Nitrogen removal in paddy fields: An option for water quality improvement in rivers

被引：4

作者：

Ichino, K ^{[1
]}

Kasuya, M

机构：

[1] Aichi Univ, Dept Gen Educ, Biol Lab, Toyohashi, Aichi 4418108, Japan

[2] Aichi Ken Agr Res Ctr, Aichi 4801103, Japan

来源：

ECOLOGICAL ENGINEERING | 1998年 / 10卷 / 02期

关键词：

Mikawa Bay; nitrogen removal; paddy field; water catchment;

D O I：

10.1016/S0925-8574(98)00021-4

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

The spatial distribution of soluble inorganic nitrogen concentrations in the surface waters flowing on a paddy field in southwest Japan was studied. Nitrate concentrations decreased exponentially with the distance from the inlet point of irrigation. The half-value distance was about 24 m during summer conditions at a water depth of ca. 10 cm and a flow rate of ca. 1 mm s(-1). Based on findings, it was estimated that only 5% of the total area of paddy fields is needed to remove half of the nitrogen loadings from small streams to the water catchment area of Atsumi Bay, the inner part of Mikawa Bay. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：159 / 164

页数：6