Produção de rabanete (Raphanus sativus L.) sob diferentes doses de adubação orgânica na região do Baixo Amazonas

Abstract

The objective of the study was to evaluate the effect of different dosages of cattle manure on the development of radish. The study was conducted from May to July 2024, at the Federal University of Western Pará (UFOPA), Juruti, Pará. The experiment was carried out in greenhouse II, where the treatments consisted of four doses of cattle manure with 10, 20, 30, and 40 g/pot1 (equivalent to 4, 8, 12, and 16 Mg/ha1 respectively) and a control without the application of cattle manure. The evaluated parameters were: plant height (cm), number of leaves per plant, central diameter of tuberous roots (mm), collar diameter of tuberous roots (mm), length of tuberous roots (cm), fresh and dry weight of leaves (g), fresh and dry weight of tuberous roots (g), and fresh and dry weight of secondary roots (g). The experiment was arranged in a Completely Randomized Design (CRD) with five treatments and six replicates, totaling thirty experimental units. The results obtained were statistically evaluated through analysis of variance using the F-test, followed by regression analysis and the maximum point determination. The SISVAR program was used for the analysis, testing linear and quadratic models to express the behavior of each variable at a 5% probability level. A correlation analysis was also performed to identify the degree of association between the variables. All variables evaluated by quadratic regression showed significant results with the application of cattle manure at doses of 12 and 16 Mg/ha1 compared to the control. However, when observing the maximum point of each variable studied, it was found that the results of the variables were either slightly above or below the cattle manure dose of 12 Mg/ha1. When correlating the study's variables, the majority showed a high positive correlation, confirming the good management of this agricultural experiment. This is important information for vegetable producers in the municipality of Juruti.