EFFECT OF SPRAYING PUTRESCINE AND HUMIC ACID SPRAYING ON CHEMICAL PARAMETERS OF TOMATO PLANT LYCOPERSICON ESCULENTUM

Field experiment was conducted in An-Najaf governorate during spring of 2016. The aim of this experiment was to study the effect of different concentrations of putrescine 0, 50, 100 mg.L-1. and humic acid 0, 500 and 1000 mg.L-1 spraying on chemical parameters of tomato plant. The experiment included nine treatments, i.e. the interactions of three concentrations of putrescine (0, 50, 100 mg.L-1) and three concentrations of humic acid (0, 500 and 1000 mg.L-1). Sprays were applied twice during season at fifteen days interval that was done on forty-five days from cultivation. Factorial experiment within Randomized Complete Block Design (R. C. B. D.) was used with three replications. Means were compared according to Duncan's Multiple Range Test (D.M.R.T.) at probability of 0.05. Results can be summarized as follows: the use of different concentrations of putrescine with conc. 100 mg.L-1 and humic acid with conc. 1000 mg.L-1 had significant effects on most of the chemical parameters such as: N, P, K, total soluble carbohydrate and total Chlorophyll in Leaves and N, P, K, T.S.S and amount of vitamin C in fruit compared with control treatment which gave the least values for the above-mentioned parameters. The interactions between two factors (putrescine and humic acid) showed the presence of significant effects on most of the studied chemical parameters.