Adubação nitrogenada associada à aplicação de silício na cultura da abobrinha.

Abstract

Whenever available nutrient content in the soil is lower than the need for plants, it is necessary to supply this nutrient through fertilization to avoid nutritional deficiency, among which nitrogen is one of the most critical and therefore nitrogen fertilization is of fundamental importance. In addition to the lack of nutrients the plant can undergo different types of extractions that can be minimized through silicate fertilization. The objective of this study was to evaluate the effect of nitrogen fertilization associated with silicon foliar application on the growth, phytosis, nutrition, yield and quality of the Italian zucchini. The experiment was carried out at the facilities of EUPB, Campus - IV, CCHA in a randomized block design (DBC) in a 5 x 2 factorial scheme with 3 replications. The traces. The experiment was conducted . The experiment was conducted at the facilities of EUPB, Campus - IV, CCHA, in a randomized block design (DBC) in a 5 x 2 factorial scheme with 3 replications. The treatments consisted of five nitrogen doses (30, 60, 90, 120 and 150 kg ha-1 of N) and silicon application (without and with application of 6.0 g plant-1). The variables analyzed were: leaf area; plant height; stem diameter; number of leaves leaf contents of N, P, K, Ca, Mg and S; dry mass of leaves, stem and shoot; number of fruits per plant; fruit weight per plant; average weight of fruits; productivity; fruit length and diameter; peel and pulp thickness; peel and pulp weight; pH; soluble solids; titratable acidity; Vitamin C; glucose and fructose. The estimated nitrogen dose of 114.51 kg ha-1 promoted the highest productivity 54.94 t ha-1. Silicon application yielded 20.2% higher yield compared to plants that did not receive silicon. The estimated N dose of 98.33 Kg ha-1 provided higher fruit weight regardless of silicon application. The highest pulp weight was provided by the estimated N dose of 106.52 Kg ha-1 and was not affected by silicon application. Nitrogen rates negatively influenced fruit glucose and fructose levels.