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.摘要：本研究针对宽叶双翅豆（Dipteryx alata Vog.）幼苗培育的设施环境与栽培基质技术开展评估。试验设置两类设施环境：其一为90°闭合式农用防虫网棚，侧方覆盖遮光率50%的黑色遮阳网，顶部覆盖遮光率50%的镀铝遮阳网；其二为45°闭合式农用防虫网棚，侧方与顶部均覆盖遮光率50%的黑色遮阳网。在每类设施环境中，均测试了以牛粪（E）与蛭石（V）按以下配比混合的栽培基质：100%牛粪+0%蛭石；90%牛粪+10%蛭石；80%牛粪+20%蛭石；70%牛粪+30%蛭石；60%牛粪+40%蛭石；50%牛粪+50%蛭石；40%牛粪+60%蛭石；30%牛粪+70%蛭石；20%牛粪+80%蛭石；10%牛粪+90%蛭石。研究结果表明，黑色遮阳网覆盖的设施环境可培育出品质更优的幼苗，且牛粪占比为10%、20%与30%的低占比基质，最适于宽叶双翅豆（Dipteryx alata Vog.）幼苗的培育成型。