干扰强度对亚热带米槠人促更新林土壤呼吸及其组分的影响

doi:10.13287/j.1001-9332.201701.031

应用生态学报 ›› 2017, Vol. 28 ›› Issue (1): 19-27.doi: 10.13287/j.1001-9332.201701.031

干扰强度对亚热带米槠人促更新林土壤呼吸及其组分的影响

陈忠^1,2,3, 林成芳^1,2,3, 张星星^1,2,3, 林伟盛^1,2,3*, 刘小飞^1,2,3, 李一清^1,2,3,4, 杨玉盛^1,2,3

¹福建师范大学地理科学学院, 福州 350007
²湿润亚热带山地生态国家重点实验室培育基地, 福州 350007
³福建三明森林生态系统与全球变化研究站, 福建三明 365000
⁴College of Agriculture, Forestry and Natural Resource Management, University of Hawaii, Hilo, HI 96720, USA

收稿日期:2016-06-12 修回日期:2016-11-02 发布日期:2017-01-18
通讯作者: *E-mail:weilsnlin@fjnu.edu.cn
作者简介:陈忠,男,1991年生,硕士研究生.主要从事森林生态系统碳循环研究.E-mail:chenzhonggz@163.com
基金资助:
本文由国家自然科学基金重点项目(31130013)和国家自然科学基金面上项目(31270584)资助

Effects of interference intensity on soil respiration and its components in Castanopsis carlesii forest with artificially assisted regeneration in subtropical China

CHEN Zhong^1,2,3, LIN Cheng-fang^1,2,3, ZHANG Xing-xing^1,2,3, LIN Wei-sheng^1,2,3*, LIU Xiao-fei^1,2,3, LI Yi-qing^1,2,3,4, YANG Yu-sheng^1,2,3

¹School of Geographical Science, Fujian Normal University, Fuzhou 350007, China
²Cultivation Base, State Key Laboratory of Humid Subtropical Mountain Ecology, Fuzhou 350007, China
³Sanming Research Station of Forest Ecosystem and Global Change, Sanming 365000, Fujian, China
⁴College of Agriculture, Forestry and Natural Resource Management, University of Hawaii, Hilo, HI 96720, USA

Received:2016-06-12 Revised:2016-11-02 Published:2017-01-18
Contact: *E-mail:weilsnlin@fjnu.edu.cn
Supported by:
This work was supported by the Key Project of National Natural Science Foundation of China (31130013) and the General Project of National Natural Science Foundation of China (31270584)

摘要/Abstract

摘要： 研究轻度干扰和重度干扰对亚热带米槠人促更新林土壤总呼吸、异养呼吸的影响.结果表明:与轻度干扰米槠林相比,重度干扰林的土壤呼吸及其各组分均下降,其中,自养呼吸(R_A,1.75 t C·hm^-2·a^-1)下降了40%.与轻度干扰林相比,重度干扰林土壤有机碳储量、细根生物量和凋落物量均显著降低.土壤温度可以分别解释轻度干扰林土壤呼吸(R_S)、异养呼吸(R_H)、自养呼吸(R_A)的84.7%、68.3%、5.1%,可以解释重度干扰林的84.4%、54.6%、21.7%.轻度干扰林和重度干扰林R_S、R_H、R_A的Q₁₀值分别为1.75、1.93、1.27和2.46、2.34、1.65.随着干扰强度的增加,森林生态系统碳储量降低,土壤呼吸下降,且土壤呼吸及其各组分对外界环境变化的响应更明显,生态系统表现出脆弱性,重度干扰下森林生态系统在短时间内难以恢复.

Abstract: The effects of interference intensity on soil respiration (R_S) and heterotrophic respiration (R_H) were studied in two Castanopsis carlesii forests with artificially assisted regeneration. The results showed that C. carlesii forest decreased the R_S and its components with the increasing interfe-rence intensity, particularly decreased its autotrophic respiration (R_A, 1.75 t C·hm^-2·a^-1) by 40% under high interference than under low interference. Compared with C. carlesii forest under low interference, soil organic carbon, fine root biomass, and annual litterfall biomass of C. carlesii forest were significantly reduced under high interference. Soil temperature could explain the seasonal variations of R_S, R_H, and R_A with 84.7%, 68.3% and 5.1% for the C. carlesii forest under low interference, and with 84.4%, 54.6% and 21.7% for the C. carlesii forest under high interference, respectively. The Q₁₀ values of R_S, R_H and R_A in the C. carlesii forest were 1.75, 1.93, 1.27 under low interference, and 2.46, 2.34, 1.65 under high interference, respectively. Carbon storage and soil respiration of forest ecosystem would decrease with the increasing interference intensity, the responses of soil respiration and its components to environmental change were obvious, and forest ecosystem showed vulnerability. It indicated the difficulty of restoring forest ecosystem with high interference during a short term.

陈忠, 林成芳, 张星星, 林伟盛, 刘小飞, 李一清, 杨玉盛. 干扰强度对亚热带米槠人促更新林土壤呼吸及其组分的影响[J]. 应用生态学报, 2017, 28(1): 19-27.

CHEN Zhong, LIN Cheng-fang, ZHANG Xing-xing, LIN Wei-sheng, LIU Xiao-fei, LI Yi-qing, YANG Yu-sheng. Effects of interference intensity on soil respiration and its components in Castanopsis carlesii forest with artificially assisted regeneration in subtropical China[J]. Chinese Journal of Applied Ecology, 2017, 28(1): 19-27.

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干扰强度对亚热带米槠人促更新林土壤呼吸及其组分的影响

Effects of interference intensity on soil respiration and its components in Castanopsis carlesii forest with artificially assisted regeneration in subtropical China

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