CARACTERÍSTICAS PRODUTIVAS DE TOMATE CEREJA EM FUNÇÃO DA APLICAÇÃO DE FÓSFORO VIA SOLO E FERTIRRIGAÇÃO EM CULTIVO PROTEGIDO

Abstract

The dosage and the appropriate form of phosphorus application in the tomato culture can contribute to higher productivity and fruit quality. The present work aims to evaluate the effects of different dosages and forms of application of phosphorus (P2O5) in the cherry tomato culture under protected environment. The experiment was carried out in a protected environment in the experimental area of Olericultura of the Goiano Federal Institute - Campus Urutaí. The irrigation system used was drip irrigation in 12- liter pots. The statistical design employed was randomized blocks in a factorial scheme of type 2 (application forms) x 5 (P2O5 dosages) with five replicates and four plants per plot. The five dosages of P2O5 used were: 0, 250, 500, 750 and 1000 Mg ha-1 ; and the two forms of P application were, via soil and via fertigation. Attributes evaluated were: plant height (H), diameter of the stem (DS), number of branches per plant (NBP), relative index of chlorophyll (RIC), fresh root bulk (FR), root dry bulk (RDM), number of fruit per branch (NFB), total number of fruit per plant (TNF), cross-cut diameter (CD), longitudinal diameter of fruit (LDF), fresh fruit bulk (FFB), dry fruit bulk (DFB), productivity (Prod.), total soluble solids (TSS) and total titratable fruit acidity (ATTF). With the exception of RIC, TSS and ATTF, all vegetative and production attributes had a significant effect on the isolated factors and interaction. Fertigation showed better with increasing doses for H, DS, NBP, FR, RDM, CD, NFB, TNF and Prod. For the attributes of LDF, FFB and DFB, soil application was superior to that of fertigation. P in installments applied via fertigation provided higher productivity of cherry tomatoes.. The maximum economic efficiency dosage was achieved with 842.9 and 944.6 kg ha-1 of P2O5, for soil application and fertirrigation, respectively, increasing productivity by more than 700% under the conditions of the study