Journal of Ecology and Rural Environment ›› 2016, Vol. 32 ›› Issue (6): 870-878.doi: 10.11934/j.issn.1673-4831.2016.06.002

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Review of Researches on Factors Affecting Emission of Ammonia From Agriculture

WANG Wen-lin1, LIU Bo2, HAN Rui-ming3, WANG Ye2, LIU Xiao2, XU Qiao2, LI Wen-jing1, TANG Xiao-yan1   

  1. 1. Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing 210042, China;
    2. School of Geography Science, Nantong University, Nantong 226007, China;
    3. School of Environment, Nanjing Normal University, Nanjing 210023, China
  • Online:2016-11-25 Published:2016-11-30

Abstract:

Ammonia (NH3) as an alkaline gas in the atmosphere plays a key role in the formation of haze. Control of NH3 emission at source is hence particularly important to reduction of the concentrations of secondary inorganic salts and PM2.5 in the atmosphere, control of haze pollution, and improvement of air environment quality. Agriculture is a major source of anthropogenic NH3 emitted into the atmosphere, and farmland fertilization and livestock and poultry breeding are the two major sources in agriculture. Therefore, the review summarized the researches at home and abroad on NH3 emissions from agriculture and analyzed factors affecting NH3 emissions, which is of fundamental significance to the understanding of the process and characteristics of NH3 emission and designing corresponding control measures. It has been found that fertilizer type, soil physic-chemical properties, field meteorological elements and fertilization practice are the main factors affecting NH3 emission from farmland fertilization. Nature of feed, barn environment and dung disposal mode are the main factors affecting NH3 emission from livestock and poultry breeding. However, currently the researches on NH3 emission from farmland fertilization proceed from the aspects of geochemical recycling of N in farmlands and N demand for higher grain yield, while the researches on NH3 emission from livestock and poultry breeding do from the aspects of occupation alhygiene and health, both lacking the concerns about the target of controlling the risk of environmental exposure of NH3 emission. Hence, it is proposed to unfold studies on emission coefficient of NH3 from agricultural sources with the ambient air as emission interface, determination of priority control zones of NH3 emissions from agricultural sources, and in the end provision of theoretical basis for formulation of a technical system, strategies, route maps and standards for sub-zonal control of agricultural NH3 emission, and formation of relevant policies and regulations for environmental management authorities.

Key words: agriculture source, ammonia emission, farmland fertilization, livestock and poultry breeding, influencing factor

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