中国成熟天然林土壤有机碳垂直分异特征

doi:10.13287/j.1001-9332.202107.007

应用生态学报 ›› 2021, Vol. 32 ›› Issue (7): 2371-2377.doi: 10.13287/j.1001-9332.202107.007

中国成熟天然林土壤有机碳垂直分异特征

王深华^1,2, 江军^1*, 刘丰彩^1,2, 俞梦笑¹, 陈洋^1,2, 许萍萍^1,2, 常中兵^1,2, 王应平^1,3

¹中国科学院华南植物园, 广州 510650;
²中国科学院大学, 北京 100049;
³澳大利亚联邦科工组织, 澳大利亚维多利亚 3195

收稿日期:2021-01-18 修回日期:2021-03-24 出版日期:2021-07-15 发布日期:2022-01-15
通讯作者: *jiangjun@scib.ac.cn
作者简介:王深华,男,1991年生,硕士研究生。主要从事森林生态系统养分循环研究。E-mail:173145038@qq.com
基金资助:
国家自然科学基金项目(31901296)、广东省基础与应用基础研究基金项目(2021A1515010652)、中国博士后基金项目(2020M672863)和中国科学院战略性先导科技专项(XDA05050000)

Vertical differentiation of soil organic carbon in mature natural forests in China

WANG Shen-hua^1,2, JIANG Jun^1*, LIU Feng-cai^1,2, YU Meng-xiao¹, CHEN Yang^1,2, XU Ping-ping^1,2, CHANG Zhong-bing^1,2, WANG Ying-ping^1,3

¹South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China;
²University of Chinese Academy of Sciences, Beijing 100049, China;
³Commonwealth Scientific and Industrial Research Organisation, Victoria 3195, Australia

Received:2021-01-18 Revised:2021-03-24 Online:2021-07-15 Published:2022-01-15
Contact: *jiangjun@scib.ac.cn
Supported by:
National Natural Science Foundation of China (31901296),the Guangdong Basic and Applied Basic Research Foundation (2021A1515010652),the China Postdoctoral Science Foundation (2020M672863),and the Strategic Priority Research Program of Chinese Academy of Sciences (XDA05050000).

摘要/Abstract

摘要： 以分布在中国不同气候区的131个成熟天然林土壤为研究对象,测定不同土层(0～10、10～20、20～30、30～50和50～100 cm)土壤有机碳(SOC)密度,分析其与气象因子、土壤性质的关系,研究天然林SOC垂直分布特征及其影响机理。结果表明: 温带针叶林、温带落叶阔叶林、亚热带落叶阔叶林和亚热带常绿阔叶林0～30 cm土层SOC密度均随土壤深度增加而降低。在0～100 cm土层,SOC密度地带性分异明显,温带针叶林SOC密度显著高于温带落叶阔叶林,亚热带常绿阔叶林SOC密度显著高于亚热带落叶阔叶林。SOC密度与土壤黏粒、年降水量以及地上净初级生产力呈显著正相关,与土壤pH和年均温呈显著负相关。年降水量与年均温调节天然林SOC输入与输出,土壤pH与黏粒影响天然林SOC积累,对成熟的天然针叶林与常绿阔叶林进行有效保护,有利于增加我国森林土壤碳库。

关键词: 土壤有机碳, 成熟天然林, 随机森林模型, 结构方程模型

Abstract: We analyzed the effects of meteorological factors and soil properties on vertical variation of SOC, based on soil organic carbon (SOC) density in different soil layers (0-10, 10-20, 20-30, 30-50, and 50-100 cm) from 131 mature natural forests in different climate zones in China. The results showed that SOC density decreased with increasing soil depth (0-30 cm) in temperate coniferous, temperate deciduous broadleaved, subtropical deciduous broadleaved and subtropical evergreen broadleaved forests. There were significant regional variations of SOC density in 0-100 cm soil layer. SOC density of 0-100 cm soil layer in temperate coniferous forests was higher than temperate deciduous broadleaved forests, and was higher in subtropical evergreen broadleaved forests than subtropical deciduous broadleaved forests. SOC density was significantly positively correlated with soil clay content, mean annual precipitation, and aboveground net primary production, and significantly negatively correlated with soil pH and mean annual temperature. Mean annual precipitation and mean annual temperature influenced input and output of SOC, while soil pH and clay content affected SOC accumulation. Therefore, protecting mature natural coniferous and evergreen broadleaved forests would benefit forest carbon sequestration in China.

Key words: soil organic carbon, mature natural forest, random forest model, structural equation model

王深华, 江军, 刘丰彩, 俞梦笑, 陈洋, 许萍萍, 常中兵, 王应平. 中国成熟天然林土壤有机碳垂直分异特征[J]. 应用生态学报, 2021, 32(7): 2371-2377.

WANG Shen-hua, JIANG Jun, LIU Feng-cai, YU Meng-xiao, CHEN Yang, XU Ping-ping, CHANG Zhong-bing, WANG Ying-ping. Vertical differentiation of soil organic carbon in mature natural forests in China[J]. Chinese Journal of Applied Ecology, 2021, 32(7): 2371-2377.

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中国成熟天然林土壤有机碳垂直分异特征

Vertical differentiation of soil organic carbon in mature natural forests in China

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