Influencia no desenvolvimento de mudas de café conilon cultivadas em substrato contendo húmus associado ao lodo de curtume

The use of industrial waste in agriculture is not a new fact, as the use of vinasse and filter cake of the sugar industry, there is also the use of sludge from tanneries. Despite the sludge benefits for its rich essential nutrient content for plants, the presence of chromium and sodium prevents their widespread use in agriculture, thus association studies that the sludge with organic matter such as humus, can increase its use as Alternative fertilizer. This study aims to evaluate the development of conilon coffee seedlings (Coffea canephora), formed on substrates produced with fixed dose of the solid residue of tannery sludge and variations in humus doses. The design was a randomized block, in the arrangement of 6 x12, and the treatments consisted of 4 humus levels (10%, 20%, 30% and 40% humus) and two witnesses (pure steep bank and substrate Conventional) with 12 blocks. Biometric measurements, such as height, number of leaves, stem diameter and crown of the seedlings with 120 days of age were evaluated.