Volume 70, Issue 4 pp. 634-643
RESEARCH ARTICLE

Effect of urea fertilizer concentration on water and nitrogen transport and transformation in soil in a film-hole multi-line interference infiltration system*

Yunfei Tuo

Corresponding Author

Yunfei Tuo

Ecology and Environment Department in Southwest Forestry University, Kunming, China

Correspondence

Yunfei Tuo, PhD Master Supervisor, Associate Professor, Major in agricultural water resources planning and utilization, Southwest Forestry University, Kunming, Yunnan, Kunming 650224, China.

Email: [email protected]

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Fangyuan Shen

Fangyuan Shen

Ecology and Environment Department in Southwest Forestry University, Kunming, China

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Cuiping Yang

Cuiping Yang

Ecology and Environment Department in Southwest Forestry University, Kunming, China

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Lijuan Zhang

Lijuan Zhang

Ecology and Environment Department in Southwest Forestry University, Kunming, China

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Fei Wang

Fei Wang

Ecology and Environment Department in Southwest Forestry University, Kunming, China

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Qian Wang

Qian Wang

Ecology and Environment Department in Southwest Forestry University, Kunming, China

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Yang Zheng

Yang Zheng

Ecology and Environment Department in Southwest Forestry University, Kunming, China

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Wenjuan Du

Wenjuan Du

Ecology and Environment Department in Southwest Forestry University, Kunming, China

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First published: 07 March 2021
Citations: 2
*

Effet de la concentration d'engrais à base d'urée sur le transport et la transformation de l'eau et de l'azote dans le sol dans un système d'infiltration d'interférence multiligne poreu.

Funding information: The Project of the National Natural Science Foundation of China, Grant/Award Number: 51279157

Abstract

en

The objective of this study was to elucidate the effects of urea concentration on soil water distribution and nitrogen transport and transformation.

Soil box tests were carried out in the laboratory for the multidirectional cross-infiltration of urea fertilizer solutions with concentrations of 2.0, 4.0, 6.0 and 8.0 g l¯¹ to study the characteristics of soil water distribution and nitrogen transport and transformation in the process of multidirectional infiltration of urea fertilizer solutions with different concentrations.

Under the same irrigation time, the soil moisture content and ammonium and nitrate nitrogen increased with increasing fertilizer concentration. At the same fertilizer concentration, the soil moisture content and ammonium and nitrate nitrogen increased with increasing irrigation time. At the same distribution time, the soil moisture content and its rate of decrease increased with increasing fertilizer concentration.

The correlation coefficients of the empirical formula were all greater than 0.90, and the standard error was very low. Moreover, based on a significance test at the 0.05 significance level, it could be seen that this empirical formula reflected the soil water distribution and nitrogen transport and transformation rules in multidirectional confluence infiltration through membrane holes with different fertilizer concentrations.

Résumé

fr

Cette étude a pour objectif de déterminer l'influence de la concentration en urée sur la répartition de l'eau dans le sol et le transport et la transformation de l'azote.

Nous avons étudié les caractéristiques de la distribution de l'eau dans le sol et de la migration de l'azote lors de l'infiltration multidirectionnelle de solutions d'engrais uréiques à différentes concentrations, en utilisant des essais d'infiltration multidirectionnelle en chambre de sol à des concentrations de 2,0, 4,0, 6,0 et 8,0 g l¯¹.

Pour la même durée d'injection, l'humidité du sol, l'azote ammoniacal et l'azote nitrique augmentent avec la concentration d'engrais. A la même concentration d'engrais, la teneur en humidité du sol, en azote ammoniacal et en azote nitrique augmente avec la durée d'irrigation. Au cours de la même période de distribution, la teneur en eau du sol et son taux de diminution augmentent avec la concentration en engrais.

Les coefficients de corrélation des formules empiriques sont tous supérieurs à 0.90, avec une erreur type très faible, et le test de signification avec un niveau de signification de 0.05 permet de conclure que les formules empiriques reflètent les lois de la distribution de l'eau et de la migration et de la transformation de l'azote dans le sol sous différentes concentrations d'engrais.

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