ONE, concime completo per la lattuga coltivata in orti famigliari e urbani

The cultivation of vegetables in the garden or on the balcony for own production is often performed as hobby from persons without any agricultural knowledge. Therefore the good agricultural practies are not followed. The most part of the growing practices are approximate, in particular fertilization. In this work a complete fertilizer has been evaluated for providing the mineral nutrients required from vegetables and stimulate the nutrient use efficiency. The product tested is ONE® commercialized from Valagro S.p.A. compared with control fertilized with the minimum lettuce requirements and solutions having the same concentrations of macro-nutrients present in ONE®. In order to separate the nutritional effect from the biostimulant effects. Results showed that ONE treatments were able to speed up the growing rate of plants and these reached the commercial maturity earlier than other treatments. The yield in ONE® treatments were higher reaching 320 g/plant or 3 kg/m2 compared to 141 g/plant or 1.3 kg/m2 of the control. The chlorophyll content was higher in ONE treatments having a positive effect on the visual appearance of the vegetables. The nitrate content was very low below 500 mg/kg FW, much lower than the commercialization law limits. The sucrose content was higher in outer leaves compared the inner leaves, while opposite results were found for total sugars. In conclusion considering the yield and quality parameters the ONE at the 50% of the dose suggested on the label gave the best results in Iceberg lettuce.