Shading Screens and Substrates for Dipteryx alataVog. Seedling Production

ABSTRACTThis study evaluated the technologies of protected environments and substrates for the production of Dipteryx alata Vog. seedlings. Two protected environments were used: agricultural screened, closing at 90 degrees, with black screen on the sides and aluminized screen on the cover, both with 50% shading; agricultural screened, closing at 45 degrees, with black screen on the sides and cover, both with 50% shading. In each environment, substrates composed of mixture of cattle manure (E) and vermiculite (V) at the following ratios were tested: 100% E + 0% V; 90% E + 10% V; 80% E + 20% V; 70% E + 30% V; 60% E + 40% V; 50% E + 50% V; 40% E + 60% V; 30% E + 70%; 20% E + 80% V; 10% E + 90% V. The black screen environment propitiates seedlings of better quality and the substrates with low percentages of cattle manure (10, 20 and 30%) are the most propitious for the formation of Dipteryx alata Vog. seedlings.