NUTRITIVE-VALUE, ORGANOLEPTIC QUALITY AND PRODUCTIVITY OF GREENHOUSE TOMATOES IN RELATION TO THEIR PRODUCTION METHODS - ORGANIC - CONVENTIONAL - HYDROPONIC

Different treatments of organic production of greenhouse tomatoes - ie organic conventional and hydroponic - were compared with respect to n utritive value, organoleptic quality and productivity. As concerns org anic production, the tomatoes cultivated in peat moss and shrimps comp ost contained higher amounts of Ca, Cu, Fe, P and Zn and had a later m aturity than those cultivated in cow manure compost. The average amoun t of total vitamin C of tomatoes produced conventionally and hydroponi cally was significantly higher than that of tomatoes produced organica lly whereas the mineral content of tomatoes had little relation to the method of production. The taste and texture of tomatoes and the total yield of fruits were comparable for the three methods of production e ven if a earlier precocity was obtained with the hydroponic culture.