BIOCARVÃO, ADUBAÇÃO ORGÂNICA E MINERAL NO CRESCIMENTO DE PAU-ROSA (Aniba rosaeodora Ducke) EM SOLO DE TERRA-FIRME DA AMAZÔNIA CENTRAL

Abstract

The Oxisoil and Ultisoil sare the most predominant unit soil in the Amazon and it is characteristicsare are low cation exchange capacity, high acidity and high iron and aluminum contents, thus its use and management requires high amounts of lime and chemical fertilers to allow high productivity. Thus, to minimize the cost of production is necessary to find other alternatives to improve the level of fertility with low cost. In adition the objective of this project is to evaluate the influence of biochar, organic compost and mineral fertilizer increase soil fertility, improve the status nutritional and acelerate the increase of rosewood growth in the Yellow oxisoil. The experiment was a continuing an agrosilvicultural study installed at the Tropical Fruticulture Experimental Station of the National Institute for Amazon Research located at kilometer 42 of the BR-174 highway, Manaus-AM, Brazil 02°37’12”S e 60°02’27”W. The experimental design was completely randomized blocks, with five treatments: 1) control, 2) biochar, 3) biochar + organic compost, 4) biochar + NPK formulation and 5) biochar + organic compost + NPKormulation. and four replications (blocks). The variables analyzed were: biometric (plant height, stem diameter, and total number of leaves); nutritional (macronutrient and micronutrient concentrations in the leaves) and soil analysis (influence of treatments on soil fertility levels). The main results achieved were: in the third year of planting, the treatment with biochar (T2) provided the greatest growth in plant height; The combination of biochar and chicken manure (T3) increased the concentrations of calcium, magnesium and manganese in the leaves, in addition to increasing the levels of macronutrients in the soil. The combination of biochar with NPK formulation did not influence exchangeable acidity, but significantly increased macro and micronutrient content.