Study of the effects of mycorrhiza, fulvic acid, seaweed extract and urea on physiological traits and leaf yield of tobacco (Burley 21)

Abstract

To study the effects of mycorrhiza, fulvic acid, seaweed extract and urea on the physiological traits and leaf yield of tobacco, an experiment was carried out in split plots in a randomized complete block design with three replicates at Marivan during 2015. In this study, the main factor was two levels of inoculation with mycorrhiza including: control: no inoculation and inoculation with mycorrhiza (Glomusinteraradices) and subplots treated with growth stimulants at 5 kinds: control-distilled water, fulvic acid, seaweed extract, urea, fulvic acid + seaweed extract + urea. The results indicate that the number of leaves and dry weight of the middle leaves of plants inoculated with mycorrhiza were increased significantly. In addition, the foliar application of growth stimulants significantly affected the relative water content, fresh and dry weight of the lower and middle leaves and also the greenness and fresh weight of the upper leaves of tobacco.