Adubação de manutenção em videiras cv. Bordô utilizando-se cinzas vegetais e esterco bovino em sistema orgânico

Abstract

RESUMOEste experimento teve como objetivo avaliar os efeitos da aplicação em cobertura de diferentes doses de cinzas vegetais e esterco bovino, no desenvolvimento e na produção de videiras cultivar Bordô. As doses utilizadas foram 0, 750, 1.500 e 2.250 g planta -1 de cinzas vegetais e 0, 5, 10 kg planta -1 de esterco bovino em esquema fatorial 4 x 3 (doses cinzas x doses esterco). Em dois anos de experimento foram avaliados o diâmetro de ramos e do tronco, o índice de área foliar, a produtividade, o peso médio dos cachos, o número de cachos e os teores foliares de macro e micronutrientes. Houve efeitos positivos dos tratamentos para todas as variáveis estudadas sem, contudo, alterar o status nutricional da planta em termos de teores foliares dos elementos. De modo geral, a dose de 5 kg planta -1 de esterco acrescido de 1.500 g planta -1 de cinzas vegetais permitiu, para a maioria das variáveis obter os melhores resultados com incrementos no índice de área foliar (38-71%) e na produtividade (106-167%). As duas fontes podem ser usadas de maneira a suprir as exigências nutricionais de videiras em produção necessitando, porém, de uma suplementação com outras fontes. Palavras-chave: adubação orgânica, agroecologia, nutrição mineral, Vitis labruscaMaintenance fertilization in grapevines cv. Bordô using wood ashes and cattle manure in organic system ABSTRACT This assay aimed to evaluate the effects of the superficial application of different doses of wood ashes and cattle manure, on vegetative growth and production of grapevines cv. Bordô. The doses used were 0, 750, 1,500 and 2,250 g plant -1 of wood ashes and 0, 5 and 10 kg plant -1 of cattle manure, in factorial scheme 4 x 3 (doses of ash x manure doses). During two years, the following variables were evaluated: diameter of the trunk and canes, leaf area index, yield, mean weight of cluster, number of clusters and macro and micronutrients contents in leaf. There were positive effects of the treatments for all variables, without, however, changing the nutritional status in terms of contents of elements in leaves. In general, for the majority of the variables, the treatment with 5 kg plant -1 of cattle manure added to 1,500 kg plant -1 of wood ashes, allowed to achieve the best results, with increments in leaf area index (38-71%) and yield (106-167%). The two sources can be used to supply nutritional demands of grapevines in production, needing, nevertheless, a supplementation with other sources.

Quality of Bokashi-Type Biofertilizer Formulations and Its Application in the Production of Vegetables in an Ecological System

“…Notably, non-residual agricultural practices such as homeopathy and biodynamic preparations offer viable alternatives for farmers. The biodynamic preparations demonstrated an effect on the development of the BRS Margot grapevine, as evidenced by the increased length of branches, CO 2 assimilation, RuBisCO enzyme efficiency, chlorophyll content, and a reduction in downy mildew incidence in the vine's aerial parts [81]. Beyond enhancing the well-being of those engaged in these practices, they exhibit integrated characteristics that focus on the management of agricultural production systems, rendering them sustainable in the long term [82].…”

Vegetative ash biomass as a potential source of silicon for soils in eucalyptus plantation

“…Vegetative ash is a type of industrial residue resulting from the combustion of vegetative biomass for the generation of energy or steam. It has been suggested for use as fertilizer in crops, such as Pines (Maeda et al, 2008) and Eucalypt , as well as in grapes (Piva et al, 2014), and radishes (Bonfim-Silva et al, 2015), among others. Biomass ash can improve soil physical properties, changing aeration, water retention ability, and salinity (Demeyer et al, 2001).…”