RESEARCH ARTICLE


Assessment of Mineralized Nitrogen During Maize Growth Succeeding Different Winter Cover Crops in the Mediterranean Environment



Adelaide Perdigão1, 2, 3, *
iD
, José L. S. Pereira2, 3
iD
, Nuno Moreira2, Henrique Trindade2, João Coutinho4
1 CERNAS-IPV Research Centre, Polytechnic Institute of Viseu, Campus Politécnico, Repeses, 3504-510 Viseu, Portugal
2 Centre for the Research and Technology of Agro-Environmental and Biological Sciences (CITAB), Inov4Agro, University of Trás-os-Montes and Alto Douro, Quinta de Prados, 5000-801 Vila Real, Portugal
3 Agrarian School of Viseu, Polytechnic Institute of Viseu, Quinta da Alagoa, 3500-606 Viseu, Portugal
4 Chemistry Centre, University of Trás-os-Montes and Alto Douro, Quinta de Prados, 5000-801 Vila Real, Portugal


Article Metrics

CrossRef Citations:
0
Total Statistics:

Full-Text HTML Views: 308
Abstract HTML Views: 121
PDF Downloads: 210
ePub Downloads: 71
Total Views/Downloads: 710
Unique Statistics:

Full-Text HTML Views: 177
Abstract HTML Views: 83
PDF Downloads: 122
ePub Downloads: 56
Total Views/Downloads: 438



Creative Commons License
© 2022 Perdigão et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Agrarian School of Viseu, Polytechnic Institute of Viseu, Quinta da Alagoa, 3500-606 Viseu, Portugal; Tel: +351232446600; Fax: +351232426536; E-mail aperdigao25@gmail.com


Abstract

Background:

Understanding soil nitrogen (N) dynamics is essential to find alternative N sources and improve N use efficiency in agriculture.

Objective:

The aim of this study was to assess N mineralization rates from residues of winter cover crops, during maize crop season, under Mediterranean conditions.

Methods:

A field experiment was carried out from May to September in central Portugal, with four replications, two sowing dates of cover crops (15/10/2011 and 29/11/2011) and three cover crops residues (balansa clover, ryegrass and yellow lupine) that were incorporated in the soil. Plots were cropped with local maize and net N mineralization was measured during the crop cycle, using soil cylinders placed inside micro-perforated polyethylene bags.

Results and Discussion:

Early sowing of the cover crops residues increased the NH4+ and NO3- contents in the soil. Yellow lupine residue had the highest rate of daily N mineralization (0.71 mg N kg-1 day-1). For all treatments, the highest mineralization rate was found in the last incubation period, ranging between 0.78 mg N kg-1 day-1 and 1.84 mg N kg-1 day-1, both for balansa clover, from the second and the first sowing date, respectively.

Conclusion:

The present study suggests that, under Mediterranean field conditions, cover crops residue of Italian ryegrass, balansa clover and yellow lupin can be used as a nitrogen source namely for sustainable maize crops.

Keywords: Balansa clover, N mineralization, N sources, Ryegrass, Yellow lupine, Crops.