EFFECT OF GIBBERELLIC ACID, KINETINE AND NPK FERTILIZER ON SEEDS GERMINATION AND APRICOT SEEDLINGS GROWTH

Abstract

Factorial experiment was carried out on the nurseries of the College of Agriculture and Forestry at University of Mosul /Iraq. During the growth period 2007 to study the impact of apricot seeds at soaking in three concentrations of gibberellic acid 0,500,100 mg GA3/l for 24 hors, fertilization with (NPK) fertilizers as solutions at three levels 0,100,200 mg NPK.L-1 and spraying the transplants with a mix of gibberellic acid and Kinitin 1:1: at three concentration levels of 0,150,300 mg.L-1 besides studying the interactions between the investigated factors. The results are briefed that soaking apricot seeds with 1000 mg GA3.L-1, fertilizing with NPK especially at the concentration 200 mg NPK.L-1 and Foliar spraying with the mix of gibberellic acid and Kinitin at 300 mg .L-1 resulted in a significant increase in the number of leaves ,leaf surface area, number of branches and concentration of chlorophyll and N,P,K elements in the leaves. For maximizing the growth of Apricot rootstocks , it is advised to the treatment of (1000 mg GA3 .L-1 + 200 mg NPK .L-1+300 mg (gibberellic acid : Kinitin .L-1) that led to an increase in number of leaves and concentration of NPK elements in the leaves.