Produtividade da videira itália no Vale Submédio do São Francisco sob adubação alternativa e coeficientes de demanda hídrica.

Abstract

Viticulture is of particular economic and social importance in the Lower Basin of the São Francisco Valley, as it involves a large annual turnover meant for the domestic and foreign markets. However, due to the intrinsic climatic conditions of the region as low rainfall and high evapotranspiration demand, the supply of water is essential to pair crops, as well as an efficient replenishment of nutrients to the soil, taking into account the physicochemical properties of matter organic. This project aims to evaluate different alternatives of fertilizer and water demand in Italy cultivation of the vine (Vitis vinifera I.) in the São Francisco Valley submedium. The experiment consisted of two cycles, the first of agosto/2013 de/2014 to January and the second in the march/2014 September 2014. Was performed different coefficients of irrigation (75%, 100%, 125% and 150% of the recommended ratio) and different fertilizer (100%, 75%, 50% and 25% of the recommended fertilizer product plus the basis of organic and humic acids Neossols), thus composing a split plot design with three replications. In the treatments described were evaluated productivity per plant, fruit quality (berry size, soluble solids content and total acidity), physiological variations on the vine (relative water content). The L4 treatment showed the lowest acidity. The L1 treatment had the lowest values of relative water content and average berry weight. The soluble solids content did not differ significantly with treatments. Due to different fertilization, the AD3 showed higher productivity. In the variable acidity, soluble solids content, relative water content in leaves and berry weight were no significant differences in fertilization factor.