Produção e nutrição mineral de pinheira adubada com silicato de cálcio e magnésio

Abstract

The objective of this work was to verify the effect of silicon application on pests' management, particularly in fruit borer, and sugar apple production in irrigated conditions. The experiment was performed in an experimental area in the Campus of the Unimontes, Janaúba, Minas Gerais state, Brazil. The experimental was conducted in a randomized block design with five treatments and five replications and one plant per parcel. The treatments were: control (without silicon application), doses of 40, 80 160 and 320 kg of SiO2.ha¹, being applied 0,40; 0,80; 1,60; 3,20 kg of silicate/plant. The -1 product was added in the soil. The characteristics like: physical-chemical of the soil, chemical of the leaves, vegetative and reproductive of the plants, physical-chemical of the fruits and percentage of infestation of pests were evaluated. The results were submitted to analysis of variance (F test) and regression models were adjusted to determine the effect of silicon. No significant differences between the treatments by test F for all evaluated characteristics. The average silicon content in leaves and fruits was 0,52% and 0,50%, respectively. The average of fruit weight, production per plant and productivity were 12 kg, 11,41 tons per hectare and 194.64 g, respectively. The percentage of infestation for fruit borer was 10,26% and 10,56% for mealybugs.