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Research article - Peer-reviewed, 2021

Grain Quality of Maize Cultivars as a Function of Planting Dates, Irrigation and Nitrogen Stress: A Case Study from Semiarid Conditions of Iran

Jahangirlou, Maryam Rahimi; Akbari, Gholam Abbas; Alahdadi, Iraj; Soufizadeh, Saeid; Parsons, David

Abstract

Maize grain is an important source of human and animal feed, and its quality can be affected by management practices and climatic conditions. This study aimed to evaluate the concentration and composition of starch, protein and oil in grain of maize cultivars in response to different planting dates (20 June and 21 July), irrigation (12-day and 6-day intervals) and nitrogen rates (0 and 184 kg N ha(-1)). The first two principal components (PCs) accounted for 84.5% of the total variation. High N fertilization increased protein (by 6.0 and 10.9 g kg(-1)) and total nonessential amino acids (by 3.4 and 2.4 g kg(-1)) during 2018 and 2019, respectively. With the high irrigation rate, the high N rate increased oil, total unsaturated fatty acids, and starch and amylopectin, whereas with the low irrigation rate, there was no effect of the N rate. With earlier planting, total saturated fatty acids were higher. The findings highlight the complicated relationship between the different factors and how they affect quality characteristics of maize grain. There was a large impact of year, which to a great extent cannot be controlled, even in this environment where water supply was controlled and rainfall did not affect the results.

Keywords

amino acids; fatty acids; oil; protein; starch; Zea mays L

Published in

Agriculture
2021, volume: 11, number: 1, article number: 11

Authors' information

Jahangirlou, Maryam Rahimi (Jahangirlou, Maryam Rahimi)
University of Tehran
Rahimi Jahangirlou, Maryam
Swedish University of Agricultural Sciences, Department of Agricultural Research for Northern Sweden
Akbari, Gholam Abbas
University of Tehran
Alahdadi, Iraj
University of Tehran
Soufizadeh, Saeid
Shahid Beheshti University
Swedish University of Agricultural Sciences, Department of Agricultural Research for Northern Sweden

UKÄ Subject classification

Agricultural Science

Publication Identifiers

DOI: https://doi.org/10.3390/agriculture11010011

URI (permanent link to this page)

https://res.slu.se/id/publ/112344