Granulado bioclástico na produção e qualidade de frutos da goiabeira ´Pedro Sato´

Abstract

This work had as an objective to study the use of the Lithothamnium type granulated bioclast in the production and quality of the guava tree cv. ‘Pedro Sato’ fruits. The experiment is a subproject of research begun in 2008, in a commercial orchard in the municipal district of Lavras, Minas Gerais. The treatments consisted of 3 doses of Lithothamnium type granulated bioclast, being 450; 900 and 1800 grams plant-1 year-1, parceled out in three applications; and two application forms: only via soil, and via soil associated to foliar application. The control consisted of the absence of treatment applications. The experimental design used was in randomized blocks, in a 3 (doses) x 2 (with and without foliar application) factorial outline, with an additional treatment (control), totaling seven treatments, with three repetitions and the useful parcel composed of four plants. Evaluated were: number of fruits per plant, production (kg plant- 1 ), productivity (t ha-1), fruit mass (g), peel mass (g), pulp with seed mass (g), fruit transverse and longitudinal diameters (cm), titratablel acidity (% of citric acid), hydrogenic potential, total soluble solids level (°Bx) and total soluble solids and titratablel acidity ratio. The use of the Lithothamnium type granulated bioclast provided an increase in the production and productivity of the guava tree ‘Pedro Sato'. The foliar application associated to soil application favored the organoleptic characteristics of the ‘Pedro Sato' guava tree fruits.