文献类型：期刊文献

英文题名：Nitrapyrin coupled with organic amendment mitigates N2O emissions by inhibiting different ammonia oxidizers in alkaline and acidic soils

作者：Tao, Rui[1,2];Zhao, Xiran[1];Wu, Xiaoliang[1];Hu, Baowei[1];Vanyanbah, Kollie B.[1];Li, Jun[1];Chu, Guixin[1]

机构：[1]Shaoxing Univ, Sch Life Sci, Shaoxing 312000, Zhejiang, Peoples R China;[2]Zhejiang Univ, Coll Environm Resource Sci, Minist Educ, Key Lab Environm Remediat & Ecol Hlth, Hangzhou 310058, Zhejiang, Peoples R China

年份：2021

卷号：166

外文期刊名：APPLIED SOIL ECOLOGY

收录：SCI-EXPANDED(收录号：WOS:000679311300005)、、WOS

基金：This work was jointly supported by grants from the Basic Public Welfare Research Project of Zhejiang Province (LGN20C150003), and the Fundamental Research Funds for the Central Universities (2020FZZX001-06).

语种：英文

外文关键词：Organic amendment; Nitrification inhibitor; Nitrous oxide; Ammonia oxidizers; Soil nitrogen balance

外文摘要：The aim of this study was to investigate the combined effects of organic manure and nitrification inhibitor on nitrogen (N) transformation, nitrous oxide (N2O) emissions and the gene abundance of ammonia oxidizers in acidic and alkaline soils. Therefore, an incubation experiment was conducted with red (pH 5.51) and calcareous soils (pH 8.12) collected from Hunan Province and Xinjiang Autonomous Region of China, respectively, including four different treatments as follows: CK (no fertilizer), U (only urea), UM (60% urea-N plus cattle manure-N), UMCP (UM + nitrapyrin). The results showed that UMCP treatment significantly increased retention time of ammonium nitrogen (NH4+-N) in both red and calcareous soils (P < 0.05), compared with the treatments of CK, U and UM. The inhibitory efficiency of nitrapyrin, based on the ratio of NH4+-N/NO3-N, was nearly twice higher in calcareous soil (71 days) than that in red soil (36 days). The potential nitrification rates (PNR) were significantly increased by the urea or urea plus manure application, but were greatly reduced by nitrapyrin addition. Nitrapyrin addition significantly inhibited the gene abundance of ammonia-oxidizing bacteria (AOB) in calcareous soil, whereas inhibited the ammonia-oxidizing archaea (AOA) growth in red soil. UMCP treatment lowered N2O emissions and increased N recovery compared with UM. Linear regression analysis showed that PNR was positively correlated with AOB (P = 0.048) and AOA abundance (P = 0.0014) in red soil, but only correlated with AOB (P = 0.0032) in calcareous soil. Random forest and structural equation model (SEM) analyses revealed that pH, NH4+-N and organic carbon (SOC) were the key factors affecting the abundance of AOA and AOB, and AOA contributes more to N2O emissions than AOB from red soil, whilst only AOB is highly responsible for the N2O production from calcareous soil. Our result suggests that nitrapyrin plus organic amendment could be serving as an effective fertilization scenario on mitigating N2O emissions and enhancing N recovery and utilization in acidic and alkaline soils.