文章基本信息

标题：IMPACT OF CONTROLLED-RELEASE NITROGEN FERTILIZERS ON AMMONIA VOLATILIZATION FROM PADDY FIELDS UNDER WATER-SAVING IRRIGATION
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作者：Shihong Yang ; Jiwen Li ; Junzeng Xu 等
期刊名称：Fresenius Environmental Bulletin
印刷版ISSN：1018-4619
出版年度：2018
卷号：27
期号：11
页码：7139-7147
语种：English
出版社：PSP Publishing
摘要：The impact of controlled-release nitrogen fertilizers (CRN) on ammonia volatilization from paddy fields under water-saving irrigation is investigated. The rice yield, nitrogen uptake, efficiency of water and nitrogen fertilizer use, and ammonia volatilization from paddy fields with CRN and water-saving irrigation were analyzed based on a two-year field experiment. The results show that the application of CRN reduced nitrogen fertilizer input by 29.77% and decreased nitrogen uptake by 4.43%, but it maintained rice yields and significantly increased nitrogen recovery by 27.78% of paddy fields under watersaving irrigation. In addition, CRN substantially reduced the peak amounts and ammonia volatilization rates of paddy fields under water-saving irrigation. The ammonia volatilization rate of paddy fields in the entire growth stage was significantly lower compared with those of traditional water and nitrogen management (p<0.05). The slow-release characteristics of CRN prevented the weekly peaks of ammonia volatilization from paddy fields under water-saving irrigation and reduced total ammonia volatilization ORVVE\FRPSDUHGZLWKWKRVHRIWKHIDUPHUV¶ fertilization practice. The period of rapid increase of cumulative ammonia volatilization loss was within 30 days after transplanting when CRN management was implemented. The first-order kinetic equation can be used to predict the cumulative ammonia volatilization loss in paddy fields with different nitrogen fertilizer management scenarios under watersaving irrigation. The overall findings show that CRN management is an effective technique for mitigating ammonia volatilization and maintaining rice yields of paddy fields under water-saving irrigation.
关键词：Water irrigation;controlled-release nitrogen fertilizer;Paddy field;Ammonia volatilization;Accumulation