نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه زراعت و اصلاح نباتات، دانشکده کشاورزی، دانشگاه ایلام، ایلام، ایران
2 سازمان جهاد کشاورزی استان لرستان، خرمآباد، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
This study aimed to evaluate the effects of planting bed, nitrogen levels, and barley cultivars on the agronomic traits and yield of rainfed barley under the climatic conditions of Dareh Shahr County during the 2023–2024 growing season. The experiment was conducted as a split-split plot based on a randomized complete block design with three replications. Treatments included the planting bed as the main factor at two levels: conventional (planting on 23 November 2023) and stale seedbed (planting on 13 December 2023). The sub-factor consisted of rainfed barley cultivars at three levels (Nader, Khorram, and Mahour), while nitrogen fertilizer was the sub-sub factor at four levels (0, 50, 75, and 100 kg ha⁻¹), applied at planting and tillering stages. Results revealed that the simple effects of planting bed, cultivar, and nitrogen were significant for grain yield. The interactions between planting bed × cultivar and planting bed × cultivar × nitrogen were also significant for 1000-grain weight and the number of grains per spike. The highest grain yield (2169 kg ha⁻¹) was achieved in the stale seedbed with 75 kg N ha⁻¹, whereas the lowest (1696 kg ha⁻¹) occurred in the control. In the conventional bed, 75 kg N ha⁻¹ produced 2051 kg ha⁻¹, representing a 20.2% increase over the unfertilized control. Among cultivars, Mahour (1984 kg ha⁻¹) outperformed Nader and Khorram. The highest grain protein content (8.43%) was recorded for Nader with 75 kg N ha⁻¹.
کلیدواژهها [English]
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