While mineral fertilization enhances production costs and contributes to the depletion of nonrenewable natural resources, the application of industrial byproducts can be a suitable alternative for crop fertilization. In this sense, the aim of this work was to evaluate the effect of the application of potato bioproduct over productive, morphological and quality characteristics of tomato fruits cultivated in plastic tunnel and in field during spring-summer and autumn-winter seasons. Two experiments were carried out in plastic tunnel and one in field, both in a randomized block design with three replications in a factorial with two intervals of application of potato bioproduct (after all harvests and in alternate harvests) and four levels (1, 2, 3 or 4 L ha-1). In addition, were used four additional controls: (T1) mineral fertilization in coverage; (T2) mineral fertilization in coverage plus 50 L ha-1 of potato bioproduct applied at 30 and 60 days after transplant; (T3) 100 L ha-1 of potato bioproduct applied at every 15 days and; (T4) mineral fertilization in coverage plus 0.5 L ha-1 of potato bioproduct applied after every harvest. We measured mass, number, length and width of fruits, the number of deformed fruits, with open locule, blossom-end rot and radial crack. In the spring-summer, the potato bioproduct does not alter the mass, the number, the length and width of fruits of tomato, while, in the autumn-winter, it reduces the mass, the length and the width of fruits. In the spring-summer and autumn-winter, the potato bioproduct does not alter the number of deformed fruits, with open locule, blossom-end rot and radial crack. Thereby, the application of potato bioproduct in the levels and forms proposed in this study is not recommended for tomato crop.
Solanum lycopersicum; nutrition; mineral fertilization
