Low soil carbon saturation deffcit limits the abundance of cbbL-carrying bacteria under long-term no-tillage maize cultivation in northern China  

作　　者：YIN Tao QIN Hong-ling YAN Chang-rong LIU Qi HE Wen-qing 

机构地区：[1]College of Resources and Environment,Qingdao Agricultural University,Qingdao 266109,P.R.China [2]Institute of Environment and Sustainable Development in Agriculture,Chinese Academy of Agricultural Sciences,Beijing 100081,P.R.China [3]Key Laboratory of Subtropical Agro-ecology,Institute of Subtropical Agriculture,Chinese Academy of Sciences,Changsha 410125,P.R.China [4]Key Laboratory of Prevention and Control of Residual Pollution in Agricultural Film,Ministry of Agriculture and Rural Affairs,Beijing 100081,P.R.China

出　　处：《Journal of Integrative Agriculture》2022年第8期2399-2412,共14页农业科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(31171512 and 42007312);the Key R&D Program of Hainan Province,China(ZDYF2020084);the Natural Science Foundation of Shandong Province,China(ZR2020QD117);the Research Fund for Introduced High-level Talents of Qingdao Agricultural University,China(11201103);the Central Public-interest Scientific Institution Basal Research Fund,China(BSRF202001)。

摘　　要：The responses of cbbL-carrying bacteria to different levels of soil carbon saturation deficits(SCSD)under tillage managements are largely unknown.We assessed the influence of SCSD on the abundance and diversity of cbbLcarrying bacteria under long-term no-tillage with residue retention(NT)and conventional tillage without residue retention(CT)cultivation systems in maize.We found SCSD was smaller under NT than under CT in the 0-15 cm soil layer.The abundance and the Shannon diversity of cbbL-carrying bacteria in the NT treatment were lower than in the CT treatment.Soil carbon saturation and cbbL gene abundance showed a significant positive correlation,but there was no correlation between soil carbon saturation and cbbL gene diversity.However,the long-term NT practice decreased cbbL-carrying bacteria diversity and altered the community structure of the cbbL-carrying bacteria.Our results indicated that low SCSD limited the abundance of cbbL-carrying bacteria,but there was no relationship between low SCSD and diversity of cbbLcarrying bacteria.We suggest that further studies of cbbL-carrying bacteria carbon sequestration rates and capacity should be based on the effect of management practices on cbbL-carrying bacteria abundance and diversity.Our study has important implications for the relationship between the biological and physicochemical mechanisms in CO_(2) fixation.

关 键 词：conservation tillage soil carbon saturation cbbL-carrying bacteria abundance and diversity 

分 类 号：S513[农业科学—作物学]