EFEITOS DA ADUBAÇÃO ORGÂNICA NO CRESCIMENTO DE ALFACE CRESPA

Abstract

Lettuce (Lactuca sativa) is the most important leafy vegetable in Brazil, has great economic and social importance in agriculture and ranks third among the vegetables grown in the country in terms of production volume. Besides being economically viable, organic fertilization can leave the product to be consumed with better properties. Based on this information, the present work aims to evaluate the organic fertilization of lettuce. The experiment was conducted in the Chácara Monte Alegre, located in the city of Inhumas-GO. The experimental design was the randomized block factorial (BCT-factorial) with 1 cultivar of crisp lettuce, 4 fertilizers and 3 evaluations with 4 repetitions, which were organizedas follows: T0 (control = soil without fertilizer), T1 (23.4 kg of cattle manure), T2 (7.8 kg of chicken litter), T3 (4 kg of chicken litter + 12 kg of cattle manure). The variables evaluated were plant height (PA); root length (RC); leaf dry matter (SFM) and total dry matter (TDS), and were evaluated at 29, 36 and 43 days after transplanting. The use of cow manure fertilization and the association of cow manure with tanned poultry litter in beds promoted the greatest development in height, greater leaf mass and dry mass of the aerial part in the crisp lettuce crop. The root part was not as significant because we used its leaves for marketing.