Relative contribution of roots and symbiotic fungi to wheat nitrogen uptake and N2O emissions under straw burial
文献类型: 外文期刊
第一作者: Kan, Zheng-Rong
作者: Kan, Zheng-Rong;Li, Yanling;Yang, Ruoyan;Yang, Xinyu;Wei, Qihang;Li, Feng-Min;Yang, Haishui;Virk, Ahmad Latif;Qi, Jianying;Zhang, Zichang;Yang, Haishui;Yang, Haishui
作者机构: Nanjing Agr Univ, Coll Agr, Nanjing 210095, Peoples R China;Zhejiang A&F Univ, State Key Lab Subtrop Silviculture, Hangzhou 311300, Peoples R China;South China Agr Univ, Coll Agr, Guangzhou 510642, Peoples R China;Inst Plant Protect, Jiangsu Acad Agr Sci, Nanjing, Peoples R China;Nanjing Agr Univ, Jiangsu Key Lab Informat Agr, Nanjing 210095, Peoples R China;Agr Univ, Jiangsu Collaborat Innovat Ctr Modern Crop Prod, Nanjing 210095, Peoples R China
关键词: Ditch-buried straw return; Crop yield; N 2 O; N uptake; Arbuscular mycorrhizal fungi; Root
期刊名称:RHIZOSPHERE ( 2022影响因子:3.7; 五年影响因子:3.8 )
年卷期: 2023 年 28 卷
收录情况: SCI
摘要: Ditch-buried straw return (DB-SR), as a novel soil tillage practice, has shown the yield improvement in recent studies in comparison to rotary tillage with straw return (RT-SR). However, the underlying mechanisms are not well known. One field and two greenhouse experiments were conducted to compare the effects of DB-SR on grain yield and nitrogen (N) cycling with other straw managements [RT-SR and straw removal (CK)], and to identify the relative contribution of roots and arbuscular mycorrhizal fungi (AMF) to N cycling in a wheat based cropping system. The field experiment and literature reviews showed that DB-SR can significantly improve annual yields by 19.1% and 15.5% compared with CK and RT-SR, respectively under different cropping systems. The pot experiments supported the findings of field experiments that DB-SR can improve wheat N uptake and decrease N2O emissions driven by trade-offs between AMF and roots depending on soil textures. Roots showed larger impacts in promoting N uptake for wheat and N loss from N2O emissions compared with AMF in clay soils under DB-SR. However, a contrasting pattern was detected in sandy soils where AMF improved N uptake and reduced N2O emissions. Our results highlight that trade-offs between roots and AMF under DB-SR can affect wheat N uptake, and DB-SR could be a practical measure to increase grain yield by improving N uptake and mitigate N2O emission.
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