Biological nitrification inhibitor co-application with urease inhibitor or biochar yield different synergistic interaction effects on NH3 volatilization, N leaching, and N use efficiency in a calcareous soil under rice cropping. (15th January 2022)

• Record Type: Journal Article
• Authors: Lan, Ting; Huang, Yuxiao; Song, Xi; Deng, Ouping; Zhou, Wei; Luo, Ling; Tang, Xiaoyan; Zeng, Jian; Chen, Guangdeng; Gao, Xuesong
• Is Part Of: Environmental pollution. Volume 293(2022)
• Publication Date: 2022-01-15
• Subjects: Ammonia-oxidizing bacteria -- Ammonia-oxidizing archaea -- N2O emission -- Nitrogen balance -- Nitrogen fate -- Nitrification; Pollution -- Periodicals; Pollution -- Environmental aspects -- Periodicals; Environmental Pollution -- Periodicals; Pollution -- Périodiques; Pollution -- Aspect de l'environnement -- Périodiques; Pollution -- Effets physiologiques -- Périodiques; Pollution; Pollution -- Environmental aspects; Periodicals; Electronic journals; 363.73
• DOI: 10.1016/j.envpol.2021.118499
• Languages: English
• ISSNs: 0269-7491

Abstract

Abstract: Nitrogen management measures (NMMs) such as the application of urease inhibitors (UIs), synthetic nitrification inhibitors (SNIs), and biochar (BC) are commonly used in mitigating nitrogen (N) loss and increasing fertilizer recovery efficiency (FRE) in agriculture. Calcareous soil under rice cropping is characterized by high nitrification potential, N loss risk, and low FRE. Application of SNIs may stimulate NH3 volatilization in high pH soils and the effects of SNIs on FRE are not always positive. BNIs have many advantages over SNIs. Whether combined application of BNI, UI, and BC that can result in a synergistic effect of improving FRE and decreasing N loss in a calcareous soil under rice cropping worth investigating. In this study, we conducted pot experiments to investigate the effects of single and co-application of BNI (methyl 3-(4-hydroxyphenyl) propionate or MHPP, 500 mg kg −1 soil), UI (N-( n -butyl), thiophosphoric triamide or NBPT, 2% of urea-N), or BC (wheat straw, 0.5% (w/w)) with chemical fertilizer on NH3 volatilization, N2 O emission, N leaching, crop N uptake, and FRE in a calcareous soil under rice cropping. Our results demonstrated that those NMMs could mitigate NH3 volatilization by 12.5%–26.5%, N2 O emission by 62.7%–73.5%, and N leaching loss by 17.5%–49.0%. However, BNI might have a risk of increasing NH3 (5.98%) volatilization loss. Among those NMMs, double inhibitors (BNI plus UI) yielded a synergistic effect that could mitigate N loss to the maximum extent and effectively improve FRE by 25.4%. The mechanisms of the above effects could be partly ascribed to the niche differentiation between the abundance of AOA and AOB and the changed community structure of AOB, which could further influence nitrification and N fate. Our results demonstrated that co-application of BNI and UI with urea is an effective strategy in reducing N loss and improving FRE in a calcareous soil under rice cropping. Highlights: UI, BNI and BC could mitigate NH3 volatilization, N2O emission and N leaching. BNI increased NH3 volatilization by 5.98% in calcareous soil under rice cropping. Double inhibitors improve fertilizer recovery efficiency by 25.4%. UI, BNI and BC lead to niche differentiation between AOA and AOB. BNI, UI and BC changed the community structure mainly of AOB.