Produção de beterraba (beta vulgaris L.) irrigada com efluente agroindustrial.

Abstract

Irrigated agriculture is an activity that requires the largest volume of water in relation to the consumption of this resource for a lot of segments such as industrial, domestic and animal. The aim of this study was to use gross agribusiness and diluted effluent from processing milk and fruit, irrigation of sugar beet plants evaluating the growth and its physico-chemical and microbiological characteristics, as well as the effluent effects on the ground. The experiment was field, installed on Horticulture sector belonging to the Federal Institute of Paraiba Campus Sousa. The experimental design was randomized in blocks in a factorial scheme (3x5), three types of water and five doses of N, with 4 repetitions totaling 15 treatments and 60 experimental plots, corresponding to the water types: water from the São Gonçalo dam, dam water + effluent (1:1) and pure effluent and nitrogen doses in amounts of 0, 30, 60 90 and 120% or 0, 3, 6, 9 and 12g / m2 N, defined based on soil analysis and fertilization recommendation in coverage for beet of the State of Pernambuco. The diluted and raw wastewater showed higher EC and RAS and lower pH, ranking as salinity and medium sodicity water, but showed a lower microbial population of fecal coliform, lying within the range for beet irrigation. The following variables were analyzed: air development of culture, determination of NPK content in the beet leaf, fresh and shoot dry, weight, diameter, soluble solids, pH, total acid and citric acid and microbiological parameters tuber beet and soil chemical properties after experiment. It was observed that it is possible to produce beet with diluted gross reuse water to irrigate with matching production with pond water employing 3060% for effluent diluted 1:1 and 90% of fertilizer recommendation for beet culture, respectively. The effluent caused changes in the chemical characteristics of the soil, being advisable preventive practices to prevent the salinization or sodification of it. The diluted and raw wastewater didn’t change the chemical and microbiological beet characteristics, being possible to produce beet related to these very attributes appropriated to the consumption with no damage to consumer.