盐度对滨海湿地土壤碳库组分及稳定性的影响

doi:10.13249/j.cnki.sgs.2018.05.018

地理科学 ›› 2018, Vol. 38 ›› Issue (5): 800-807.doi: 10.13249/j.cnki.sgs.2018.05.018

盐度对滨海湿地土壤碳库组分及稳定性的影响

王纯¹(), 刘兴土¹(), 仝川^2,³

1.中国科学院东北地理与农业生态研究所湿地生态与环境重点实验室,吉林长春 130102
2.福建师范大学地理科学学院,福建福州 350007
3.福建师范大学亚热带湿地研究中心,福建福州 350007

收稿日期:2017-04-10 修回日期:2017-07-20 出版日期:2018-05-10 发布日期:2018-05-10
作者简介:
作者简介：王纯（1982-）,女,湖南益阳人,博士,主要从事湿地元素生物地球化学循环研究。E-mail:wangchun821314@163.com
基金资助:
国家重点基础研究发展计划课题（2013CB430401）、中国博士后科学基金（2017M611337）资助

Effects of Salinity on Characteristics and Stability of Soil Carbon Pool in Coastal Wetland

Chun Wang¹(), Xingtu Liu¹(), Chuan Tong^2,³

1.Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, Jilin,China
2. College of Geographical Sciences, Fujian Normal University, Fuzhou 350007, Fujian,China
3. Key Labratory of Humid Subtropical Eco-geographical Process, Ministry of Education, Fujian Normal University, Fuzhou 350007, Fujian, China

Received:2017-04-10 Revised:2017-07-20 Online:2018-05-10 Published:2018-05-10
Supported by:
National Basic Research Program of China (2013CB430401), China Postdoctoral Science Foundation(2017M611337)

摘要/Abstract

摘要：

从土壤有机碳含量和活性组分出发,分析了湿地土壤碳库组分对盐度变化的响应特征。同时分析了土壤有机碳3种稳定机制,评述了土壤碳稳定性与盐分中主要离子的博弈。并在基于研究滨海湿地碳固定与稳定的基础上,提出了土壤碳稳定与营养元素循环的相互作用机制研究、土壤碳稳定与微生物及酶学机制的关系研究、借助稳定同位素技术多要素多过程耦合研究等科学问题展望。以期为了解未来中国海平面上升背景下湿地碳截获潜力的可能演变趋势及其应对策略,为发展和完善中国湿地土壤碳循环理论奠定科学基础。

关键词: 盐度, 土壤碳库, 土壤活性组分, 滨海湿地

Abstract:

Soil carbon sequestration and stability in coastal wetland are of great significance in maintaining primary productivity of wetland and mitigating global warming. Current studies about soil carbon stability mainly focused on the inland ecosystems while lack on the coastal wetland. Based on the content and active fractions of soil organic carbon, the responses of soil carbon fractions to varied salinity were analyzed. Meanwhile, three stabilization mechanisms of soil organic carbon were reviewed, and the game of soil carbon stability and main ions in salt was in depth explored. Furthermore, based on the study of carbon sequestration and stabilization of coastal wetland, three scientific issues have been suggested, including the interaction mechanism of soil carbon stabilization and nutrient cycling, and the relationship between soil carbon stability and microbial and enzymatic mechanisms, as well as the coupling research of multi-factor and multi-process, in order to understand the possible evolution trend of carbon sequestration, and for strategies making aiming at sustainable carbon sequestration in coastal wetland under the rising sea level, as well as to provide sound knowledge base for the development and improvement of carbon cycling theory in wetland soil of China.

Key words: salinity, soil carbon pool, soil active fractions, coastal wetland

中图分类号:

王纯, 刘兴土, 仝川. 盐度对滨海湿地土壤碳库组分及稳定性的影响[J]. 地理科学, 2018, 38(5): 800-807.

Chun Wang, Xingtu Liu, Chuan Tong. Effects of Salinity on Characteristics and Stability of Soil Carbon Pool in Coastal Wetland[J]. SCIENTIA GEOGRAPHICA SINICA, 2018, 38(5): 800-807.

图/表 2

图 1

表1

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土地类型	研究对象	SOC稳定机制			参考文献
土地类型	研究对象	分子生物学稳定	团聚体物理稳定	化学结合稳定	参考文献
农田（美国）	干湿交替		干湿交替初期大团聚体周转快,SOC稳定性差,后期固碳增加		[46]
水稻田（中国）	疏水性有机质	木质素和脂类等疏水性SOC被选择性保护		氧化铁含量高和土壤pH较低的水稻土保护疏水性SOC	[47]
沙土（澳大利亚）	作物残茬vs 土壤pH	分子结构稳定顺序：烷基碳>芳基碳>氧烷基碳			[48]
无草休闲地（法国）	钙盐土壤结构vs钾盐土壤结构		钙盐样地大团聚稳定性高,短时间以团聚体固碳为主	长时间尺度钙盐样地主要以黏粒和粉砂固碳为主	[49]
亚北极草地（冰岛）	土壤增温	增温时分子结构稳定不是固碳的主要机理	增温降低团聚体稳定性,导致团聚体保护的SOC大量亏损		[50]
黄土丘陵区（中国）	退耕还林		53~250 μm粒级土壤微团聚体物理保护SOC组分的比例较小	退耕还林后主要通过粉砂和黏粒内矿物表面吸附固定SOC	[51]
森林土壤（西班牙）	生物炭			生物炭、层状硅酸盐和铁铝氧化物等在黏粒尺度固碳	[52]
高山和亚高山土壤（比利牛斯山）	土壤矿物			弱晶质氧化铁和水铁矿固定SOC较硅铝矿物更重要	[53]
森林土壤（中国）	不同树种	阔叶林较马尾松林低烷基碳,高氧烷基碳,稳定性差			[54]
黏土和沙土（捷克）	蚯蚓	蚯蚓处理下SOC的芳香族成分和酚类含量无显著变化	蚯蚓吸收有机残体进入土壤产生新的团聚体而保护SOC		[55]
河口湿地（中国）	时间尺度和土地利用变化		旱地农田土壤微团聚体闭蓄SOC与输入的植物残茬有关	未开垦的湿地SOC主要被水合氧化铁和铝稳定	[56]

盐度对滨海湿地土壤碳库组分及稳定性的影响

Effects of Salinity on Characteristics and Stability of Soil Carbon Pool in Coastal Wetland

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