Simulating Grain Yield and Water Use Efficiency of Autumn Rapeseed Using APSIM-canola Model in Lorestan Province
Author(s):
Article Type:
Research/Original Article (دارای رتبه معتبر)
Abstract:
In recent years, enhancing crop grain yield and water use efficiency have become among the important objectives of researchers. Therefore, this study was conducted to identify the optimal combination of cultivar and irrigation in autumn rapeseed. To do this, the current research was carried out using APSIM simulation model on three autumn rapeseed cultivars (Hyola308, Hyola401, and RGS003) and four irrigation treatments (full irrigation, withholding irrigation at flowering stage, withholding irrigation at pod initiation stage, and withholding irrigation at grain filling period) in four counties of Lorestan Province. The results showed that the highest grain yield in Khorramabad, Pol-e Dokhtar, and Kuhdasht was obtained with Hyola401 cultivar and full irrigation (5361, 5378, and 4488 kg.ha-1, respectively), while in Aleshtar, cultivation of Hyola308 cultivar and withholding irrigation in one of the treatments led to the highest yield (2634 kg.ha-1). The results also showed that Hyola401 cultivar and withholding irrigation at flowering stage in Pol-e Dokhtar and Khorramabad and full irrigation in Kuhdasht (0.457, 0.398, and 0.307 kg.m-3, respectively) led to the highest crop water use efficiency in these counties. In Aleshtar, Hyola308 cultivar and withholding irrigation at flowering stage resulted in the highest crop water use efficiency (0.239 kg.m-3). Overall, the results showed that for these rapeseed agro-ecosystems, the air temperature in each county played a key role in choosing the optimal cultivar (i.e. cultivars with higher percentage of fertile pods under water stress conditions) and proper irrigation management.
Keywords:
Language:
Persian
Published:
Journal of Water Research in Agriculture, Volume:38 Issue: 3, 2024
Pages:
257 to 278
https://www.magiran.com/p2802648
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