Modeling the fate of fertilizer N in paddy rice systems receiving manure and urea
文献类型: 外文期刊
第一作者: Liang Xinqiang
作者: Liang Xinqiang;Li, Yuan Jun;Liang, Li;Tian Guangming;He Miaomiao;Hua, Li
作者机构:
关键词: Ammonia volatilization;Lateral seepage;N leaching;Rice fields;Swine manure
期刊名称:GEODERMA ( 影响因子:6.114; 五年影响因子:6.183 )
ISSN: 0016-7061
年卷期: 2014 年 228 卷
页码:
收录情况: SCI
摘要: Manure is one of the most important N sources in paddy rice systems, while it poses a great challenge in meeting rice N requirement and simultaneously reduces adverse environmental impacts. The main objective of this study was to design a simple model for assessing N fate in swine manure amended paddy rice systems. A field experiment was conducted for three cropping seasons to determine the effectiveness of different swine manure amended levels (15%, 30%, and 45% of total N applied) on N transformations and seasonal N fate. Based on field observation data, simulation results clearly showed peaks of various N transformation rates appeared within 2 similar to 3 days after each fertilization. There was an apparent contribution of manure N on N uptake and loss when amount of manure applied was at optimum. However, at supra optimal rate, addition of manure N showed no effect on N uptake of crop and the corresponding N transformations. Across three levels, seasonal ammonia volatilization accounted for 35.6% similar to 38.0% of total N applied, N uptake was 36.7% similar to 41.1%, while N losses via vertical leaching, lateral seepage were 3.9% similar to 4.5% and 4.4% similar to 4.8%, respectively. These results were well predicted by our specific designed model, indicating the model performed effectively at assessing individual transformation process and its associated N fate and help develop efficient management strategies for swine manure amended paddy rice systems. (C) 2013 Elsevier B.V. All rights reserved.
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