Fertilização orgânica em repolho: Adaptação de inovação tecnológica de agricultores familiares convencionais para o contexto dos sistemas de produção de base ecológica

Abstract

The study was conducted in the period May to November 2012 at the Experimental Station Cascata of Embrapa Clima Temperado, located in the municipality of Pelotas, Brazil. In order to evaluate the effect of organic nutrient sources on the growth , development and production of cabbage " Ox Heart ." The randomized block design was used with five replications and seven treatments. The calculation for solid fertilizer treatments was performed according to the recommendations of the Commission of Chemistry and Soil Fertility RS/SC, based on the results of the chemical analysis of fertilizers. Moreover, the calculation of net treatments was adapted from the methodology of conventional farmers of Feliz, RS. The experiment was conducted to fertilizer cabbage with fertilizers obtained from different organic wastes, constituting the following treatments: H2O - control (water); CaFv - double boiled aviary; EbFv - boiled beef manure, HL - Liquid Humus; Casol - double solid aviary; EbSol - solid manure; HSol - solid humus, Cycle, compactness, number of outer leaves leaf area, leaf area index, fresh weight, dry weight, and DM content of the outer leaves of the cabbage and head length; growth of the canopy: The following variables were evaluated heart, transverse and longitudinal diameter, length ratio and the longitudinal diameter, index format, volume and productivity. Moreover, the levels of nutrients in the soil were analyzed after harvest. For most variables the Casol and CaFv were similar, however, there was a tendency Casol produce better answers. Treatments with humus produced intermediate responses compared to treatments with poultry litter and manure. It was also a tendency of the solid humus to the liquid humus producing superior results. The responses of cattle manure were invariably lower than those of manure, with a tendency of solid forms of application are higher than the liquid forms. Most of the variables, boiled manure were similar to the control. Considering the results obtained and the conditions under which the experiment was conducted, it can be concluded that treatments based poultry litter, both in liquid and solid form, the greatest potential for growth, quality and yield of the crop of cabbage "Ox heart."