University of Tabriz Journal of Agricultural Science and Sustainable Production 2476-4310 35 4 2026 01 20 Effect of nitrogen levels and plant density on grain and oil yield of Camelina in Khuzestan Effect of nitrogen levels and plant density on grain and oil yield of Camelina in Khuzestan 33 44 21113 10.22034/saps.2024.61122.3203 FA Afsaneh Shojaei Dept. of Plant Production and Genetics Engineering, Agriculture Faculty, Agricultural Sciences and Natural Resources University of Khuzestan, Mollasani, Iran. Aydin Khodaei Joghan Dept. of Plant Production and Genetics Engineering, Agriculture Faculty, Agricultural Sciences and Natural Resources University of Khuzestan, Mollasani, Iran. 0000-0002-6074-7611 Sayed Ataolah Siadat Dept. of Plant Production and Genetics Engineering, Agriculture Faculty, Agricultural Sciences and Natural Resources University of Khuzestan, Mollasani, Iran. Danial Kahrizi Dept, Faculty of Agriculture, Tarbiat Modares University, Tehran, Tehran, Iran. Abdolali Gilani Dept, Khuzestan Agricultural and Natural Resources Research and Education Center, Agricultural Research Education and Extension Organization (AREEO), Ahwaz, Ahwaz, Iran. Journal Article 2024 04 06 Baclgrpimd and Objectives: Camelina is an oilseed plant that, in addition to food and medicinal uses, is also utilized in industry as biofuel and in cosmetics and personal care products. Compared to other oilseeds, it has low water, fertilizer, and pesticide requirements and can be incorporated into crop rotations with cereals. In camelina production, nutrient management and optimal planting density are key factors influencing growth and yield. Given the high potential for camelina cultivation in Khuzestan, this study was conducted to investigate the effects of different nitrogen fertilizer levels and plant density on grain yield and yield components of camelina in Khuzestan. Materials and Methods: The experiment was carried out as a split plot design based on randomized complete block design with four replications at the Behbahan agriculture research station during 2021-2022 growing season. Nitrogen was applied at five levels (0, 50, 100, 150, and 200 kg. ha-1 of pure nitrogen) in the main plots, and planting density was set at four levels (200, 400, 300, and 500 plants per square meter) in the sub-plots. The amount of nitrogen applied to each plot was calculated based on the specified treatments using urea as the source. One-third of the total amount was applied at the beginning of cultivation, and the remainder was applied in two stages. The dimensions of the plots were 1.5 × 2.5 meters, with a spacing of 1 meter between main plots and 2 meters between blocks. Each plot consisted of ten planting rows. Results: The highest grain yield (2442 kg. ha-1) and oil yield (857 kg. ha-1) were obtained with the application of 150 kg. ha-1 of nitrogen and 300 plants per square meter. at planting densities of 200 and 300 plants per square meter, with increasing nitrogen up to 150 kg.ha-1, the grain yield increased and then decreased, while in planting densities of 400 and 500 plants per square meter, the yield increased linearly with increasing nitrogen application. Conclusion: Applying nitrogen at rates up to 150 kg. ha⁻¹ led to an increase in Camelina grain yield. A density of 300 plants per square meter by provided favorable conditions for plant growth and development, will lead to increase grain and oil yield. Therefore, considering environmental conservation and resource management, a planting density of 300 plants per square meter and the application of 150 kg.ha-1 nitrogen can be utilized to achieve the highest grain and oil yields of camelina. Baclgrpimd and Objectives: Camelina is an oilseed plant that, in addition to food and medicinal uses, is also utilized in industry as biofuel and in cosmetics and personal care products. Compared to other oilseeds, it has low water, fertilizer, and pesticide requirements and can be incorporated into crop rotations with cereals. In camelina production, nutrient management and optimal planting density are key factors influencing growth and yield. Given the high potential for camelina cultivation in Khuzestan, this study was conducted to investigate the effects of different nitrogen fertilizer levels and plant density on grain yield and yield components of camelina in Khuzestan. Materials and Methods: The experiment was carried out as a split plot design based on randomized complete block design with four replications at the Behbahan agriculture research station during 2021-2022 growing season. Nitrogen was applied at five levels (0, 50, 100, 150, and 200 kg. ha-1 of pure nitrogen) in the main plots, and planting density was set at four levels (200, 400, 300, and 500 plants per square meter) in the sub-plots. The amount of nitrogen applied to each plot was calculated based on the specified treatments using urea as the source. One-third of the total amount was applied at the beginning of cultivation, and the remainder was applied in two stages. The dimensions of the plots were 1.5 × 2.5 meters, with a spacing of 1 meter between main plots and 2 meters between blocks. Each plot consisted of ten planting rows. Results: The highest grain yield (2442 kg. ha-1) and oil yield (857 kg. ha-1) were obtained with the application of 150 kg. ha-1 of nitrogen and 300 plants per square meter. at planting densities of 200 and 300 plants per square meter, with increasing nitrogen up to 150 kg.ha-1, the grain yield increased and then decreased, while in planting densities of 400 and 500 plants per square meter, the yield increased linearly with increasing nitrogen application. Conclusion: Applying nitrogen at rates up to 150 kg. ha⁻¹ led to an increase in Camelina grain yield. A density of 300 plants per square meter by provided favorable conditions for plant growth and development, will lead to increase grain and oil yield. Therefore, considering environmental conservation and resource management, a planting density of 300 plants per square meter and the application of 150 kg.ha-1 nitrogen can be utilized to achieve the highest grain and oil yields of camelina.

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