نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه زراعت دانشکده کشاورزی دانشگاه تربیت مدرس تهران ایران
2 گروه زراعت دانشکده کشاورزی، دانشگاه تربیت مدرس تهران ایران
3 گروه زراعت، دانشکده کشاورزی، دانشگاه تربیت مدرس، تهران ، ایران
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
This study was conducted to examine the interaction between cultivars and the nitrogen fertilizer applied to spring safflower growth and yield. It was performed as a factorial experiment within a randomized complete block design with three repetitions at the experimental field of the Faculty of Agriculture at Tarbiat Modares University during the 2021 crop season. The treatments included two safflower cultivars, Parnian and Goldasht, and six levels of pure nitrogen (0, 45, 90, 135, 180, and 225 kg/ha). The cultivar influenced the leaf area index and the number of capitula per unit area, while nitrogen fertilizer affected all traits significantly. The leaf area index was approximately 25% higher in the Parnian than the Goldasht cultivar. However, there was no significant difference in dry matter production between the cultivars. The highest leaf area index and dry matter were observed under 135 and 180 kilograms of nitrogen per hectare, respectively, and higher nitrogen did not result in significant increases. The highest number of capitula and seeds per capitula were obtained with 180 and 135 kg/ha, respectively, and further nitrogen did not significantly increase these traits. The increasing nitrogen enhanced seed and oil yield in safflower, with the highest significant yields obtained at the 180 kilograms per hectare of nitrogen. The number of capitula and seeds per capitula had a higher correlation with seed yield. Based on the results of this study, an increase in safflower yield can be expected with an increase in nitrogen fertilizer up to 180 kilograms per hectare.
کلیدواژه‌ها [English]
)