The Effect of Foliar Spraying With Some Growth Stimulants on Improving Vegetative Growth and Mineral Content of Seedlings of Navel Orange and Blood Orange

Abstract

This study was carried out in lath house of the Department of Horticulture and Landscape Engineering - College of Agriculture - Tikrit University, during the season 2020-2021, as a factorial experiment by spraying with three levels of the growth regulator Brassinolide (BL) which are 0.00, 0.015, 0.025 Mg.L−1 and spraying with nutrient solution PRO-SOL (M) at three concentrations of.000, 200,400. Mg.L−1 to determine the effect of the growth regulator Brassinolide and the nutrient solution PRO-SOL in increasing the chemical content of some nutrients for the two types of navel orange V1 and blood orange V2. The results showed that blood orange V2 was significantly superior to the cultivar Navel V1 in the leaf area amounted to 2991 cm2, the percentage of dry matter in the leaves was 35.39% and the percentage of mineral elements in the leaves was %N, 1.619 %K, 1.37%P, 0.204,. And the best concentration Of Brassinolide 0.025 Mg.L−1 with a concentration of PRO-SOL400 Mg.L−1 has increased the dry matter percentage, leaf area and chemical content of elements for the navel orange variety V1, and the concentration of Brassinolide 0.015 Mg.L−1 with a concentration of PRO-SOL 400 mg.L-1 has increased the dry matter percentage, leaf area and chemical content of elements for blood orange variety V2.