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Simulating growth and drought stress indices of rapeseed cultivars in Lorestan province
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Mozhgan Sadeghi   , Sajjad Rahimi-Moghaddam * , Esmaeil Mohammadi-Ahmadmahmoudi , Khosro Azizi |
| Lorestan University & Faculty of Agriculture |
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Abstract: (101 Views) |
Rapeseed is the third most important oilseed product after soybean and oil palm in the world. Evaluating the growth and drought indices of different cultivars can help introduce the optimal cultivar for a given region to achieve optimal production. The current research was conducted in four counties of Lorestan province including Aleshtar, Khorramabad, Kuhdasht, and Pol-e Dokhtar for simulating the growth and drought indices of three rapeseed cultivars (Hyola308, Hyola401, and RGS003) using modeling technique. APSIM model was used to simulate the growth and yield of rapeseed. On average across all counties, Hyola401 had the maximum LAI (4.7), CGR (21.1 g m-2 day-1), RGR (0.8 g g-1), and TDW (1507.4 g m-2 day-1). Grain yield varied from 21.1 tons ha-1 in Aleshtar to 4.8 tons ha-1 in Pol-e Dokhtar. Also, on average across various counties, the average grain yield for Hyola308, Hyola401, and RGS003 cultivars was 3.9, 4.5, and 4 tons ha-1, respectively. For the water stress factor (WSF), water stress was not observed in Aleshtar, but in other counties, water stress started after the flowering stage and lasted until the maturity stage. The drought pattern indicated that in most counties, except Aleshtar, suitable irrigation management at the end of the rapeseed growth period can help to improve grain yield in the studied counties.
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| Keywords: Grain yield, Leaf area index, Relative growth rate, and Water stress index. |
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Full-Text [PDF 970 kb]
(67 Downloads)
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Type of Study: Research |
Subject:
Crop Physiology
Received: 2024/08/24 | Accepted: 2024/11/30 | Published: 2024/11/30
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