文献类型： 外文期刊

作者： Liang Xinqiang ¹ ; Li, Yuan Jun ¹ ; He Miaomiao ² ; Hua, Li ³ ; Liang, Li ¹ ; Tian Guangming ¹ ;

作者机构： 1.Zhejiang Univ, Coll Nat Resources & Environm Sci, Hangzhou 310058, Zhejiang, Peoples R China

2.Hangzhou Normal Univ, Dept Life & Environm Sci, Hangzhou 310036, Zhejiang, Peoples R China

3.Zhejiang Acad Agr Sci, Hangzhou 310021, Zhejiang, Peoples R China

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.