Effect of Interaction among N Forms and Calcium Sources on Quality and Chemical Composition of Tomato(Lycopersicon esculentum) | ||||
| Egyptian Journal of Soil Science | ||||
| Article 6, Volume 57, Issue 1, March 2017, Page 61-71 PDF (497.24 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejss.2017.3592 | ||||
 View on SCiNiTO | ||||
| Abstract | ||||
| A field experiment was conducted at the Experimental Farm of the Faculty of Agric. El-Mansoura Univ. During season of 2013 to evaluate the effect of N-fertilization forms and different sources of calcium on chemical constitutes of tomato plant and its quality (Lycopersicon esculentum) "Carmen varaity". Twelve treatments were arranged in split block design with 3 replicates, which were the simple possible combination between three forms of nitrogen fertilizers [ammonium sulfate, ammonium nitrate and urea] as main plots, and four sources of calcium (control, calcium chloride, calcium sulfate and calcium nitrate) as sub plots. Thus the total number of plots used for the season was 36 plots. The results showed that; soil application of N-forms; ammonium sulfate, ammonium nitrate and urea significantly affected the average values of chlorophyll (a, b and total, mg.g-1), N, P, K and Ca% in the leaves and tomato quality of fruits such as N, P, K andCa%, V.C, total carbohydrates, lycobien , nitrate, acidity and TSS. Except for nitrate and acidity contentsthe highest mean valuewas recorded for the plants treated with ammonium sulfate,while such effect for nitrate and acidity contents were recorded for the treatments of ammonium nitrate and urea, respectivelyexcept for acidity values. Also, the results, indicated that the mean values of all mentioned parameters were significantly increased with using different sources of calcium; calcium nitrate, calcium chloride and calcium sulfate comparing with the untreated plants, and the highest values were recorded with using calcium nitrate as a source of calcium.On the contrary of this trend, the average values of acidity were significantly decreased under any source of calcium addition and recorded the highest value for the untreated plants. Generally, the most suitable treatment which realized the highest safe yield for tomato fruits was connected with the treatment of ammonium sulfate + Ca2NO3. | ||||
| Keywords | ||||
| N-forms; Ca sources; tomato plant; Quality | ||||
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