Abstract
This research was conducted out Nenava research station during 2001-2002 season to study the effect of four levels of nitrogen fertilizer (0, 10, 20 and 30kg N/donum (2500 m2)) and four concentrations of kinetin (0, 50, 100 and 150 ppm) and their interaction on the growth of one year old of apple (Malus communis L.) seedlings. A factorial experiment with three replications was carried out in a randomized complete block design (RCBD), each replicate was consist of (30) seedlings. Data Obtained of this research was tested by using Duncan Multiple range test at 5% level, the important results of this study could be summarized as following: The addition of the nitrogen fertilizer caused significant increases in all the characters for the vegetative growth of the apple seedlings stem length, stem diameters, dry weight of vegetative growth. Also dry weight of roots and the contents of nitrogen in leaves, total chlorophyll content in leaves. The addition of the kinetin treatments revealed significant increases in dry weight of the vegetative growth, dry weight of roots in apple seedlings and nitrogen content in the leaves, total chlorophyll content, but there is no significant increase stem length, stem diameter. The interaction between nitrogen and kinetin affected significantly in most of the characters of the vegetative growth, dry weight of roots, nitrogen content in leaves, total chlorophyll content in apple seedlings. The best treatments in apple was 20kg N/donum + 50 mg/L kinetin in stem length, 20kg N/donum + 100 mg/L kinetin in stem diameter, 30Kg N/donum + 100 mg/L kinetin for dry weight vegetative growth dry weight of roots, nitrogen content in leaves, total chrophyll content.
