| Assessing nitrification and denitrification in a paddy soil with different water dynamics and applied liquid cattle waste using the (15)N isotopic technique. | |
| | |
MedLine Citation:
|
PMID: 22634555 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
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 (15)N 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 13.3μgNg(-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 56.8μgNg(-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 1035mgNm(-2)day(-1), which was higher than the continuously flooded paddy soil (from 5 to 318mgNm(-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. |
| | |
Authors:
|
Sheng Zhou; Yukina Sakiyama; Shohei Riya; Xiangfu Song; Akihiko Terada; Masaaki Hosomi |
Related Documents
:
|
20214435 - Roles of enzymatic and nonenzymatic antioxidants in plants during abiotic stress. 22895775 - Trait dissection of salinity tolerance with plant phenomics. 19286935 - The arabidopsis ring finger e3 ligase rha2a is a novel positive regulator of abscisic a... 15694285 - Why boron? 12026075 - Effect of roundup ultra on microbial activity and biomass from selected soils. 23445825 - Emasculation increases seed set in the bird-pollinated hermaphrodite kniphofia linearif... |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2012-5-24 |
Journal Detail:
|
Title: The Science of the total environment Volume: 430C ISSN: 1879-1026 ISO Abbreviation: - Publication Date: 2012 May |
Date Detail:
|
Created Date: 2012-5-28 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 0330500 Medline TA: Sci Total Environ Country: - |
Other Details:
|
Languages: ENG Pagination: 93-100 Citation Subset: - |
Copyright Information:
|
Copyright © 2012 Elsevier B.V. All rights reserved. |
Affiliation:
|
Institute of Engineering, Tokyo University of Agriculture & Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan; Eco-environmental Protection Institute, Shanghai Academy of Agricultural Sciences, 1000 Jinqi Road, Shanghai 201403, China. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: A new improved study of cyanotoxins presence from experimental cyanobacteria concentrations in the T...
Next Document: Ragweed pollen observed in Turkey: Detection of sources using back trajectory models.