Evaluation the effect of different levels of urea and ammonia fertilizers on growth and yield of Tomato (Lecopersicon esculentum c.v Calji)

In order to evaluation the effects of urea and ammonia fertilizers on growth and yield of Tomato c.v Calji, was conducted an experiment in completely randomized design with three replications. Each one of the nitrogen fertilizers was used in five concentrations consist 0, 50, 100, 150 and 200 mg/kg N soil. The evaluated characteristics were consisting fruit number, yield of one plant, vitamin C, total acid, TSS, plant height, day to flowering, fresh weight and chlorophyll index. Results indicated that the highest fruit number was observed in urea 100 and 150 mg/kg N and the lowest in control treatment. The greatest yield was relative to urea 150 mg/kg N and the least in ammonia 150 mg/kg N treatment. In most evaluated traits, application of urea 100 and 150 mg/kg N was better than ammonia. Thus, application of low levels of ammonia can be improved quantitative and qualitative characteristics of plant and fruit of tomato but its high levels had badness effects on plants. Based obtained results from this study can be concluded that urea and ammonia fertilizers are more effective on vegetative factors than generative factors and will have desirable influences on vegetative growth of tomato.