Comparison of nitrification inhibitors to restrict nitrate leaching in a maize crop irrigated under mediterranean conditions

Diez, J.A. and Arauzo, M. and Hernaiz, P.J. and Sanz Cobeña, Alberto and Vallejo Garcia, Antonio (2010). Comparison of nitrification inhibitors to restrict nitrate leaching in a maize crop irrigated under mediterranean conditions. "Spanish Journal of Agricultural Research", v. 8 (n. 2); pp. 481-492. ISSN 1695-971X.

Description

Title: Comparison of nitrification inhibitors to restrict nitrate leaching in a maize crop irrigated under mediterranean conditions
Author/s:
  • Diez, J.A.
  • Arauzo, M.
  • Hernaiz, P.J.
  • Sanz Cobeña, Alberto
  • Vallejo Garcia, Antonio
Item Type: Article
Título de Revista/Publicación: Spanish Journal of Agricultural Research
Date: January 2010
ISSN: 1695-971X
Volume: 8
Subjects:
Freetext Keywords: dicyandiamide; dimethylpyrazolephosphate; N fertilization; split N application
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Química y Análisis Agrícola [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The aim of this paper was to compare dicyandiamide (DCD) and 3,4 dimethylpyrazole phosphate (DMPP) as inhibitors of ammonium oxidation and nitrate leaching after applying fertilizer to a maize (Zea mays L.) crop grown under Mediterranean conditions. The effects of nitrification inhibitors were also compared to those of N fertilization without inhibitors and with split N application. In plots fertilized with ammonium sulphate nitrate (ASN), either DCD or DMPP lengthened ammonium presence in soil and produced lower soil NO3- concentrations (30% lower than in plots with no inhibitor). The use of DCD or DMPP achieved significant reductions in nitrate leaching. DCD showed excellent properties for controlling nitrate leaching, taking into account the fact that grain yield and N accumulated by plant were similar for the ASN-DCD and ASN treatments applied at the same N doses. The split N treatment did not offer any advantages in terms of leached nitrate, either with the use of single ammonium sulphate nitrate (ASN) or with single application of nitrification inhibitors. The nitrification inhibitors did not increase the yield but did not reduce it either. The drainage rate was the most important component of nitrate leaching. The low drainage values of the first year resulted in a sharp decline of nitrate leaching. However, the experiment of the second year, showed clear differences in nitrate leaching between treatments due to the greater drainage.

More information

Item ID: 8530
DC Identifier: http://oa.upm.es/8530/
OAI Identifier: oai:oa.upm.es:8530
Official URL: http://revistas.inia.es/index.php/sjar
Deposited by: Memoria Investigacion
Deposited on: 12 Aug 2011 09:54
Last Modified: 20 Apr 2016 17:16
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