Seyed Mehdi Mirbaqeri; Rouhollah Karimi; Mousa Rasouli
Abstract
In order to investigate the effect of foliar application of potassium sulfate (K2SO4; 0, 1.5 and 3 percent) and iron chelate (Fe-EDDHA; 0, 0.5 and 1 percent) on fruit set, fruit yield and quality, leaf mineral nutrient content, raisin yield and autumn and winter cold tolerance of ‘Bidaneh-Sefid’ ...
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In order to investigate the effect of foliar application of potassium sulfate (K2SO4; 0, 1.5 and 3 percent) and iron chelate (Fe-EDDHA; 0, 0.5 and 1 percent) on fruit set, fruit yield and quality, leaf mineral nutrient content, raisin yield and autumn and winter cold tolerance of ‘Bidaneh-Sefid’ grapevine, a factorial experiment was done based on randomized complete blocks design in a commercial vineyard in Bahareh village of Malayer city during 2016-17. The highest fruit set percentage and yield was achieved in 1.5 percent of K2SO4 in combination with 0.5 percent iron chelate. Berries K, Fe and Mn concentration had a positive and significant correlation with fruit yield per vine. Raisin yield was found to be highest in combined treatments of 1.5 percent K2SO4 and 1 percent Fe-EDDHA and the lowest raisin yield was related to control vines. The highest autumn cold hardiness was recorded in K2SO4 (3%) × Fe-EDDHA (1%) treated vines. However, the highest winter cold tolerance was achieved in K2SO4 (3%) × Fe-EDDHA (0.5%) treated vines. The lowest cold tolerance was observed in control vines. There was a positive and significant correlation between cold tolerance and K content and negative correlation with Mg concentration. Totally, the highest fruit and raisin yields and their desirable qualities were obtained with K2SO4 and Fe-EDDHA at moderate concentration. However, the highest buds cold tolerance was obtained with the combination of these fertilizers at higher doses.
Malihe Akrami Abarghoei; Abdolrahman Mohammadkhani; Gholamreza Rabiei
Abstract
In order to evaluate the effect of some bio-stimulators on yield and fruit quality of apricot cv. ‘Shekar pareh’ management functions were studied in the spring of 2014 in Abarkouh of Yazd province. The experiment was based on randomized complete blocks design with seven nutritional treatments ...
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In order to evaluate the effect of some bio-stimulators on yield and fruit quality of apricot cv. ‘Shekar pareh’ management functions were studied in the spring of 2014 in Abarkouh of Yazd province. The experiment was based on randomized complete blocks design with seven nutritional treatments included control (water spraying), humic acid one and two per thousand, aminol forte three and six per thousand and humi forte 0.5 and 1 per thousand in four replications. Bio stimulators were applied just spray twice during the growth period including two weeks after full bloom and a month after it. Results showed that the bio-stimulators effects significantly affected the measured traits except for the titratable acidity (based on malic acid), firmness and maturity index. Humic acid treatment reduced physical properties, total soluble solids and vitamin C. Aminol Forte with three per thousand concentrations increased most of the physical and chemical characteristics, but three per thousand to six per thousand concentrations had the effect of decreasing. Humi forte also increases fruit's carotenoid and vitamin C. Therefore, it seems that between treatments, aminol forte bio-stimulator enhanced yield and improve the quality of apricot fruit. Therefore, it can be recommended to spraing of aminol forte with three per thousand concentrations at the suitable time.
Mahboobeh Fizabadi; Zahra Ghahremani; Taher Barzegar; Ahmad Golchin
Abstract
Today, the production of healthy and high quality seedlings is the main factors of success in growing vegetables such as tomato. Hence, in order to investigate the effect of different levels of vermicompost and nitrogen on the growth parameters of tomato seedlings (Lycopersicon esculentum Mill. cv. Rio ...
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Today, the production of healthy and high quality seedlings is the main factors of success in growing vegetables such as tomato. Hence, in order to investigate the effect of different levels of vermicompost and nitrogen on the growth parameters of tomato seedlings (Lycopersicon esculentum Mill. cv. Rio Grande), a factorial experiment was conducted in a randomized complete design with three replications in 2014 at the research greenhouse of Department of Horticultural Science, University of Zanjan. Treatments consisted of five vermicompost levels (0, 5, 10, 20 and 40 wt %) and nitrogen at five levels (0, 25, 50, 100 and 200 mg N/kg soil). The results showed that nitrogen treatments caused a significant increase in seedling growth. The maximum seedling height, dry weight of root and stem, fresh weight of stem, leaf area and chlorophyll content was observed in 100 mg N/kg Soil. The vermicompost treatments significantly increased seedling growth, so the highest seedling height, internodes length, root and stem length, fresh and dry weight of root and leaf area was obtained in the 10 wt% vermicompost. Also vermicompost caused a significant decrease in growth period of transplant and the minimum period (39.6 days) was recorded in the 10 wt% vermicompost. According to the results the concentration of N. P and K in leaf increased with application of vermicompost. Application of 100 mg N/ kg soil and 10 wt% vermicompost improved seedling growth