Yield-scaled N2O and CH4 emissions as affected by combined application of stabilized nitrogen fertilizer and pig manure in rice fields

Kaikuo Wu, Ping Gong, Lili Zhang, Zhijie Wu, Xueshi Xie, Hengzhe Yang, Wentao Li, Yuchao Song and Dongpo Li
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Kaikuo Wu: Instituteof Applied Ecology, Chinese Academy of Sciences, Shenyang, P.R. China
Ping Gong: Instituteof Applied Ecology, Chinese Academy of Sciences, Shenyang, P.R. China
Lili Zhang: Instituteof Applied Ecology, Chinese Academy of Sciences, Shenyang, P.R. China
Zhijie Wu: Instituteof Applied Ecology, Chinese Academy of Sciences, Shenyang, P.R. China
Xueshi Xie: Stanley Agriculture Group Co., Ltd., Shandong, P.R. China
Hengzhe Yang: Stanley Agriculture Group Co., Ltd., Shandong, P.R. China
Wentao Li: Instituteof Applied Ecology, Chinese Academy of Sciences, Shenyang, P.R. China
Yuchao Song: Instituteof Applied Ecology, Chinese Academy of Sciences, Shenyang, P.R. China
Dongpo Li: Instituteof Applied Ecology, Chinese Academy of Sciences, Shenyang, P.R. China

Plant, Soil and Environment, 2019, vol. 65, issue 10, 497-502

Abstract: A field experiment was conducted to study the effects of stabilized nitrogen fertilizer combined with pig manure on rice yield and nitrous oxide (N2O) and methane (CH4) emissions. Four treatments were established: urea (U); pig manure (PM); PM and urea (PM + U); PM and stabilized nitrogen fertilizer (urea plus 1% NBPT (N-(n-butyl) thiophosphoric triamide), 1% PPD (phenylphosphorodiamidate) and 2% DMPP (3,4-dimethylpyrazole phosphate)) (PM + U + I). In this study, compared with PM, PM + U significantly increased cumulative N2O emission, but PM + U + I showed no significant difference from PM on N2O cumulative emission, indicating that stabilized nitrogen fertilizer combined with PM is effective at reducing N2O emissions. The cumulative emission of CH4 from PM + U + I treatment was significantly lower than that from PM and PM + U, indicating that stabilized nitrogen fertilizer combined with PM can effectively reduce CH4 emissions as well. The yields of PM + U and PM + U + I were not significantly different from those of U and PM, indicating that local conventional nitrogen application and returns of PM can provide sufficient nitrogen for rice growth. For yield-scaled emissions (YSE), PM was the highest, while PM + U + I significantly decreased YSE. Concomitant application of stabilized nitrogen fertilizer can achieve the goal of reducing YSE when PM is returned to the field.

Keywords: global warming potential; static chamber method; Oryza sativa L.; nitrification (search for similar items in EconPapers)
Date: 2019
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:65:y:2019:i:10:id:286-2019-pse

DOI: 10.17221/286/2019-PSE

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