Caballero, R; Vento, M; Chaveli, P; Font, L; RodrÃguez, D
Substrate of organoponics are subjected to an intensive exploitation, for what is important to achieve a good handling in their organic fertilization; with the objective of achieving more precision when to carry out this fertilization and to obtain sustained increments of the yields, without the substrate it was carried out a study was deteriorate in three organoponics, where the external critical levels of P2O5, K20 and organic matter were determined; In the other hand they were also evaluated the combined effects of dose of compost of manure vacuno (0, 5, 10 and 15 kg.m-2), applied in three moments (to the beginning, alternamente and in each cultivation) in a vegetable sequence, during three years; the experiments was realized of a block design at random with factorial arrangement and three repetitions. Taking samplings in the substrate, to the beginning and at the end, of each cultivation cycle, the pH (H20), P 205, K20 and the percent of organic matter were determined, and the critical limits were obtained: P205 (10.00 mg.100g-1), K20 (11.00 mg.100-1) and M.O (17.00%); when these values are for under, it should be applied 5 kg.m -2 of bovine manure composted each two cultivations, to achieve yields above 40.0 kg.m-2 of vegetables, ciclo-1, if the values were superior, it is not necessary applied.