[1]黄志霖,田耀武,肖文发*,等.三峡库区防护林土壤有机碳的累积[J].南京林业大学学报(自然科学版),2013,37(02):015-20.[doi:10.3969/j.issn.1000-2006.2013.02.003]
 HUANG Zhilin,TIAN Yaowu,XIAO Wenfa*,et al.Soil organic carbon sequestration in protection forest in Three Gorges reservoir area[J].Journal of Nanjing Forestry University(Natural Science Edition),2013,37(02):015-20.[doi:10.3969/j.issn.1000-2006.2013.02.003]
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三峡库区防护林土壤有机碳的累积
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《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

卷:
37
期数:
2013年02期
页码:
015-20
栏目:
森林生态系统碳储量及碳密度研究专栏
出版日期:
2013-03-31

文章信息/Info

Title:
Soil organic carbon sequestration in protection forest in Three Gorges reservoir area
作者:
黄志霖1田耀武12肖文发1*马德举3
1. 中国林业科学研究院森林生态环境与保护研究所,国家林业局森林生态环境重点实验室,北京 100091; 2. 河南科技大学林学院,河南 洛阳 471003;
3. 秭归县林业局,湖北 宜昌 443600
Author(s):
HUANG Zhilin1TIAN Yaowu12XIAO Wenfa1*MA Deju3
1. State Forestry Administration Key Laboratory of Forest Ecology and Environment, Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China;
2. College of Forestry, Henan University of Science and Technology, Luoyang 471003, China;
3. Forestry Bureau of Zigui County, Yichang 443600, China
关键词:
三峡库区 退耕还林 土壤有机碳
Keywords:
Three Gorges reservoir area conversion of cropland to forest soil organic carbon(SOC)
分类号:
S718
DOI:
10.3969/j.issn.1000-2006.2013.02.003
文献标志码:
A
摘要:
退耕还林等土地利用变化影响着土壤有机碳(SOC)的累积。笔者设置LA(天然马尾松林地)、LB(桤木林地,2002年营造,之前为玉米地)、LC(玉米地)3类采样区,将土样按粒径分为3类,再分离为8种土壤团聚体组分,测定所有组分SOC和δ13C值。利用土壤团聚体组分和稳定性碳同位素(13C)技术探讨三峡库区农地造林后SOC的动态累积机制。结果表明:农耕使0~10 cm土层的SOC密度降低了57.2%,≥10~30 cm土层的降低了32.2%; 而退耕造林11 a后的桤木林0~10 cm土层的SOC密度增加了34.5%,≥10~30 cm土层的增加了42.9%; 其中源自桤木林的“新碳”在0~10 cm土层中占48%,≥10~30 cm土层占52%,土壤原先存储的“旧碳”仅损失了9.2%,造林增加SOC含量的原因可能是增加了“新碳”的固定能力,加强了对原存贮的“旧碳”的物理保护。
Abstract:
Land use change such as conversion of cropland to forest strongly affects the soil organic carbon(SOC)sequestration.The objective of this paper was to assess the dynamics mechanism of SOC sequestration in protection forest in Three Gorges reservoir area by means of organic matter fractionation and stable C isotopes(δ13C)technology. The soil of three land use patterns(LA. a permanent Pinus massoniana forestland, LB. a deciduous Sycamore maple forestland was planted on continuous maize field in 2002, LC. a continuous maize field)were sampled. Soil samples were separated into three aggregate size classes. And inter-vs.intra-aggregate particulate organic matter were isolated into eight soil aggregate fractionations by density method. All fractions were analyzed for their SOC content and δ13C. Results showed that long-term agricultural used land significantly decreased SOC content by 57.2%and 32.2% in the top 10 cm and in the ≥10-30 cm depth layer, respectively. But after 11 years afforestation, the total amount of soil C increased by 34.5% and 42.9% in the 0-10 cm and in the ≥10-30 cm depth layer, respectively. Forest-derived carbon(new C)contributed 48% and 52% to the total SOC storage in the afforested systems in the 0-10 cm and ≥10-30 cm depths, respectively. The stored SOC before 2002(old C)only lost by 9.2%in LB. Afforestation could significantly increase new SOC fixed and improve the old SOC physically protected.

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备注/Memo

备注/Memo:
收稿日期:2012-08-20 修回日期:2012-12-27
基金项目:国家林业公益性行业科研专项项目(201104008)
第一作者:黄志霖,博士。*通信作者:肖文发,研究员。E-mail: xiaowenfa@caf.ac.cn。
引文格式:黄志霖,田耀武,肖文发,等. 三峡库区防护林土壤有机碳的累积[J]. 南京林业大学学报:自然科学版,2013,37(2):15-20.
更新日期/Last Update: 2013-03-31