Tomato nutrition (fertilizing) on growth bags in greenhouse (II. effect on nutrient elements content of tomato leaves)
1985
Tsikalas, E.P. | Manios, I.V. (Ministry of Agriculture Heraklion Crete (Greece). Vine, Vegetable Crops and Floriculture Inst.)
In a factorial experiment arranged in a Randomized blocks design, the influence of manuring to tomatoes, cv Dombito, grown in growth bags under plastic was studied, for two successive years. Three levels of N, 50, 200 and 350 ppm, into irrigation water with the same levels of K in all possible combinations were tested. The rest nutrient elements were uniformaly applied according to Hoagland solutions in all treatments via irrigation system. The data obtained indicate that the nutrients content of tomato leaves are not consistent during the growing season. The N, P, K and Fe content of the leaves is generally higher the eighth week after transplanting. Later the content of the same elements in the leaves was decreased. The highest concentration of Mn on the leaves was n1024oted the 30th week after transplanting. The N and Mn content of the leaves was increased by 350 ppm N, while the highest P content was noted at 50 ppm N into irrigation water. The K content of tomato leaves is influenced by the N/K ratio. Iron content of the leaves was not affected by N and K. The highest yield was obtained with 200 ppm of N. Hence, the N and K content of the leaves at that level should be considered as opt
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