文献类型：期刊文献

英文题名：Biochar addition increases subsurface soil microbial biomass but has limited effects on soil CO2 emissions in subtropical moso bamboo plantations

作者：Ge, Xiaogai[1,2,3] Cao, Yonghui[1,3] Zhou, Benzhi[1,3] Wang, Xiaoming[1,3] Yang, Zhenya[1,3] Li, Mai-He[2]

第一作者：Ge, Xiaogai;葛晓改

通信作者：Zhou, B[1];Li, MH[2]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou 311400, Zhejiang, Peoples R China;[2]Swiss Fed Inst Forest Snow & Landscape Res WSL, Zuercherstr 111, CH-8903 Birmensdorf, Switzerland;[3]Natl Forestry & Grassland Adm China, Qianjiangyuan Forest Ecosyst Res Stn, Hangzhou 311400, Zhejiang, Peoples R China

年份：2019

卷号：142

起止页码：155-165

外文期刊名：APPLIED SOIL ECOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000470824300018)】；

基金：This study was supported by the National Natural Science Foundation of China (grant nos. 31600492 and 31670607), the Fundamental Research Funds for the Central Non-profit Research Institution (grant nos. CAFYBB2016SY006, CAFYBB2017ZX002-2, CAFRISF2013002 and CAFRISF2014005), the China Scholarship Council (grant no. 201703270004), the Qianjiangyuan National Forest Ecological Research Station and the CFERN & BEIJING TECHNO SOLUTIONS Award Funds for excellent academic achievements. We greatly thank Melissa Dawes for providing linguistic suggestions. We also thank two anonymous reviewers for helpful suggestions on the manuscript.

语种：英文

外文关键词：Biochar; Microbial composition; Phospholipid-derived fatty acids; Soil CO2 emissions; Temperature sensitivity

摘要：Biochar addition affects soil conditions and soil microorganisms, and it may reduce soil CO2 emissions. However, knowledge on how biochar addition induces the changes in soil microbial communities with soil depth and time and affects soil respiration is limited in forest ecosystems. We investigated the effects of biochar addition on soil respiration rate and its sensitivity to soil temperature and microbial community composition in moso bamboo (Phyllostachys eduis) plantations in subtropical China for two years. We set up four treatments of biochar addition onto the soil surface of the plantations with the level of 0 (control, CK), 5 (low biochar, LB), 10 (medium biochar, MB), or 20 t biochar ha(-1) (high biochar, HB) in April 2014. Biochar addition significantly improved soil moisture at 5 cm soil depth but did not affect soil temperature. Microbial biomass increased significantly with biochar addition at 10-20 cm soil depth but showed no response in the 0-10 cm depth soil layer. Compared to CK, biochar addition significantly affected the mean soil respiration rate during the two-year experiment, but the difference between CK and biochar treatments decreased both with time following biochar addition and with increasing biochar dosage. Annual cumulative soil respiration was significantly and positively correlated with the biomass of total PLFAs, gram-negative bacteria, bacteria, and arbuscular mycorrhizal fungi (P < 0.05) at 0-10 cm soil depth but not at 10-20 cm. Overall, only LB significant decreased the total CO2 emissions. Our results suggest that lower dosage additions of biochar have a positive effect in reducing total CO2 emissions and promote soil organic carbon sequestration in bamboo forests in subtropical China.