Determination of Allometric Relationships in two Basil Ecotypes as Affected by Organic Fertilizers

In order to determine the effects of organic fertilizers on morphological traits and yield of basil, an experiment was conducted as factorial experiment based on Completely Randomized Design with three replications under controlled conditions. Experimental factors were basil ecotypes (green and purple) and organic fertilizers (cow manure, vermicompost, sulfur granular compost and control. Results indicated that the highest plant height, fresh and dry weight of lateral branches, leaf number, leaf area, leaf fresh and dry weight and plant biomass were found in green basil when vermicompost was applied and the lowest means of these parameters were observed in control. Application of vermicompost, cow manure and sulfur granular compost caused (30, 29 and 28), and (61, 49 and 28%) increase in plant biomass in purple and green basil, respectively. Also, the fitted experimental allometric relationship indicated a significant relationship between average leaf number and average leaf area (r2=0.95). Allometric relationships between root and shoot dry weight also indicated more symmetric growth of these two parameters in green basil compared to the purple. Therefore, the analyze the growth relationships between plant components and production could be evaluated based on morphological components (leaf number, leaf area, root and shoot dry weight) and allometric equations.