Silício e esterco bovino na fertilidade de um neossolo flúvico, na nutrição mineral e produção do maracujazeiro amarelo

Abstract

The yellow passion fruit, also called sour passion fruit, belonging to the Passifloraceae family, has a great representation on the national scene in fruit production, standing out as a crop with great potential for expansion in the semi-arid region of Paraíba. In this context, the aim of this study was to evaluate the influence of silicon and organic fertilization with cattle manure on the fertility of a FLUVIC NEOSOL, on mineral nutrition and on the productivity of yellow passion fruit. This research was carried out, from 03/2023 to 03/2024, in an experimental area, belonging to the Center for Human and Agricultural Sciences of the State University of Paraíba, Campus - IV, Catolé do Rocha, PB, located in the high backlands of Paraíba. The experiment was conducted in a 5 x 2 factorial arrangement distributed in randomized blocks with four replications and four plants per plot, totaling 40 plots. Factor A was related to silicon doses in the soil of 0.0; 27, 54, 81 and 108 g plant-1 in the form of silicic acid solution and factor B, referring to the two levels of organic matter in the soil (value existing in the soil -1.0% and increasing the content to 4 %). The variables analyzed were the chemical attributes of soil fertility, the levels of macro and micronutrients in dry matter and silicon in the soil and plants. The data were subjected to the F test with 95% confidence and linear and polynomial regressions. The application of doses above 82 g plant-1 of Si associated with the application of organic matter promoted greater mineral nutrition of the sour passion fruit and greater soil fertility in macronutrients, micronutrients and silicon, promoting greater productivity of passion fruit fruits.