dry rubber C stock resulted in an underestimate of 7.8%–14.2% of the total C stock in the rubber plantations older than 9 years,which was much larger than the contribution of litter C stock(less than 2%).
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| 关 键 词： | age sequence carbon sequestration dry rubber Hevea brasiliensis litter |
Temporal changes of ecosystem carbon stocks in rubber plantations in Xishuangbanna, Southwest China |
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| SUN Yanci,MA Youxin,CAO Kunfang,LI Hongmei,SHEN Jinxiang,LIU Wenjun,DI Liang,MEI Cencen.Temporal changes of ecosystem carbon stocks in rubber plantations in Xishuangbanna, Southwest China[J].Pedosphere,2017,27(4):737-746. |
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| Authors: | SUN Yanci MA Youxin CAO Kunfang LI Hongmei SHEN Jinxiang LIU Wenjun DI Liang and MEI Cencen |
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| Institution: | 1. Center for Integrative Conservation, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun 666303 China;Yunnan College of Business Management, Kunming 650106 China;University of Chinese Academy of Sciences, Beijing 100094 China;2. Center for Integrative Conservation, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun 666303 China;3. State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, and College of Forestry, Guangxi University, Nanning 530004 China;4. Yunnan Land and Resources Vocational College, Kunming 650217 China;5. Center for Integrative Conservation, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun 666303 China;Yunnan College of Business Management, Kunming 650106 China |
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| Abstract: | Rubber (Hevea brasiliensis) plantations have been expanded rapidly in tropical regions of Southwest China and cover more than 20％ of land area in Xishuangbanna.Several studies have addressed changes of soil C stocks in rubber plantations;however,estimates of total ecosystem C stocks and their temporal changes in rubber plantations have been inadequately studied.This study calculated C stocks in soil,biomass,litter,and dry rubber (latex),and estimated the total ecosystem C stocks of rubber plantations in an age sequence of 3-,7-,9-,21-,27-,and 34-year-old in Xishuangbanna,Southwest China.The total C stocks in rubber plantations ranged from 150.3 to 283.7 Mg C ha-1,with a mean of 213.4 Mg C ha-1.The plantations ≤ 9-year-old had significantly lower (P ＜ 0.05) total C stocks than those older than 9 years.Carbon stocks in soil (mass equivalent) were between 107.1-170.5 Mg C ha-1 and in living biomass were between 2.8-95.7 Mg C ha-1,representing the largest and the second largest C components in a rubber plantation ecosystem.Neglect of dry rubber C stock resulted in an underestimate of 7.8％ 14.2％ of the total C stock in the rubber plantations older than 9 years,which was much larger than the contribution of litter C stock (less than 2％). |
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| Keywords: | age sequence carbon sequestration dry rubber Hevea brasiliensis litter |
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