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Assessing nitrification and denitrification in a paddy soil with different water dynamics and applied liquid cattle waste using the N-15 isotopic technique

文献类型： 外文期刊

作者： Zhou, Sheng 1 ; Sakiyama, Yukina 3 ; Riya, Shohei 3 ; Song, Xiangfu 2 ; Terada, Akihiko 1 ; Hosomi, Masaaki 1 ;

作者机构： 1.Tokyo Univ Agr & Technol, Inst Engn, Koganei, Tokyo 1848588, Japan

2.Shanghai Acad Agr Sci, Ecoenvironm Protect Inst, Shanghai 201403, Peoples R China

3.Tokyo Univ Agr & Technol, Grad Sch Engn, Koganei, Tokyo 1848588, Japan

关键词： Denitrification;Nitrate reduction;Nitrification;N-15 isotope;Infiltration rate;Liquid cattle waste

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：7.963； 五年影响因子：7.842 ）

ISSN： 0048-9697

年卷期： 2012 年 430 卷

页码：

收录情况： SCI

摘要： Using livestock wastewater for rice production in paddy fields can remove nitrogen and supplement the use of chemical fertilizers. However, paddy fields have complicated water dynamics owing to varying characteristics and would influence nitrogen removal through nitrification followed by denitrification. Quantification of nitrification and denitrification is of great importance in assessing the influence of water dynamics on nitrogen removal in paddy fields. In this study, nitrification and nitrate reduction rates with different water dynamics after liquid cattle waste application were evaluated, and the in situ denitrification rate was determined directly using the N-15 isotopic technique in a laboratory experiment A significant linear regression correlation between nitrification and the nitrate reduction rate was observed and showed different regression coefficients under different water dynamics. The regression coefficient in the continuously flooded paddy soil was higher than in the drained-reflooded paddy soil, suggesting that nitrate would be consumed faster in the flooded paddy soil. However, nitrification was limited and the maximum rate was only 13.3 mu g N g(-1) day(-1) in the flooded paddy soil with rice plants, which limited the supply of nitrate. In contrast, the drained-reflooded paddy soil had an enhanced nitrification rate up to 56.8 mu g N g(-1) day(-1), which was four times higher than the flooded paddy soil and further stimulated nitrate reduction rates. Correspondingly, the in situ denitrification rates determined directly in the drained-reflooded paddy soil ranged from 5 to 1035 mg N m(-2) day(-1), which was higher than the continuously flooded paddy soil (from 5 to 318 mg N m(-2) day(-1)) during the vegetation period. The nitrogen removal through denitrification accounted for 38.9% and 9.9% of applied nitrogen in the drained-reflooded paddy soil and continuously flooded paddy soil, respectively. (C) 2012 Elsevier B.V. All rights reserved.

  • 相关文献

[1]Denitrification-dependent anammox activity in a permanently flooded fallow ravine paddy field. Zhou, Sheng,Borjigin, Sodbilig,Riya, Shohei,Hosomi, Masaaki,Borjigin, Sodbilig.

[2]The relationship between anammox and denitrification in the sediment of an inland river. Zhou, Sheng,Zhou, Sheng,Borjigin, Sodbilig,Riya, Shohei,Terada, Akihiko,Hosomi, Masaaki.

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