Effect of budding, soil fertilization and spraying solution of humic acid on growth of Apricot seedlings and leaves mineral content of N,P, K

Abstract

The experiment was carried out in the Experimental Field of Al-Mahawell Station during the period 2015 - 2016 to find out the effect of two cultivars of apricot (Kaisy and Zaghenia) budded on apricot seedlings root stocks , the second factor was studied the influence of , soil fertilization with humic acid ( 0 , 3 , 6) gr . L-1, The third factor was studied spraying seedlings for three levels of humic acid (0 , 2 , 4) ml . L-1, Two hundred and seventy seedlings were studied of one year old rootstocks of apricot for budding on 4 Sept. 2015 . Afactorial experiment within CRD with 3 Replications was adapted,results could be summarized as follow:- 1-The cultivars gave asignificant effect on most vegetative growth parameters . Kaisy cultivar gave higher means of budding success percentage ,Shoot length , Shoot girth ,Shoot number , leaves number, leaf area , vegetative dry weight and leaf content of N , P , K compared with Zaghenia cultivar .2- Adding humic acid 6 gr . L-1 to soil gave a significant increase of all vegetative growth and the content of leaves for chlorophyll and and N,P,K compare with other treatments .3-Treating Apricot seedling with high concentration of nutrient solution humic acid at 4 mg . L-1 a gave a significant increase in all vegetative growth parameters and nutrient elements in leaves compared with the other treatments as 2 mg .L-1 of Grow green and control treatment .4-The interaction between cultivars and humic acid or foliar nutrition with humic acid treatment gave a significant effect for most the vegetative growth parameters studied and the nutrient elements in leaves N , P , K .5-The interaction between kaisy cultivars , and adding humic acid to soil or spraying gave a the highest values of most studied parameters