Litter priming and trenching greatly affect soil respiration in a mature subtropical evergreen broadleaf forest in Southwestern China (330,00 руб.)

Сибирский экологический журнал, 4 (2015) 589–597 УДК 630*181.321/510 DOI 10.15372/SEJ20150410 Litter priming and trenching greatly affect soil respiration in a mature subtropical evergreen broadleaf forest in Southwestern China J. J. WANG1,2, L. M. LAI1,2, X. C. ZHAO1,2, L. H. JIANG1,2, Y. J. WANG1,2, J. H. ZHOU1,2, F. WANG3, C. ZHANG3, Y. R. ZHENG1 1 Beijing Botanical garden Key Laboratory of Resource Plants West Chinа Subalpine Botanical Garden Institute of Botany CAS 100093, Chinа, Beijing 2 University of Chinese Academy of Sciences 100039, Beijing, Chinа 3West Chinа Subalpine Botanical garden Institute of Botany CAS 611843, Chinа, Dujiangyanyan E-mail: zhengyr@ibcas.ac.cn Статья поступила 22.11.2014 Принята к печати 30.01.2015 ABSTRACT Global warming will stimulate primary production, which is likely to drive shifts in litter production and lead to an increase in carbon (C) inputs to soil. <...> In a typical subtropical evergreen broadleaved forest in Southwestern China we conducted a controlled experiment that included addition and removal of litter, and trenching. <...> Soil respiration was significantly related to temperature in all treatments, but was independent of soil moisture, except in control plots. <...> Q10 values in control, trenching, litter addition, and litter removal treatments were 3.46, 6.36, 2.72, and 4.85, respectively. <...> Litter addition reduced Q10, but litter removal and trenching increased it. <...> Average heterotrophic soil respiration produced C in the amount equivalent to 48 % of the efflux from the soil. <...> Our results suggest that increases in litter production in response to human disturbances and global warming could have rapid and important consequences on soil respiration in subtropical evergreen broadleaved forests. <...> Key words: soil respiration, heterotrophic respiration, litter, litter addition, litter removal. © Wang J. J., Lai L. M., Zhao X. C., Jiang L. Н., Wang Y. J., Zhou J. Н., Wang F., Zhang C., Zheng Y. R., 2015 589 Soil respiration (RS) is acknowledged to be the second largest <...>