Document Type : Original Article
Authors
Hort. Dept., College of Agricultural Engineering Sciences/ Dohuk Univ
Abstract
The experiment was conducted during the fall of 2024 in Darato, southeast of Erbil, at a location with a latitude of 36°7'9.402"N, longitude of 44°4'2.922"E, and an altitude of 449 meters above sea level. The study aimed to evaluate the impact of three nitrogen fertilizer levels (150, 200, and 250 kg ha⁻¹) on forage yield and yield components of two maize hybrids (Zea mays L.): hybrid H1 (Jimson) and hybrid H2 (Safa). A factorial experiment was carried out using a randomized complete block design (RCBD) with three replications. The results presented that at N 150 kg ha-1, H2F1 produced the maximum total fresh yield (144.30 t ha-1) and number of rows per ear (13.8), whereas H2F3 produced the highest total dry yield (51.61 t ha-1) at nitrogen 250kg ha-1. Additionally, the maximum plant height and ear weight per plant were recorded by H1 at (167.68 cm and 61.01g) respectively. Nitrogen fertilizers vary greatly in terms of ear weight per plant; 150 kg ha-1 produced the maximum ear weight (63.64 g), whereas 200 kg ha-1 produced the highest ear length and 1000 kernel weight (24.66 cm and 391.33 g), respectively. More research may be done to find out how nitrogen treatments affect maize development, yield, and yield component at varying rates.
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