文献类型：期刊文献

英文题名：Mycorrhizal nitrogen uptake of wheat is increased by earthworm activity only under no-till and straw removal conditions

作者：Yang, Haishui[1,2] Zhou, Jiajia[1] Weih, Martin[3] Li, Yifan[1] Zhai, Silong[1] Zhang, Qian[4] Chen, Weiping[1] Liu, Jian[5] Liu, Ling[6] Hu, Shuijin[7,8]

第一作者：Yang, Haishui

通信作者：Yang, HS[1];Hu, SJ[2]

机构：[1]Nanjing Agr Univ, Coll Agr, Nanjing 210095, Peoples R China;[2]Nanjing Agr Univ, Jiangsu Collaborat Innovat Ctr Modern Crop Prod, Nanjing 210095, Peoples R China;[3]Swedish Univ Agr Sci, Dept Crop Prod Ecol, POB 7043, SE-75007 Uppsala, Sweden;[4]China Acad Forestry, Inst Forestry, 1 Dongriaofu,Xiangshan Rd, Beijing 100091, Peoples R China;[5]Inst Agr Sci Yanjiang Dist Jiangsu Prov, Rugao 226500, Peoples R China;[6]Henan Univ Sci & Technol, Coll Agr, Luoyang 471003, Peoples R China;[7]Nanjing Agr Univ, Coll Environm Sci & Technol, Nanjing 210095, Peoples R China;[8]North Carolina State Univ, Dept Plant Pathol, Raleigh, NC 27695 USA

年份：2020

卷号：155

外文期刊名：APPLIED SOIL ECOLOGY

收录：;Scopus(收录号：2-s2.0-85085278755);WOS:【SCI-EXPANDED(收录号:WOS:000561758300003)】；

基金：This study was supported by the National Natural Science Foundation of China (No. 31700483), the Fundamental Research Funds for the Central Universities (No. KYZ201808), NSFC-STINT Joint Project (No. 31811530008), and Qing-Lan Project of Jiangsu Universities. We are also grateful for Dr. Yupeng Wu helping for the identification of earthworm species.

语种：英文

外文关键词：Arbuscular mycorrhizal fungi; Crop residue incorporation; Wheat; Nitrogen uptake

摘要：A large part of crop nutrient uptake occurs through the interaction of roots with symbiotic arbuscular mycorrhizal fungi (AMF). However, it is still an open question how straw management and earthworm activity affect AMF community structure and their nitrogen-transferring function in wheat. A split-plot field experiment was conducted to address this question. Three straw management regimes including different tillage treatments (notill with no straw, NTNS; rotary tillage with straw return, RTSR and ditch-buried straw return, DBSR), and two earthworm treatments (no earthworm, -E; and earthworm addition, + E) were conducted. The AMF community structure in the wheat roots was characterized with high-throughput sequencing, and its function in terms of N acquisition was measured with 15 N isotope tracing through hyphal in-growth cores. Our results showed that both the DBSR and RTSR treatments significantly changed AMF community composition and enhanced the mycorrhiza-mediated plant N uptake when compared to NTNS. The effect of earthworm activity on AMF community composition and mycorrhiza-mediated N uptake strongly depended on the straw management regimes. While earthworm presence increased AMF dominance (+32.9%) and mycorrhizal N uptake (+ 2.05-fold) under straw removal, they decreased AMF dominance (- 30.4% and -41.9% respectively) and mycorrhizal N uptake (- 37.3% and - 34.3% respectively) under both DBSR and RTSR treatments in comparison with the absence of earthworms. It is concluded that straw addition shifts the AMF community structure and increases N uptake by the host plants; and that the effect of earthworms on AMF community structure and functioning depends on the straw management regime. The results suggest that straw management and its interaction with earthworms can affect mycorrhiza-mediated plant N uptake, possibly through altering some dominant AMF taxa.