AGRONOMIC PERFORMANCE OF LETTUCE CULTIVARS UNDER DIFFERENT DOSES OF ORGANIC FERTILIZER IN THE ARIQUEMES/RO REGION

Abstract

There is a shortage of improved cultivars suitable for environments with high temperature and rainfall, such as the region of Ariquemes, RO, which makes their agricultural performance difficult. However, there is genetic variability and variation in behavior among existing lettuce cultivars, which suggests that among materials genetic the existence of some (ns) in tolerating abiotic conditions of this region. Thus, the objective of the work is to evaluate the agronomic performance of lettuce cultivars under different doses of organic fertilizers in the region of Ariquemes, RO. The experiment was carried out in a greenhouse in the experimental area of the Federal Institute of Rondônia – Campus Ariquemes. The experimental design was in a randomized block design (DBC), with treatments distributed in a factorial arrangement consisting of three lettuce cultivars and 6 doses of organic fertilizer, with four replications. The experiment was conducted in beds under a greenhouse with each plot measuring 1.0 m wide and 1.0 m long for each treatment, thus creating 18 treatments in 4 replications, totaling 72 plots. The Lucy Brown cultivar showed better agronomic performance due to the variables evaluated, at doses 3.0 and 5.0 ton ha^-1. The Veneranda and Mimosa cultivars presented intermediate agronomic performance, with values approaching those of the cultivars with the best agronomic performance, requiring further studies to prove these results.