文献类型：期刊文献

英文题名：Accelerated Nitrification Rate and Altered Community Structure of Ammonia-Oxidizing Microorganisms in the Saline-Alkali Tolerant Rice Rhizosphere of Coastal Solonchaks

作者：Zhen, Zhen[1,2]; Li, Gaoyang[1]; Chen, Yijie[1]; Wei, Ting[1]; Li, Huijun[1]; Huang, Fengcheng[1]; Huang, Yongxiang[1,2]; Ren, Lei[1]; Liang, Yanqiu[3]; Zhang, Dayi[4]; Lin, Zhong[3,5]; Li, Zhe[6]

机构：[1] College of Coastal Agricultural Sciences, Guangdong Ocean University, Zhanjiang, 524088, China; [2] South China Branch of National Saline-Alkali Tolerant Rice Technology Innovation Center, Zhanjiang, 524088, China; [3] Faculty of Chemistry and Environmental Science, Guangdong Ocean University, Zhanjiang, 524088, China; [4] College of New Energy and Environment, Jilin University, Changchun, 130021, China; [5] Shenzhen Research Institute, Guangdong Ocean University, Shenzhen, 518108, China; [6] Biology Institute, Qilu University of Technology, Shandong Academy of Sciences, Jinan, 250014, China

年份：2022

外文期刊名：SSRN

收录：EI(收录号：20220393235)

语种：英文

外文关键词：Ammonia - Bacteria - Food supply - Nitrification - Organic carbon - Soils

外文摘要：Plantation of saline-alkali tolerant rice in coastal areas is proposed as a strategy to improve rice yield and ensure global food security. The soil nitrification process driven by ammonia-oxidizing bacteria (AOB) and ammonia-oxidizing archaea (AOA) is an integral part of the soil nitrogen cycle and is correlated with coastal solonchak quality. However, little is known about the effects of saline-alkali tolerant rice cultivation on the soil nitrification process in coastal solonchaks. In this study, we investigated the community structures of AOA/AOB and nitrification rate (NR) in the rice rhizosphere along salinity gradients. Saline-alkali-tolerant rice cultivation significantly decreased the soil pH, organic carbon content, and salinity in the rhizosphere. The abundance of amoA genes from AOA and AOB increased in the rhizosphere from (3.09-11.5)×10 6 and (7.76-52.0)×10 5 copies g -1 in soils to (16.2-50.9)×10 6 and (69.2-423)×10 5 copies g -1 in the rhizosphere, respectively. Compared with bulk soils, the NR of AOA in the rhizosphere increased by 41.67% in the high-salt treatment (6 g kg -1 ), and that of AOB increased from 0.09-2.00 mg N kg -1 soil d -1 to 0.70-2.56 mg N kg -1 soil d -1 . Salinity elevation significantly reduced the relative abundance of Nitrosocaldus and Nitrosospira , and increased that of Nitrosocosmicus and Nitrosomonas . The Nitrosospira and amoA genes from AOA/AOB were negatively correlated with soil pH, organic carbon and salinity. Our findings offer new clues on the accelerated nitrification process in the saline-alkali tolerant rice rhizosphere in coastal solonchaks and reveal its roles in shaping AOA/AOB communities, providing suggestions for saline-alkali tolerant rice plantations in coastal solonchaks. ? 2022, The Authors. All rights reserved.