Utilização de resíduo proveniente do processamento de sangue bovino na fertilização de pastagem degradada de Urochloa brizantha cv. Marandu

Abstract

Pasture in Brazil is of great importance for Brazilian cattle, due to its extensive pasture practice, but the current pasture scenario is degradation. Due to the urgency of correcting this fertility correction is extremely important. Commonly was used inorganic fertilizers, but front the necessity of find an alternative ways because of finite sources coud be used agro-industrial residues since presenting agronomically interesting chemical composition and ease of transport, because under these conditions the use of these wastes become cheaper and allows environmentally correct disposal for these wastes often disposed of in a harmful way. The refrigeration industry represents a large generator of organic waste, due to the high number of units in Brazilian territory. The blood generated from the red line is used to make blood meal, widely used in animal nutrition and from this processing a residue is generated that is treated and discarded under application to the soil. Thus, in view of the positive results found from the use of other residues, the objective of this study was to observe the effect of the application of blood processing residues on Marandu grass degraded pasture in order to observe its structural, productive and chemical composition development. of the plant, already in the soil observe the alterations promoted by the same in its chemical characteristics. For this, six treatments were tested, of these five residue doses (0, 150, 300, 450 and 600 m³ ha-1) and another with chemical fertilization (CF) in LATOSSOLO VERMELHO distrófico area. For the doses the regression test was applied and in order to compare the results promoted by the residue and CF the Scott-Knott test at 5% probability was used. It was noted that the fertilization with residue provided evolution in structure, production and chemical composition of pasture equivalent to CF, surpassing it in mass production, leaf concentration of N and Fe leaf and content of Fe and H + AL in the soil. Finally the residue promoted interesting changes to pasture recovery and production.