Seedling production Cattleya eldorado in substrates with nutritive solution under shading screens

Abstract

Further researches are necessary to better understand the various technical and physiological aspects entailed by the use of substrates, shading and mineral fertilization resulting otimization in their application in the production of Cattleya eldoradoseedlings. The study was conducted with the aim of verify the effect of shading screens in the initial growth of Cattleya eldoradoseedlings in substrates fertilized with nutritive  solution. The experimental design was completely randomized 2x3x2 factorial with four replications. The studied factors: (T1)= crushed cupuaçupeel (sub1); (T2)= industrialized coconut fiber (sub2); (T3)= blend 50% sub1 + 50% sub2 with and without nutritive solution under red or black cromatinet. The analyzed variables were: aerial part height, number of leaves and chlorophyll a and b throught 300 days. Fertilization with nutritive solution promotes height growth and number of leaves results in higher levels of chlorophyll a and b, under red as black cromatinet, indicated for seedlings growth.