Faezeh Zaefarian; Mohammad Mehdi Mirzaei; Shiva Taheri
Abstract
In order to investigate the effect of pretreatment of seeds with organic fertilizers on germination and seedling indices of three cultivar of black cumin seed, a factorial experiment was conducted in the form of a completely randomized block design in four replications in 2021. The treatments of this ...
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In order to investigate the effect of pretreatment of seeds with organic fertilizers on germination and seedling indices of three cultivar of black cumin seed, a factorial experiment was conducted in the form of a completely randomized block design in four replications in 2021. The treatments of this experiment were cultivar in three levels (Iranian, Indian and Syrian) and seed pretreatment in three levels of organic fertilizers: humic acid, biozinc and control (without pretreatment). Characteristics of germination percentage and rate, germination uniformity, root, shoot and seedling length, fresh and dry weight of root, shoot and seedling, seedling tissue water content, seedling length vigour index and allometric coefficient were measured. The results showed that the studied treatments and their interaction had a significant effect on most of the measured traits. The maximum and minimum germination percentages (93.67% and 83.33%, respectively) were allocated to Iranian and Indian cultivars; while the maximum germination uniformity (256.79 hours) was obtained in the Syrian cultivar pretreated with humic acid and the minimum germination uniformity (134.40 hours) was obtained in both Iranian cultivar without pretreatment and the Iranian cultivar pretreated with biozinc. Also, the highest seedling length and seedling length vigour index were recorded in Iranian cultivars pretreated with humic acid (4.20 cm and 400.21), respectively, and the lowest ones (1.42 cm and 113.01) in Syrian cultivar pretreated with biozinc. In general, in the present study, the effect of seed pretreatment using humic acid as organic fertilizer was positive in many germination indexes.
Mohammad khademi; Faezeh Zaefarian; Shahram Nazari; Mohammad Ali Esmaelee
Abstract
In order to investigate the effect of hydropriming and osmopriming on the characteristics of experimental rice seedlings, the treatment was performed in a completely randomized design in three replications.Treatments included two rice cultivars (Tarom and Shiroudi) and priming at five levels including ...
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In order to investigate the effect of hydropriming and osmopriming on the characteristics of experimental rice seedlings, the treatment was performed in a completely randomized design in three replications.Treatments included two rice cultivars (Tarom and Shiroudi) and priming at five levels including calcium chloride and potassium chloride priming (Ψs -1.25 MPa), ascorbate acid (10 mg l-1), hydropriming (for 48 hours) and control (no priming). In this study, seedling characteristics were measured. Interaction of cultivar and priming showed that the highest germination percentage was observed in the range of 97-100% in Shiroudi and Tarom cultivars primed with calcium chloride and potassium chloride. The lowest germination percentage (85.33% and 77.33%, respectively) was obtained under control in Shiroudi and Tarom cultivars, respectively. The highest germination rate was obtained in priming with calcium chloride and potassium chloride, which increased the germination rate by 52 and 54%, respectively. The effect of cultivar and priming on root and shoot length as well as root and shoot dry weight were significant at 1% probability level. also, root and shoot length were 5.97 and 5.4 cm in Shiroudi and 4.01 and 4.59 cm in Tarom, respectively. The results showed that priming with calcium chloride, potassium chloride, ascorbic acid and water increased seedling length vigor indices 69, 64, 13 and 32% in Shiroudi and 91, 70, 47 and 43% in Tarom, respectively compared to control. Also, priming with calcium chloride, potassium chloride, ascorbic acid and water increased seedling weight vigor indices by 110, 95, 50 and 47%, respectively.
