ISHS Acta Horticulturae 133: Nutrient Film Technique and Substrates, XXI IHC
BIOLOGICAL EFFECT OF GREENHOUSE TOMATOES GROWN ON ROCKWOOL |
| Authors: | H. Simitchiev, V. Kanazirska, I. Popov, N. Atanasov |
| Abstract:
The quality of tomato fruits grown on soil and on rockwool is compared. It has been established that the contents of dry matter, acids and sugars is not changed depending on the method of cultivation, and the differences in the ascorbic acid contents, and the mineral composition (N, P, K, Ca, Mg) are insignificant. The biological effect of tomato fruits has been investigated on two groups of experimental animals, albino rats and guinea pigs, which took the food for 28 days. Disturbances in growth, development and behaviour of the animals were not observed. Aberrations of the functions of the liver and kidneys were not established. The water-salt exchange was not upset. The quantity of electrolytes (K, Na, Cl, Ca and P) in the blood serum and the hematocrit value of the blood are within the normal range. The method of tomato cultivation does not impart them characters which to cause changes in serum iron and serum copper. | |
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