Manejo do solo em sistema de produção integrada de rosas

Abstract

The Integrated Production System consists in the agricultural exploration seeking high quality production by using natural resources and regulating mechanisms in order to minimize the use of inputs and contaminants, thus guaranteeing sustainability. This work aimed at identifying the best dosage of chemical fertilizer, associated or not with green fertilizer, in an integrated production of ‘Carola’ roses. We used a randomized blocks experimental design, with plot subdivided in space, with eight treatments and four replicates. The treatments constituted of four percentages of chemical fertilizing according to recommendation for Minas Gerais, Brazil (25%, 50%, 75% and 100%), associated or not with green fertilizer (Calopogonium mucunoides). Plants which did not receive 100% of the chemical fertilizer received the supplementation of Bokashi (16 g/plant, via soil) and Supermagro (5% of leaves), in monthly applications. The evaluations were performed thrice a week during a year. The management of the culture was performed according to the norms of integrated production. In plants cultivated with green fertilizer the number of stems produced per plant (7.16 g), leaf dry mass (4.55 g) and total dry mass (12.06 g) were inferior compared to those cultivated without green fertilizer. The results of the accumulation and nutrient content on the dry mass of the aerial part analysis and the soil chemical characteristics indicate the possibility of using up to 75% of the recommended fertilizing, that is, the fertilizing may be reduced in up to 25%.