<b>Fertility of substrata for mangabeira seedlings, containing coconut fiber and fertilized with phosphorus</b> - DOI: 10.4025/actasciagron.v29i5.743

Abstract

This experiment was carried out at Centro de Ciências Agrárias of UFPB, Areia, state of Paraíba, whose objective was to evaluate the fertility of the substrata composed by concentrations of coconut fiber from 0 to 40%, manure bovine from 0 to 25.5%, soil from 25 to 70%, sand 15% and triple superphosphate between 0 and 11 g L^-1. There was increase of the desirable chemical characteristics to the substratum with the increase of the concentration of soil, coconut fiber and maximum dose of the triple superphosphate. The coconut fiber increased the tenor of sodium in the substrata. It is recommended to use the concentrations of 0% of manure, 46% of soil, 39% of coconut fiber, 15% of sand and 11 g L^-1 of triple superphosfate, to obtain the maxima estimated values of organic matter, potassium, magnesium, calcium and phosphorus, and minima for H⁺+Al⁺³ and sodium.