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《Journal of Soil and Water Conservation》 2017-04
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Study on the Ammonia Volatilization Under Different Nitrogen Schemes from Paddy Field in Jianghuai Hilly Region

WU Gang;YUAN Manman;CAO Zhewei;ZHANG Zhaodong;WANG Lili;SUN Yixiang;Soil and Fertilizer Institute,Anhui Academy of Agricultural Sciences;Soil and Fertilizer Station of Dingyuan County;  
Ammonia volatilization was a major path of nitrogen losses in Paddy field.In order to evaluate the effects of different nitrogen schemes on ammonia volatilization and nitrogen use efficiency from paddy field in Jianghuai hilly region,a field experiment by the closed airflow chamber method was conducted.The results showed that the ammonia volatilization loss ratio was the highest at tillering stage,followed by basal stage,finally heading stage.Compared with the conventional fertilization,the ammonia volatilization loss amount and ratio under the application of slow-release urea combined with common urea were decreased by 26.23%and 4.52%,respectively,while the nitrogen use efficiency increased by 6.07%.Ammonia volatilization loss was positive correlated with ammonium nitrogen concentration on the surface water.Therefore,the application of slow-release urea combined with common urea can not only reduce ammonia volatilization loss,but also obtain higher economic benefit,which is suitable to be recommended in Jianghuai hilly region.
【Fund】: 国家重点研发计划项目“长江中下游水稻化肥农药减施增效技术集成研究与示范”(2016YFD0200800);; 安徽省农科院科技创新团队项目“水旱轮作最佳养分管理”(13C1008);; 院长青年创新基金项目“江淮丘陵稻区氮肥的氨挥发及其影响因素研究”(15B1018)
【CateGory Index】: S511
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