Journal of Ecology and Rural Environment ›› 2019, Vol. 35 ›› Issue (5): 651-658.doi: 10.19741/j.issn.1673-4831.2018.0249

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Ammonia Volatilization Under Different Water Management and Nitrogen Schemes in a Paddy Field

WU Gang1, YUAN Man-man1, CAO Zhe-wei1, ZHANG Zhao-dong2, WANG Li-li2, WANG Yong-lu2, SUN Yi-xiang1   

  1. 1. Soil and Fertilizer Institute, Anhui Academy of Agricultural Sciences, Hefei 230031, China;
    2. Soil and Fertilizer Station of Dingyuan County, Dingyuan 233200, China
  • Received:2018-08-07 Online:2019-05-25 Published:2019-06-25


To provide a theoretical basis for reducing ammonia volatilization from paddy fields,the effects of different water management and nitrogen schemes on ammonia volatilization from paddy soil were studied. A field experiment was conducted to study the dynamics of ammonia volatilization by the closed airflow chamber method under a paddy ecosystem in the Jianghuai Hilly Region from June to September 2016. The results show that 52.92%-90.78% of total ammonia volatilization during the rice growth period occurred within the first 11 days after basal fertilization. A single basal application of slow-release urea combined with common urea reduced ammonia volatilization by 8.27%-14.22%. For conventional fertilization,ammonia volatilization under controlled irrigation decreased by 10.04% relative to that under conventional irrigation. A positive correlation was observed between ammonia volatilization and ammonium-nitrogen concentration in the surface water or 0-10 cm soil. The single basal application of slow-release urea combined with common urea under the water-saving irrigation treatment was identified to be a high-efficiency and environmental friendly model,referred to as the water-nitrogen application coupling management model.

Key words: water management, nitrogen management, paddy field, ammonia volatilization

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