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＜departmental bulletin paper＞
A Preliminary Monitoring of the No_3-N Concentration in the Surface Water in the Paddy-Cultivated Area of the Central Red River Delta, Viet Nam 

Creator
Author PID
K001567
Creator Name
Kurosawa, Kiyoshi
黒澤, 靖
Affiliation
Affiliation Name
Land-Water resources and Environment Conservation Section, Institute of Topical Agriculture, Kyushu University
九州大学熱帯農学研究センター地水環境保全学
Creator Name
Hai Do, Nguyen
Affiliation
Affiliation Name
Faculty of Land and Water Resources Management, Hanoi Agricultural University
Creator Name
Canh Nguyen, Tat
Affiliation
Affiliation Name
Faculty of Land and Water Resources Management, Hanoi Agricultural University
Creator Name
Tanh Nguyen, Huu
Affiliation
Affiliation Name
Faculty of Land and Water Resources Management, Hanoi Agricultural University
Creator Name
Manh Nguyen, Dinh
Affiliation
Affiliation Name
Faculty of Land and Water Resources Management, Hanoi Agricultural University
Author PID
K001541
Creator Name
Egashira, Kazuhiko
江頭, 和彦
Affiliation
Affiliation Name
Laboratory of Soil Science, Division of Soil Science and Plant Production, Department of Plant Resources, Faculty of Agriculture, Kyushu University
九州大学農学部土壌学
Language
English
Publisher
Kyushu University
九州大学農学部
Date
2002-10-30
Source Title
Journal of the Faculty of Agriculture, Kyushu University
Vol
47
Issue
1
First Page
159
Last Page
165
Publication Type
Version of Record
Access Rights
open access
Crossref DOI
https://doi.org/10.5109/24469
Related DOI
九州大学農学部紀要 || 47(1) || p159-165
Journal of the Faculty of Agriculture, Kyushu University || 47(1) || p159-165
http://www.agr.kyushu-u.ac.jp/
Related URI
九州大学農学部紀要 || 47(1) || p159-165
Journal of the Faculty of Agriculture, Kyushu University || 47(1) || p159-165
http://www.agr.kyushu-u.ac.jp/
Relation
九州大学農学部紀要 || 47(1) || p159-165
Journal of the Faculty of Agriculture, Kyushu University || 47(1) || p159-165
http://www.agr.kyushu-u.ac.jp/

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Details

PISSN
0023-6152
NCID
AA00697606
Record ID
24469
Peer-Reviewed
Unrefereed
Subject Terms
NO_3-N concentration
Soil
Paddy field
pH level
ISSN
0023-6152
NCID
AA00697606
Notes
The NO_3-N concentration and pH in the surface water in the paddy-cultivated areas of the central Red River Delta, Vietnam were monitored at 24 sites of 5 districts in March 2002 after the spring rice was transplanted. In the areas, fertilizer N of 100-150 kg/ha has been conventionally applied in each of the three cultivations in a year. The measured NO_3-N concentration was in the range of 0.11-3.03 mg/L and was below the permissible level of 11.3 mg/L for drinking water, but some samples exceeded the standard for pH （8.5）. The districts could be separated from one another according to the combination of the NO_3-N and pH levels, but this separation was not due to the comparative land elevation. Relevant factors such as the soil pH, the amount and time of N application in every cultivation, and the NH_4 level are to be monitored in the future study. The NO_3-N concentration was negatively correlated with the pH level in some districts, possibly impacted by nitrification. No remarkable difference was observed in both the NO_3-N and pH levels between the ponding water of the paddy field and the water of the neighboring irrigation/drainage canal.
Created Date 2012.08.02
Modified Date 2022.11.11

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