Mohammad Khademi; Faezeh Zaefarian; Shahram Nazari; Mohammad Ali Esmaeili
Abstract
To investigate the effect of seed priming on emergence characteristics, root morphological growth, and phenological trends of rice in direct seeding, an experiment has been conducted in Sari Agricultural Sciences and Natural Resources University within 2019. The study is conducted as factorial in a randomized ...
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To investigate the effect of seed priming on emergence characteristics, root morphological growth, and phenological trends of rice in direct seeding, an experiment has been conducted in Sari Agricultural Sciences and Natural Resources University within 2019. The study is conducted as factorial in a randomized complete block design with three replications. The factors include Tarom Hashemi and Shiroudi cultivars and priming at five levels, namely hydropriming (for 48 hours), calcium chloride, and potassium chloride priming (Ψs -1.25 MPa), ascorbate acid (10 mg l-1), and control (no priming). The effect of priming on emergence percentage shows that the highest amount of this trait belongs to 90% in priming with calcium chloride, which is not significantly different from priming with potassium chloride and water. The rate of emergence of priming with calcium chloride, potassium chloride, and water has increased by 50%, 36%, and 29%, respectively. Results show that priming with calcium chloride, potassium chloride, ascorbate acid, and water has increased by 55%, 50%, 33%, and 38% of the plant height and by 48%, 29%, 12%, and 25% of plant dry weight, respectively. In Shiroudi and Tarom Hashemi cultivars, the time required for the onset of tillering has been 27.40 and 24.53 days; panicle appearance, 90.4 and 53.87 days; flowering, 100.53 and 70.87 days; and maturity 132.26 and 94.61 days, respectively. The least time required for panicle appearance and flowering is observed in priming with calcium chloride, although this has not been significantly different from other priming, and decreased by 11.17 and 7.5 days to the control, respectively.
Mohammad Yazdani; Hemmatollah Pirdashti; MOhammad ALi Esmaeili; MOhammad ALi Bahmanyar
Volume 11, Issue 2 , November 2009, , Pages 83-92
Abstract
In order to investigate the residual effect of different tobacco cultivars on germination and seedling growth of rapeseed, an experiment was conducted at laboratory and glasshouse during 2007 as factorial based on completely randomized design with four replications. Extracts of root and shoot from two ...
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In order to investigate the residual effect of different tobacco cultivars on germination and seedling growth of rapeseed, an experiment was conducted at laboratory and glasshouse during 2007 as factorial based on completely randomized design with four replications. Extracts of root and shoot from two different types of tobacco (Virginia and Basma) and different concentrations of extracts (0, 40 and 80%) were the treatments. Results showed that germination percentage and rate, shoot and root length in rapeseed (Hayola 401) in laboratory experiment and root and shoot length and ratio, shoot to root dry weight ratio, leaf area, seedling emergence and vigor and chlorophyll contents were significantly affected by different tobacco root and shoot extracts. According to results root extract of Virginia and shoot extract of Basma had the highest and the lowest effect in terms of mentioned traits, respectively. Among studied characters, germination rate had highly correlation with germination percentage and seedling vigor.