Effect of Bio and Organic fertilization on the Vegetative Growth of Local Orange Seedlings(Citrus sinensis L. Osbeck)grafted on Sour Orange RootStock

Abstract

The study was carried out in certified nursery for Citrus production at Al-Hindya Town in Kerbala Governorate during period of 1/3/2017 until 1/12/2017, on 6 months age of Local orange seedlings. Bio fertilization (EMI) of four concentrations i.e. (0, 10, 15, and 20) ml.L-1 and Organic fertilization (Humic Acid) of four concentrations i.e. (0, 3, 4, and 5) ml.L-1 and their interaction on vegetative growth were studed. The experiment was conducted as a factorial experiment with in , Randomized Complete Block Design (R.C.B.D.) with three replicates, significant difference (LSD) was calculated for the significant data at 0.05 to compare the means of treatments. Results showed that spraying with Organic fertilization, Biofertilization (EMI) or interaction increased significantly all studied characteristics included plant height, the diameter of stem stalk, number of branches, number of leaves fresh and dry weight of vegetative growth. The results revealed that the interaction between Humic Acid at 5 ml.L-1 + Biofertilization (EMI) at20 ml.L-1 concentrations increased significantly all the studied characteristics which gave the highest; plant height (59.67 cm), the diameter of stem stalk (1.990 cm), number of branches (9.30 branches.seedling-1), number of leaves (98.00 leaves. seedling -1), fresh weight of vegetative growth (75.90 g. seedling-1), dry weight of vegetative growth (33.09 g. seedling -1), fresh weight of root growth (40.43 g. seedling -1) and dry weight of vegetative growth (16.60 g. seedling-1), as compared with the control treatment.