Document Type : Research Paper
Authors
1
MSc Graduated, Department of Agronomy and Plant Breeding, Astara Branch, Islamic Azad University, Astara, Iran
2
Assistant Professor, Department of Agronomy and Plant Breeding, Astara Branch, Islamic Azad University, Astara, Iran
3
Assistant Professor, Research Staff, Horticulture Crops Research Department, Ardabil Agricultural and Natural Resources Research Centre, AREEO, Ardabil, Iran
Abstract
Biofertilizers (biological fertilizers) contain a sufficient number of one or more species of beneficial soil microorganisms. These fertilizers are able to convert nutrients in the soil into nutrients such as vitamins and other minerals in a biological process and to the plant roots. Therefore, this experiment was conducted to investigate the effect of Fulzime biofertilizer containing growth-promoting bacteria on quantitative traits of potato hybrids of Savalan and Satina cultivars under water deficit stress based on a completely randomized factorial design with three replications in Zara Gostar Arta Company in 2017. The first factor was Folsium fertilizer (zero, 30 and 60g/l) and the second factor was polyethylene glycol (zero, -3 and -6 bar). Stress levels in terms of germination percentage, stem length, number of leaves per seedling, root length, number of microtubers per seedling, weight of microtubers per plant and fulzyme levels in terms of germination percentage, stem length, number of leaves per seedling, root length and number of microtubers per seedlings had significant differences. The interaction effect of water deficit stress and fulzyme was also significant in terms of germination percentage, number of leaves per seedling and microtubers weight per plant. Severe stress significantly reduced all traits under study compared to other levels. Root length and stem length had the highest values at the use of 30 and 60g/l fulzyme, respectively. In non-stress conditions without consuming fulzyme, under mild stress conditions 30g/l and in severe stress conditions 60g/l of fulzyme had the highest germination rate. The highest number of leaves per seedling under non-stress conditions was obtained with consumption of 30g/l of fulzium. The lowest microgranular weight per plant belonged to the treatment of not using Fulzime in non-stress conditions and zero to 60g/l Fulsium fertilizer in severe stress conditions. Based on the results, the application of 30g/l of fulzium is recommended to improve the quantitative traits in the production of potato microtubers.
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