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江西省人工造林碳蓄积的时空过程
引用本文:黄麟,邵全琴,刘纪远.江西省人工造林碳蓄积的时空过程[J].生态学报,2015,35(7):2105-2118.
作者姓名:黄麟  邵全琴  刘纪远
作者单位:中国科学院地理科学与资源研究所, 北京 100101,中国科学院地理科学与资源研究所, 北京 100101,中国科学院地理科学与资源研究所, 北京 100101
基金项目:国家自然科学基金(41001366, 41371019)
摘    要:人工造林被认为是吸收CO2、减缓气候变暖最有效且最具生态效应的碳增汇方法之一。以江西省作为南方红壤丘陵区人工造林的典型研究区,综合应用树轮生态分析、模型模拟、尺度融合、文献整合分析、遥感反演和GIS空间分析等方法,基于树木年轮信息、森林样方资料和人工林分布数据等,驱动树木材积生长量模型和区域碳通量模型,从样地到区域模拟分析了人工林生产力和碳蓄积的时空变化规律。结果表明,1)1980年至2007年,江西省人工林净初级生产力(NPP)呈现先迅速下降而后缓慢增加的趋势,至今仍未恢复到之前的人工林质量水平,2)碳蓄积年变化在前8a处于平稳状态,而后变化速率增快,从2.19Tg C/a迅速增至8.02 Tg C/a,此后增速减缓;3)人工林NPP与降水量、温度的关系不明显,海拔对NPP值的影响较大而对NPP变化趋势的影响较小,NPP值随着坡度增加而增大;4)造林方式比较,人工造林碳增汇潜力最大,而封山育林在碳蓄积效应方面不具优势。

关 键 词:江西省  人工造林  碳蓄积  TGTRing模型  InTEC模型
收稿时间:2013/6/5 0:00:00
修稿时间:2015/3/14 0:00:00

The spatial and temporal patterns of carbon sequestration by forestation in Jiangxi Province
HUANG Lin,SHAO Quanqin and LIU Jiyuan.The spatial and temporal patterns of carbon sequestration by forestation in Jiangxi Province[J].Acta Ecologica Sinica,2015,35(7):2105-2118.
Authors:HUANG Lin  SHAO Quanqin and LIU Jiyuan
Institution:Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China,Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China and Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
Abstract:Forestation was considered as one of the most effective and ecological approaches for increasing carbon sink, and then to promoting atmospheric CO2 absorption and mitigating climate change. It was also one of the key measures in forestry engineering and ecological restoration. In this paper, Jiangxi Province was selected as the typical study area of red soil hilly region - one of the primary plantation areas in Southern China. The Mountain-River-Lake program since 1980s in Jiangxi Province is a typical successful program of ecological restoration in red soil hilly region, which increased the forest coverage of Jiangxi by 28.55% through implementation of greening barren hill, reforestation, and the Grain for Green Program. This study applied TGTRing and InTEC model simulation, scale transformation from plot to transect and region, field investigation and sampling, dendrochronology method based on tree-ring information, forest inventory data, and carbon budget model, to discuss the effects of forest age and human activities on net primary production (NPP) and carbon sequestration, and then to analysis the annual variation of plantation NPP and carbon sequestration. We try to depict the relations among forest age and NPP through the growth curves of main planting tree species, and then the carbon sequestration of plantation were simulated. The purpose of this paper is to evaluate the carbon effects of forestation, and the carbon regulation service of ecological restoration. The results showed that: 1) The NPP simulations for main planting tree species by tree-ring suggested that the NPP value of Masson pine (P. massoniana), Slash pine (P. elliottii) and Chinese fir (Cunninghamia lanceolata) rises rapidly with the increased forest age and reaches to the peak value in 10a (1058 g m-2 a-1), 10a (901.09 g m-2 a-1) and 11a (1305.67 g m-2 a-1) respectively, and then decreased to stable level in 42a (87.2 g m-2 a-1), 42a (156.0 g m-2 a-1) and 40a (33.0 g m-2 a-1); 2)The NPP trend of plantation from 1980 to 2007 in Jiangxi Province were decreased rapidly before and then increased slowly, which responded the lower quality of plantation. Although the forest coverage increased from 26.98% to 60.05% mainly contributed by the enlarged plantation area, the forest volume per hectare were relatively lower especially for the plantations, because the forest is dominated by secondary natural forest, and middle- aged even young-aged plantation; 3) The variation of carbon sequestration presented as steady trend in the first 8 years before 1988 (2.19-2.37 gC m-2 a-1) since the beginning of Mountain-River-Lake Program. It then increased rapidly reach to 8.02 gC m-2 a-1 at the thirteen years, and followed by relatively lower increasing rate; 4) The influences of precipitation and temperature on plantation NPP were showed unobvious. However, the elevation greatly impacts the absolute value of NPP, but not the variation trend. In addition, the NPP increased with higher slope; 5) Validated by tree-ring estimated carbon sequestration value and station observed net ecosystem production (NEP) value, we found that modeled NEP shows good consistency than annual net increasing carbon sequestration; 6) The potential carbon sink thorough tree planting is higher than other planting patterns. Furthermore, closing for reforestation showed unobvious advantage in carbon sequestration service.
Keywords:Jiangxi Province  plantation  carbon sequestration  TGTRing model  InTEC model
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