Water and nitrogen productivity of maize under semiarid environments

Hafiz Mohkum Hammad, Ashfaq Ahmad, Farhat Abbas, Wajid Farhad, Bernardo Chaves Cordoba, Gerrit Hoogenboom

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

Irrigated agriculture is a facing shortage of water and N in semiarid environments where these inputs are limiting factors for crop production. Experiments were conducted to optimize the water and N requirements for maize (Zea mays L.) under semiarid environmental conditions. Crop physiological and agronomics characteristics were evaluated for three irrigation regimes and five N fertilizer levels during 2009 and 2010. The experiments were conducted in a splitplot design by triplicating water regimes in the main plots and N levels in the subplots. Total dry matter production and crop growth rate increased with an increase in the N application rate up to 300 kg ha-1 for all irrigation regimes. In contrast, maximum grain yield was achieved with application of 250 kg N ha-1. Polynomial analysis (third order) showed that 275 kg N ha-1 was optimum for grain yield at normal irrigation. Higher amounts of irrigation and N significantly increased water use efficiency (WUE). Since optimal N rates for maximum grain yield was 250 kg ha-1 with 525 mm irrigation water ha-1 during both growing seasons, this may be considered in formulating good agricultural practices for the soil and weather conditions resembling those of this study.

Original languageEnglish
Pages (from-to)877-888
Number of pages12
JournalCrop Science
Volume55
Issue number2
DOIs
Publication statusPublished - 2015
Externally publishedYes

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