Two-dimensional analysis of nitrate nitrogen movement under drip irrigation

Koichi Nomura, Kozue Yuge, Yoshiyuki Shinogi

Research output: Contribution to journalArticlepeer-review

Abstract

The objective of this paper was to clarify the temporal and spatial two-dimensional variations of volumetric water content and NO 3-N concentration in soil under drip irrigation. A numerical model was used for estimating temporal and spatial movements of water and NO 3-N in soil. Laboratory experiments were conducted to estimate the physical properties such as soil water retentivity and conductivity. A field observation was conducted to evaluate the model accuracy. The temporal and spatial changes of volumetric water content and NO 3-N concentration in soil were measured in a 1 m×l m×1 m lysimeter where NH 4NO 3 solution was supplied in a row. The results of simulation calculated by the model agreed well with observed data. By using the model, temporal and spatial variations of soil water content and NO 3-N concentration were calculated. The results described simultaneous movements of water and NO 3-N spreading in a soil profile. The numerical model introduced here can be effective to estimate variations of water and NO 3-N in soil.

Original languageEnglish
Pages (from-to)389-393
Number of pages5
JournalJournal of the Faculty of Agriculture, Kyushu University
Volume56
Issue number2
Publication statusPublished - Sep 1 2011

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Agronomy and Crop Science

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