Cultivo hidropônico de alface com soluções organominerais apropriadas a agricultura familiar

Abstract

The quantity and quality of food are food security and nutrition factors, ensuring health for people who consume them. Aiming to develop new options cultivation suitable for family farms was carried out this work by testing the effect of a nutrient solution for easy formulation for nutrition, production and microbiological parameters of the varieties of lettuce 'Thaís'' Vanda 'and' Veronica ', in order to identify the most adaptable to hydroponics in area Brejo Paraibano, and organo solutions, suitable for cultivation in family farming. The survey was conducted at the Center for Agricultural and Environmental Sciences (CAAC), State University of Paraíba (UEPB), adopting the experimental randomized block design in a split plot design with three replications. The plot consisted of eight nutrient solutions (one mineral - witness and seven levels of electrical conductivity variation of an organic-solution) and the subplots were arranged three varieties of lettuce. The plants were evaluated parameters of vegetative nature (number of leaves, diameter of the head lettuce and stem diameter), production (fresh and dry mass of leaves and root), nitrate levels present in plants and microbiological analysis (total coliforms and thermophilic) . In nutrient solutions and water used for irrigation of plants microbiological analyzes were performed. With the use of the physical structure of low-cost production of lettuce varieties under the nutrient solutions, evaluated the economic viability. It was found to be viable solutions for the production of hydroponic crops, especially where used irrigation water quality below the standards for vegetable production. Among the electrical conductivity of the organomineral solution, lettuce best growth was obtained with CE 1.7 and 2.1 dS m-1. Both microbiology analysis as the nitrate are indicative of consumption viability of vegetables grown under the conditions set forth in this experiment. The hydroponic lettuce, using an alternative structure and modified solutions is a profitable activity for production in family farming.