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.
