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

doi:10.13287/j.1001-9332.201701.031

Abstract

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.

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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