EFFECT OF PHOSPHATE FERTILIZER ON THE CHEMICAL OF THE SEEDLINGS OLEA EUROPAEA L. OF OLIVES GROWN IN GYPSON SOILS

Abstract

The experiment was conducted in the orchard of the Department of Horticulture and landscape - College of Agriculture - University of Tikrit in season of 2018 to study the effect of the addition of phosphate fertilizer on the characteristics of vegetative growth and the chemical content of the seedlings of three varieties of olives. The experiment includes the study of the effect of two factors, the first is the phosphate fertilizer Di Amino Phosphate (DAP) It has an F symbol with four levels: 0, 75, 150, 225 g. and the second was the V symbol, where three varieties of olives were used: Nepali, Ashrassi and Khadiri. The experiment is carried out according to the design of the complete random block (RCBD) with three replicates. The data were statistically analyzed and compared with the Duncan test 5% probability. The most important results can be summarized as follows: The results of the study showed that fertilizing treatment 225 gm seedlings-1 significantly affected the characteristic percentage of nitrogen, phosphorus, potassium and carbohydrates in leaves and branches and reached 1.34, 0.79, 0.93, 6.39, 5.14%, respectively, compared to the comparison treatment and did not differ significantly. In the leaf content of
chlorophyll with the rest of the levels. The cultivars had a significant effect, as the two varieties were the Khadiri Ashersi cultivars over the Nepali variety in terms of the percentage of nitrogen in the leaves, which amounted to 1.30, 1.31%, respectively, while the Nepali and Ashrassi cultivars exceeded the Khadiri variety in The percentage of potassium in the leaves was 0.88, 0.% in succession, and the Nepalese cultivar outperformed the other two cultivars in the percentage of carbohydrates in the leaves and branches amounted to 5.27, 4.41%. And the interference between the fertilizer level gave 225 g. Seedlings -1 The Nepali cultivar showed a significant increase in the characteristic of each percentage of phosphorus in the leaves, which amounted to 0.80% and the percentage of carbohydrates in the leaves and branches 7.16 and 5.94%, respectively, and gave fertilization overlapping at 225 g. Seedlings-1 The cultivar has significantly increased the percentage of nitrogen and potassium in the leaves of 1.51 and 0.97%, respectively.