Cultivo de alface sob adubação orgânica e seu efeito residual em ambiente protegido.

Abstract

With the goal of studying the production of lettuce under organic fertilizer in polyethylene greenhouse, in two model experiments in the year put here the start and end dates of 2011, on the Universidade da Região da Campanha – Centro de Ciências Rurais, Bagé, Rio Grande do Sul, Brazil. The cultivars used: Regina and Mimosa Rubi, subject to the following effect: bovine (VB) and ovine(VO) manure vermicompost, according to ROLAS, as follows: T1 (absence fertilizer), T2 (0.5 ROLAS-VB); T3 (1 ROLAS-VB); T4 (1.5 ROLAS-VB); T5 (2 ROLAS-VB); T6 (0.5 ROLAS-VO); T7 (1 ROLAS-VO); T8 (1.5 ROLAS-VO); T9 (2 ROLAS-VO). The experiments were carried out in a randomized blocks. The second cultivation was held at residual fertilizer first cultivation. The variables studied were: fresh and dry aboveground biomass, fresh and dry, root diameter of plant, stem diameter, leaf area, leaf area, total number of leaves, root density, length of root, shoot and root system relationship macronutrients through laboratory testing. The results showed that:) it follows from applying the vermicomposts beef and sheep, like compost, allows obtaining good agronomic responses to lettuce cultivars Regina and Mimosa Rubi, b) worm compost, sheep used as fertilizer, is viable as residual effect on successive cultivation of lettuce CV. Regina and Mimosa Rubi, c) the mineral composition of bovine and sheep vermicompostos influences the production of lettuce in the first cultivationby promoting a residual effect in the second cultivation, d) doses of fertilizer ROLAS (2014) promote organic matter increase to levels above the recommendations.