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Effect of Osmotic and Water Priming on Yield and Yield Components of Two Rice Cultivars (Oryza sativa L.) in Dry Bed in Mazandaran Climatic Conditions
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Mohammad Khademi   , Faezeh Zaefarian * , Shahram Nazari , Mohammad Ali Esmaeeli |
| Associate Professor of Department of Agronomy, Sari Agricultural Sciences and Natural Resources University, Sari, Iran. |
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Abstract: (1564 Views) |
Seed priming technique (pretreatment)is one of the effective methods in rapid establishment and improvement of reproductive characteristic of rice under direct cultivation conditions. In order to investigate the effect of osmotic and water priming (osmopriming and hydropriming) on yield and yield components improvement of two rice cultivars, a factorial experiment was conducted in the research farm of Sari University of Agricultural Sciences and Natural Resources in a randomized complete blocks design with three replications in spring 2019. Experimental factors included two Tarom and Shiroudi cultivars and priming at five levels including hydropriming (24 hours), calcium chloride (osmotic potential of 1/25-Mega Pascal in 24 hours), potassium chloride (osmotic potential of 1/25-Mega Pascal in 24 hours), ascorbate acid (10 milligram per one liter water in 24 hours) and control (no priming). The results of the cultivar effect showed that the percentage of emergence with 88 and 78 and the rate of emergence with 0.2 and 0.15 per day were obtained in Shiroodi and Tarom cultivars, respectively. Also, the effect of priming on emergence rate was significant at one percent probability; so that the highest germination rate was obtained in priming with calcium chloride, potassium chloride and water, which increased by 50, 36 and 29 percent, respectively, compared to the control treatment. The highest rice plant height was obtained in Shiroudi cultivar under priming with calcium chloride, potassium chloride and water with 107, 104 and 103 centimeters, respectively. The results showed that the amount of chlorophyll index of different vegetation layers in all treatments of priming in Shiroodi cultivar was higher than Tarom cultivar. The highest grain and higher biological yields were obtained with 5513 and 13223 kilogram per hectare in Shiroodi cultivar, respectively. Priming with calcium chloride, potassium chloride, ascorbate and water increased grain yield by 19, 14, 10 and 14 percent, respectively, compared to the control treatment.
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| Keywords: Rice, Priming, Calcium chloride and Grain yield. |
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Full-Text [PDF 825 kb]
(1587 Downloads)
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Type of Study: Applicable |
Subject:
Crop Physiology
Received: 2021/02/25 | Accepted: 2021/03/30 | Published: 2021/03/30
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