عنوان مقاله [English]
This experiment was performed to evaluate the effect of nitrogen source type and plant growth promoting bacteria on yield and its attributes of Talesh local garlic as split plot arrangement based on randomized complete block design with three replications in Rasht during the 2016-2017 cropping season. Three nitrogen sources of vermicompost (15 ton/ha), nitrogen (100 kg /ha), integrated utility of vermicompost (7.5 ton/ha) with nitrogen (50 kg /ha) as main plot and ten preparation of plant growth promoting including of non-inoculation (as check), Azospirillum brasilense, Azospirillum lipoferum, Pseudomonas putida, Pseudomonas fluorescens, Azotobacter, Azospirillum + Pseudomonas, Azospirillum + Azotobacter, Pseudomonas + Azotobacter, Azospirillum + Pseudomonas + Azotobacter as sub plot comprised experimental treatments. The greatest bulb yield was obtained under the usage of 100 kg nitrogen per hectare as urea fertilizer and simultaneous application of Pseudomonas and Azospirillum spp. There was a positive and significant correlation between bulb yield and all traits such as biological yield, bulb diameter, bulb height, clove numbers per bulb, clove weight, dry weight of bulb, dry weight of stem, leaf numbers per plant and plant height except bulb shell layers. Also, the correlation between yield attributes such as clove numbers per bulb, clove weight, bulb diameter, bulb height and vegetative characteristics of bulb plant was positive and significant. In general, bulb yield and its attributes showed different responses to nitrogen sources and plant growth promoting bacteria. Application of Azospirillum + Pseudomonas could be recommendable to improve bulb yield in conventional agriculture and under region climatic condition.
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