Utilização e viabilidade de um polímero hidroabsorvente e de lodo de esgoto compostado na alface americana

• Autor(a) principal: Oliveira, Sebastião de
• Data de Publicação: 2019
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da USC
• Texto Completo: https://tede2.usc.br:8443/handle/tede/464
• topic: Condicionadores de solo; Culturas agrícolas; Redução do uso da água; Lactuca sativa; Nitrogênio; Soil conditioners; Agricultural crops; Water use reduction; Lactuca sativa; Nitrogen; CIENCIAS EXATAS E DA TERRA

In recent years several types of synthetic polymers have been developed for various purposes, some of which are recommended for agricultural use as soil conditioners because of their ability to improve physicochemical properties. One of these polymers is the hydroabsorbent, widely used in numerous agricultural crops. At the correct dose, and according to the plant to be cultivated and the size of the soil, the polymer can result in less labor and water consumption. The objective of this study was to enable the use of hydroabsorbent polymer, organic compound and chemical nitrogen for lettuce cultivation in the productive and nutritional parameters in three crop cycles. The experiment was conducted in 15 L plant pots. The experiment was carried out with five treatments and four replications in subdivided plots with main polymer treatment and without polymer and secondary treatments: T1 - 100% of the need for N (urea) culture; T2 - 25% of N organic fertilizer and 75% N (urea); T3 - 50% organic fertilizer of N 50% N (urea); T4 -75% organic fertilizer of N and 25% N (urea) and T5 - 100% N organic fertilizer. The organic fertilizer used was composted sewage sludge. All treatments were done with plots subdivided with polymer and without polymer. In this experiment on fresh lettuce production, treatments T2, T3, T4 and T5 obtained a superior result in relation to T1 that received only urea. Lettuces that did not receive the polymer were superior and all parameters evaluated.