Appropriate Irrigation and Fertilization Regime Restrain Indigenous Soil Key Ammonia-Oxidizing Archaeal and Bacterial Consortia to Mitigate Greenhouse Gas Emissions

Liang Xiao, Libin Bao, Lantian Ren, Yiqin Xie, Hong Wang, Xiang Wang, Jianfei Wang, Cece Qiao and Xin Xiao
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Liang Xiao: Jiangsu Provincial Key Lab of Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center of Solid Organic Wastes, Educational Ministry Engineering Center of Resource-Saving Fertilizers, Nanjing Agricultural University, Nanjing 210095, China
Libin Bao: Department of Environmental Science and Engineering, Anhui Science and Technology University, Donghua Road 9#, Chuzhou 233100, China
Lantian Ren: Department of Environmental Science and Engineering, Anhui Science and Technology University, Donghua Road 9#, Chuzhou 233100, China
Yiqin Xie: Department of Environmental Science and Engineering, Anhui Science and Technology University, Donghua Road 9#, Chuzhou 233100, China
Hong Wang: Department of Environmental Science and Engineering, Anhui Science and Technology University, Donghua Road 9#, Chuzhou 233100, China
Xiang Wang: Department of Environmental Science and Engineering, Anhui Science and Technology University, Donghua Road 9#, Chuzhou 233100, China
Jianfei Wang: Department of Environmental Science and Engineering, Anhui Science and Technology University, Donghua Road 9#, Chuzhou 233100, China
Cece Qiao: Jiangsu Provincial Key Lab of Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center of Solid Organic Wastes, Educational Ministry Engineering Center of Resource-Saving Fertilizers, Nanjing Agricultural University, Nanjing 210095, China
Xin Xiao: Department of Environmental Science and Engineering, Anhui Science and Technology University, Donghua Road 9#, Chuzhou 233100, China

Sustainability, 2022, vol. 14, issue 10, 1-11

Abstract: Harnessing an ammonia-oxidizing microbiome has become an increasingly attractive form of management for mitigating greenhouse gas emissions in rice paddies; however, the relationship between greenhouse gas emissions and ammonia-oxidizing microbiomes, using a nitrogen application and irrigation regime, has not been well investigated. To decipher which of (and how) the specific mmonia-oxidizing bacterial species drive the greenhouse gas CH 4 and N 2 O emissions, a field experiment with varying nitrogen application and irrigation regimes was initiated to investigate the succession of key bacterial consortia associated with GHG emissions. The results showed that water-saving irrigation (AWD) significantly increased NO 3 -N and NH 4 + -N concentrations, compared with conventional irrigation (FDF), whereas (total nitrogen) TN was little higher in FDF (1.38 g kg −1 ) compared with the AWD (1.36 g kg −1 ). During the rice-growing season, CH 4 emissions ascended speedily, and emissions peaked at maximum values of 3.32 and 4.41 ug mg −2 h −1 on day 5 in FDF and AWD irrigation regimes, respectively, and then they rapidly decreased during the midseason period, maintaining a relatively low emission rate until the rice was harvested. The patterns of N 2 O emission fluxes had the same tendencies with N fertilization. Putative key taxa, such as Flavobacterium , Massilia , Arenimonas , Novosphingobium , Pseudomonas , exhibited significant positive relationships with higher GHG emissions, suggesting that they make particularly obvious contributions to N 2 O emissions. These putative taxa should be considered when designing a high nitrogen application and irrigation strategy. As such, the nitrogen application of N180, and the irrigation regimes of water-saving irrigation, are recommended methods for N conservation and the mitigation of greenhouse gas emissions in rice paddies.

Keywords: irrigation and fertilization regimes; ammonia-oxidizing microbiome; greenhouse gas emissions (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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