Produção de alface utilizando doses de esterco bovino.

Abstract

The crop lettuce has been carried in different regions and environmental conditions, which can hinder adaptation of cultivars and lead to losses of yield and quality of their leaves, especially in locations that have high temperatures and low soil organic matter content. The objective of this work was to evaluate the yield of lettuce as a function of different rates of cattle manure under semiarid conditions. The work was carried out in field in the experimental area belonging to the Center of Agrifood Science and Technology (CCTA) of the Federal University of Campina Grande (UFCG), Campus Pombal - PB. The experimental design was randomized complete blocks with five treatments corresponding to cattle manure doses (0, 15, 30, 45 and 60 t.ha-1), with four replications. The cultivation spacing was 20 x 20 cm. Significant difference was observed for all evaluated characteristics according to the rates of cattle manure applied to the crop, except for the root length. The use of cattle manure positively influenced the evaluated variables of lettuce crop. The highest values of fresh mass head and lettuce yield were obtained with the cattle manure rate of 14.2 t.ha-1. The use of cattle manure up to 60.0 t.ha-1 reduced the values of all evaluated variables, except for length and root dry mass.