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- Title
Improving grain yield and water use efficiency in maize by wick irrigation.
- Authors
Zarei, Zhaleh; Heidari, Hassan; Honarmand, Saeid Jalali; Bafkar, Ali
- Abstract
Limited water resources and successive droughts in Iran have limited crop production. Therefore, modern irrigation methods to increase water use efficiency can become more necessary. A 2-year (2020, 2021) field experiment was carried out to determine the effect of irrigation method and nitrogen fertilizer on maize physiological traits, grain yield, water use efficiency, and soil temperature and moisture. The experimental design was factorial in the randomized complete block with three replicates. The studied irrigation and fertilizer treatments were the four levels of irrigation (wick irrigation, surface irrigation with 50, 70, and 100% of plant water requirement) and the two levels of nitrogen fertilizer (50 and 100% of the recommended urea fertilizer). Totally, wick irrigation with 100% fertilizer increased SPAD, leaf relative water content, leaf porometer, total dry weight, ear dry weight, ear diameter, number of rows per ear, number of grains per ear, and 100-grain weight compared to other treatments. Wick irrigation significantly increased soil moisture and decreased soil temperature compared to surface irrigation with 50, 70, and 100% plant water requirement at a depth of 10 cm. Although there was no significant difference between wick irrigation and 100% surface irrigation regarding grain yield, on average, for both years, wick irrigation reduced water consumption by 57.88% compared to 100% surface irrigation. Furthermore, wick irrigation with 100% fertilizer had the highest water use efficiency. Therefore, wick irrigation with 50% fertilizer application is the best treatment, because water and fertilizer are saved.
- Subjects
IRAN; WATER efficiency; PLANT water requirements; CORN; NITROGEN fertilizers; IRRIGATION; IRRIGATION water; UREA as fertilizer; GRAIN yields
- Publication
Irrigation Science, 2024, Vol 42, Issue 4, p785
- ISSN
0342-7188
- Publication type
Article
- DOI
10.1007/s00271-023-00906-2