文献类型：期刊文献

英文题名：Contrasting impacts of wheat rhizosphere and hyphosphere on methane and nitrous oxide emissions under straw incorporation

作者：Huang, Baowei[1] Wu, Yongcheng[1] Kan, Zheng-Rong[1] Berckx, Fede[2] Fransson, Petra[3] Zhang, Qian[4] Li, Feng-Min[1] Weih, Martin[2] Yang, Haishui[1]

第一作者：Huang, Baowei

通信作者：Yang, HS[1];Weih, M[2]

机构：[1]Nanjing Agr Univ, Coll Agr, Nanjing 210095, Peoples R China;[2]Swedish Univ Agr Sci, Dept Crop Prod Ecol, Uppsala, Sweden;[3]Swedish Univ Agr Sci, Dept Forest Mycol & Plant Pathol, Uppsala Bioctr, Uppsala, Sweden;[4]Chinese Acad Forestry, Res Inst Forestry, 1 Dongxiaofu,Xiangshan Rd, Beijing 100091, Peoples R China

年份：2026

卷号：255

外文期刊名：SOIL & TILLAGE RESEARCH

收录：;EI(收录号：20253218941303);Scopus(收录号：2-s2.0-105012524895);WOS:【SCI-EXPANDED(收录号:WOS:001547426100001)】；

基金：This study was supported financially by National Key Research & Development Program of China (No.2023YFD2302400) , NSFC-STINT Joint Project (No. 31811530008) and Research Cultivation Project, College of Agriculture in NAU. Additional funding was provided by the Sweden SLU Grogrund Grant to the project "HeRo - Healthy Roots: Development of tools for the selection of robust cultivars in Swedish plant breeding, with focus on the root system". Petra Fransson was supported by the Swedish Research Council FORMAS [grant number 2020-01100] .

语种：英文

外文关键词：rhizosphere processes; arbuscular mycorrhizal fungi; N 2 O emission; CH 4 emission; carbon budget; nitrogen transformation

摘要：Crop roots and associated microorganisms, specifically arbuscular mycorrhizal fungi (AMF), affect soil carbon (C) and nitrogen (N) transformations, which determine methane (CH4) and nitrous oxide (N2O) emissions. Little is known about the individual contributions of roots and AMF hyphae to soil C and N transformation as well as the subsequent CH4 and N2O emissions. Using an in vivo ingrowth core technique to isolate the effects of roots and AMF hyphae, coupled with static dark chambers to measure CH4 and N2O emissions under various straw management (no tillage and no straw, rotary tillage straw return, and ditch-buried straw return) conditions in a long-term field trial. The presence of AMF hyphae decreased N2O emission by 151 %, meaning there was a consumption, but increased CH4 emission by 59 %. Conversely, wheat root presence increased N2O emission by 199 %, but decreased CH4 emission by 183 %. Straw incorporation increased the magnitude of the rhizosphere and hyphosphere effects on N2O, but not CH4 emissions. The inverse relationship between rhizosphere and hyphosphere was caused mainly by changes in soil available phosphorus (P) and pH. In most cases, soil pH and available P increased by the presence of wheat roots but decreased by AMF hyphae. Random forest model and partial least squares path mode showed that changes in soil pH and available P shifted methane oxidation and nitrification activity, which further contributed to CH4 and N2O emissions. The findings suggest that the contrasting effects of crop rhizosphere and AMF hyphosphere on CH4 and N2O-related processes should be considered in predicting ecosystem C and N budgets under future climate change scenarios.