Avaliação de doses e fontes de fosfatos parcialmente e totalmente acidulados na produção do arroz de terras altas no segundo ano de cultivo

Abstract

The goal is to evaluate the residual effect of different types of phosphates fertilizers, in different measures, applied at soils on the Cerrado, on the rice of high lands in the second year of cultivation. The experiment was installed in outline entirely by chance, in factorial scheme 6x3 with three replicates, being six measures of Phosphor (P) and thee sources of P. The selected grow crops was the “BRS Sertaneja”, where it was sown in the same vessels of 3dm³ succession to the experiment of the first year (completed). At the end of the experimental period, referring to the 112 days, analyzed the residual effect of phosphate fertilizers (Triple Superphosphate, Catalão Phosphate and Multifós Phosphate) and six measures applied in previous cultivation (0, 25, 100, 150 e 200 mg dm-³) and how they influenced the dry mass on the part of the area, the dry mass of roots and the grain productivity in the cultivation in the second year. The obtained data were submitted for the analysis of variance, which showed substance only in the measures P, independent of the used source. The three studied sources of phosphate provided advantages in the high measures in all parameters evaluated, linked to the vegetative and productivity growth.