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Int. J. Environ. Res. Public Health 2017, 14(10), 1177; https://doi.org/10.3390/ijerph14101177

Inhibitory Effects of 3,4-Dimethylpyrazole Phosphate on CH4 and N2O Emissions in Paddy Fields of Subtropical China

1,2,†
,
1,3,†
,
1,4
,
1,2
,
1,4,‡
and
1,2,*
1
School of Agriculture and Biology and Research Centre for Low Carbon Agriculture, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai 200240, China
2
Shanghai Urban Forest Research Station, State Forestry Administration, Shanghai 200240, China
3
Eco-Environmental Protection Research Institute, Shanghai Academy of Agricultural Sciences, 1000 Jinqi Road, Shanghai 201403, China
4
Key Laboratory for Urban Agriculture, Ministry of Agriculture, 800 Dongchuan Rd., Shanghai 200240, China
These authors contributed equally to this work.
Deceased.
*
Author to whom correspondence should be addressed.
Received: 22 August 2017 / Revised: 25 September 2017 / Accepted: 25 September 2017 / Published: 5 October 2017
(This article belongs to the Section Environmental Health)
View Full-Text   |   Download PDF [1754 KB, uploaded 10 October 2017]   |  

Abstract

3,4-Dimethylpyrazole phosphate (DMPP) has been widely employed to reduce nitrogen leaching and greenhouse gas emissions in the soils of dry farmlands. However, the effects of DMPP on the dynamics of nitrogen in paddy fields remain unclear. For this study, treatments with 0%, 0.25%, 0.5%, 1%, or 1.5% DMPP levels of nitrogen fertilization plus urea were designed to determine the effects on greenhouse gas emissions in paddy fields of subtropical China. All DMPP treatments significantly reduced CH4 and N2O emissions, from 54% to 34%, and 94% to 39%, respectively, compared with a urea fertilizer treatment alone. The soil NH4+ content decreased and NO3− increased more slowly with the application of DMPP. The crop yields under the various DMPP treatments showed no significant difference (p < 0.05). We concluded that the application of 0.5% and 1% DMPP may significantly reduce CH4 and N2O emissions in contrast to other treatments. This has important implications for the maintenance of rice yields, while reducing greenhouse gas emissions in paddy fields. View Full-Text
Keywords: DMPP; paddy field; urea fertilizer; greenhouse gas emission DMPP; paddy field; urea fertilizer; greenhouse gas emission
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Yin, S.; Zhang, X.; Jiang, Z.; Zhu, P.; Li, C.; Liu, C. Inhibitory Effects of 3,4-Dimethylpyrazole Phosphate on CH4 and N2O Emissions in Paddy Fields of Subtropical China. Int. J. Environ. Res. Public Health 2017, 14, 1177.

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