Nitrate leaching in a silage maize field under different irrigation and nitrogen fertilizer rates

被引：237

作者：

Gheysari, Mahdi ^{[1
,4
]}

Mirlatifi, Seyed Majid ^{[1
]}

Homaee, Mehdi ^{[2
]}

Asadi, Mohammad Esmaeil ^{[3
]}

Hoogenboom, Gerrit ^{[4
]}

机构：

[1] Tarbiat Modares Univ, Dept Irrigat & Drainage Engn, Tehran, Iran

[2] Tarbiat Modares Univ, Dept Soil Sci, Tehran, Iran

[3] Agr & Nat Res Ctr Golestan Prov, Dept Agr Engn Res, Gorgan, Iran

[4] Univ Georgia, Dept Biol & Agr Engn, Griffin, GA 30223 USA

来源：

AGRICULTURAL WATER MANAGEMENT | 2009年 / 96卷 / 06期

关键词：

Sprinkler irrigation; Fertigation; Nitrogen; Environment; Water quality; Deficit irrigation; SPRINKLER IRRIGATION; DEFICIT IRRIGATION; WATER-BALANCE; SANDY SOIL; CORN; YIELD; CROP; FERTIGATION; PERCOLATION; IMPACTS;

D O I：

10.1016/j.agwat.2009.01.005

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Quantification of the interactive effects of nitrogen (N) and water on nitrate (NO3) loss provides an important insight for more effective N and water management. The goal of this study was to evaluate the effect of different irrigation and nitrogen fertilizer levels on nitrate-nitrogen (NO3-N) leaching in a silage maize field. The experiment included four irrigation levels (0.7, 0.85, 1.0, and 1.13 of soil moisture depletion, SMID) and three N fertilization levels (0, 142, and 189 kg N ha(-1)), with three replications. Ceramic suction cups were used to extract soil solution at 30 and 60 cm soil depths for all 36 experimental plots. Soil NO3-N content of 0-30 and 30-60-cm layers were evaluated at planting and harvest maturity. Total N uptake (NU) by the crop was also determined. Maximum NO3-N leaching out of the 60-cm soil layer was 8.43 kg N ha(-1), for the 142 kg N ha(-1) and over irrigation (1.13 SMD) treatment. The minimum and maximum seasonal average NO3 concentration at the 60 cm depth was 46 and 138 mg l(-1), respectively. Based on our findings, it is possible to control NO3 leaching out of the root zone during the growing season with a proper combination of irrigation and fertilizer management. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：946 / 954

页数：9

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