Mehdi Ramezani; Reza Rezaei Sokht Abandani
Abstract
To study the effects of priming on seed germination traits of sainfoin 'Eski', a factorial in randomized complete block design with three replications was conducted at the laboratory of agricultural research center of Sari in 2011. Treatments consisted of polyethylene glycol (PEG6000) at 5 and 10%, potassium ...
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To study the effects of priming on seed germination traits of sainfoin 'Eski', a factorial in randomized complete block design with three replications was conducted at the laboratory of agricultural research center of Sari in 2011. Treatments consisted of polyethylene glycol (PEG6000) at 5 and 10%, potassium nitrate (KNO3) at 5 and 10% and potassium chloride (KCl) at 5 and 10% levels and 6, 12 and 24 hours of treatment duration. The most significant interaction of time × priming vigor, root length and germination rate was achieved by priming solution containing PEG 10% for 12 hours. The highest germination percentage and total number of seedlings was achieved by 5 and 10% PEG for 6 and 12 hours and the least with a solution of KCl 10% for 6 hours, respectively. The highest shoot length and seedling length was obtained at PEG 10% for 12 hours and the least at KCl 10% for 24 hours. The highest and lowest number of normal seedlings, were observed by a solution of PEG 10% for 12 hours and KCl 10% for 24 hours, respectively. The highest R/S ratio was obtained in a solution of PEG 5% for 6 hours and the lowest ratio was observed in the solution of KNO3 10%. The lowest weight ratio of R/S was obtained in a solution of KNO3 and KCl 10% for 6 and 24 hours and the highest dry weight of R/S in priming with PEG 10% for 12 hours.
Mehdi Ramezani; Reza Rezaei Sokht Abandani
Abstract
To determine the effects of priming and planting density on improvement of morphological and physiological traits of the two hybrid corns SC (S.C. 704) under double cropping in Sari, a split plot experiment as randomized complete block design with four replications was conducted in 2010. Treatments included ...
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To determine the effects of priming and planting density on improvement of morphological and physiological traits of the two hybrid corns SC (S.C. 704) under double cropping in Sari, a split plot experiment as randomized complete block design with four replications was conducted in 2010. Treatments included two densities of 80 and 100 thousand plants per hectare as the first factor and osmopriming of seeds of two hybrids of corn (S.C. 704), with a solution of 10% polyethylene glycol (6000 PEG), 0.5% potassium nitrate (KNO3), 2% potassium chloride (KCl), water (hydropriming) and control (without priming) were considered as the second factor. The results showed that plant height using the priming solution of 10% polyethylene glycol and 100 thousand plants per hectare density was 33 percent higher than 0.5% potassium nitrate and 2% potassium chloride with the density of 80 thousand plants per ha. Also the forage yield per hectare with the density of 100 thousand plants was 14.42% more than 80 thousand density. Best plant density and priming concentration for leaf area index (LAI), crop growth rate (CGR) and net assimilation rate (NAR) were the density of 80 thousand plants per hectare and 10% polyethylene glycol. Therefore, it is concluded that adequate forage yield (54730 kg/ha) of the hybrid corn used in this study were obtained by the density of 100 thousand plants per hectare and 10% polyethylene glycol solution.
Davood Akbari Nodehi; Hassan Khademi Shormasty; Ali Cherati Araei; Fazl Shirdel Shahmiri; Reza Rezaei Sokht Abandani; Nadia Fahimi borkhali
Abstract
To investigate the effects of deficit irrigation and different levels of nitrogen fertilizer on somequantitative and qualitative properties of Melissa, a pot experiment was conducted for one year (2011) inMazandaran province. Experiment was carried out as a factorial based on randomized complete blockdesign ...
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To investigate the effects of deficit irrigation and different levels of nitrogen fertilizer on somequantitative and qualitative properties of Melissa, a pot experiment was conducted for one year (2011) inMazandaran province. Experiment was carried out as a factorial based on randomized complete blockdesign with three replications. Irrigation treatments (25, 52 and 75 percent field capacity, FC) andnitrogen fertilizer (0 and 2.5 percent ammonium nitrate) were allocated to main and sub-plots,respectively. The results showed that the effect of different levels of deficit irrigation were significant onquantitative and qualitative properties of Melissa. Fertilizer treatments were significant on dry weight,leaf area, shoot number and fresh weight, percent citronellal, caryophyllene oxide percent, geranial andneral percent. Interaction of treatments was significant only on leaf number, dry weight of shoot, freshweight of plant and geranial percent. Results showed that maximum plant height, leaf area, number ofstems, number of leaves and dry and fresh weight was obtained in 75 percent FC treatment. Percent ofcitronellal, caryophyllene oxide, geranial and neral with 6.14 percent, 11.61 percent, 20.09 percent and17.38 percent, respectively, had a maximum amounts in 75 percent FC treatment. Also, application ofnitrogen fertilizer caused 5.33 and 9.15 percent reduction of citronellal and caryophyllene oxiderespectively and increased geranial and neral percent by 17.64 and 15.56, respectively.