Crescimento e produtividade da cultivar de batata ágata sob fertilização organomineral

Abstract

Potato cultivation is the culture that most requires the use of fertilizers, in relation to all other crops produced in Brazil. The emphasis of crop nutrition in front of the high productivity response requires that the management of fertilizer utilization be carried out efficiently, based on the variable requirement between the cultivars and the period of greatest demand, according to the stage of development of the plants . Therefore, it is important to carry out more studies regarding the need to test new products and analyze sources that can potentiate nutrient balance, improve soil physical quality, provide nutrients according to plant needs and reduce environmental impacts. In this sense, the objective was to evaluate the agronomic efficiency of organomineral fertilizers in potato, Agate cultivar. The experiment was conducted in the city of Cristalina-GO, between May 26 to August 29, 2012. The experimental design was in randomized blocks, in subdivide plots, with 5 doses of organomineral fertilizer and 4 replicates. The plots were constituted by the doses of the organomineral fertilizer 1619,10; 2443.60; 3258.20; 4072.70 and 4887.30 kg ha-1 corresponding to (40, 60, 80, 100 and 120%) of the mineral fertilizer dose at the organomineral source (2800 kg ha-1 of the 3-32-6 formulate) and the Subplots the times of collection. The characteristics evaluated at the time of sampling were number of stems, length of the largest stem, number of tubers, fresh mass of tubers, dry mass of stems, leaf dry mass, dry mass of tubers, dry mass of whole plant, productivity of Tubers (t ha-1). The greatest accumulation of dry mass occurred at 61, 74 and 89 days after planting for stems, leaves and tubers, respectively. The use of 40% of the dose of organomineral fertilizer provided satisfactory yields of tubers.