文献类型：期刊文献

英文题名：Combined application of biochar and N increased temperature sensitivity of soil respiration but still decreased the soil CO2 emissions in moso bamboo plantations

作者：Ge, Xiaogai[1,2,3] Cao, Yonghui[1,3] Zhou, Benzhi[1,3] Xiao, Wenfa[4] Tian, Xiaokun[1,3] Li, Mai-He[2]

第一作者：葛晓改;Ge, Xiaogai

通信作者：Zhou, BZ[1];Xiao, WF[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]State Forestry & Grassland Adm China, Qianjiangyuan Forest Ecosyst Res Stn, Hangzhou 311400, Zhejiang, Peoples R China;[4]Chinese Acad Forestry, Res Inst Forest Ecol Environm & Protect, State Forestry Adm Key Lab Forest Ecol & Environm, Beijing 100091, Peoples R China

年份：2020

卷号：730

外文期刊名：SCIENCE OF THE TOTAL ENVIRONMENT

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000537447300015)】；

基金：This study was supported by the Fundamental Research Funds for the Central Non-profit Research Institution (CAFYBB2018SY015, CAFYBB2017ZX002-2, CAFYBB2016SY006 and CAFYBB2018GB001), the National Natural Science Foundation of China (31600492 and 31670607), the China Scholarship Council (201703270004), National Key Research and Development Program of the Ministry of Science and Technology of China (2016YFD0600202) and Qianjiangyuan National Forest Ecological Research Station.

语种：英文

外文关键词：Biochar application; Negative priming effects; Nitrogen fertilization; Phyllostachys edulis; Q(10); Soil available nutrients; Soil carbon emission

摘要：Biochar addition to soil is increasing worldwide, the effect of combined application of biochar and nitrogen (N) fertilizer on soil respiration is still unknown. Understanding of the interactive effects of biochar and N fertilizer addition on temperature sensitivity of soil respiration and temporal dynamics of soil CO2 emissions in forest ecosystems remains limited. We conducted a full factorial experiment with biochar (B-0, B-1 and B-2 with 0, 5 and 20 t.ha(-1), respectively) and N fertilizer addition (N-0 and N-1 with 0 and 50 kg.ha(-1) NH4NO3, respectively) as factors, to study their effects on soil respiration rate, temperature sensitivity (Q(10)), soil available nutrients, and their relations in moso bamboo plantations in subtropical China from April 2014 to April 2016. We found that, irrespective of biochar addition rate, N fertilization increased Q(10) on the one hand, and irrespective of N fertilization rate, lower application rate of biochar resulted in a higher Q(10), on the other hand. In spite of increased Q(10), combined application of biochar and N decreased soil respiration rate in both growing season and non-growing season, as well as the annual cumulative soil CO2 emissions. Annual cumulative soil CO2 emissions were found to be significantly positively correlated with soil total nitrogen (STN) (p = 0.028) in 0-10 cm soil layer, and with soil ammonium (NH4+) (p = 0.000) and soil microbial biomass carbon (MBC) (p = 0.000) in both 0-10 cm and 10-20 cm soil layer. The present study suggests that the combined application of biochar and N fertilizer can be widely used in subtropical forest ecosystems where soil N is limited, because it increases soil fertility and, at the same time, decreases soil CO2 emissions. (C) 2020 Elsevier B.V. All rights reserved.