Effect of Phosphorus and Polyamine Fertilizers on Leaves N, P, K, Chlorophyll, Protein and Carbohydrates Concentrations of Kufi Apple Transplants

Abstract

Abstract The work was conducted in the Lath-house/Department of Horticulture and landscape design/College of Agriculture and Forestry/University of Mosul on Kufi apple transplants (Malus domestica L.) at one year old planted on plastic containers containing 9 kg of soil, by using Randomized Complete Block Design (RCBD) with two factors, three replications and four transplants for every experimental unit, First factor was three levels of phosphorus (0,100 and 200 mg P kg soil), second factor was three levels of polyamine fertilizer (0,1.5 and 3 gm l−1) the transplants were fertilized with phosphorus once during a season, first application was done in 26/4/2021, while Polyamine fertilizer was applied five times during the season, 20 days between them, first application was done in 26/4/2021. The results obtained showed that the application of phosphorus especially at a concentration of 200 mg P kg−1 soil and polyamine fertilizer at the concentration of 3 gm l−1, each separately or in combination, significantly increased leaves N, P, K, total chlorophyll, protein and carbohydrates concentrations of Kufi apple transplants compared to the control treatment.