Determinação da fibra em detergente neutro e fibra em detergente ácido em alimentos volumosos utilizando tecido não tecido com diferentes gramaturas

Abstract

With the main objective of reducing costs with the analysis of NDF and ADF by the technique of filtering bags made of fabric F57 (Ankom®) Which has a high cost, a lot of research have been made with the purpose of verifying the best type of alternative fabric can be used on the determination of the analysis by the filtering bag technique. The objective was to analyze the fiber in acid detergent and in neutral detergent by the technique of the filtering bags using the non-woven fabric with different weights (80 g/m2, 100 g/m2 e 120 g/m2). Were evaluated the dry matter contents (DM), fiber in neutral detergent (NDF) and fiber in acid detergent (ADF) in Tifton 85 hay sample, pelleted grass hay, mulatto grass II and sugarcane bagasse, by the technique of the filtering bags using three different weight of non-woven fabric, 80 g/m2, 100 g/m2 e 120 g/m2 using the fiber digester equipment, model TE-149, brand TECNAL. For evaluation of possible loss of particles by the fabric, the quantitative filter paper was used as the standard sample of cellulose. The experimental design used was the entirely randomized, in a 4x3 factorial scheme, with 4 roughage foods and three non-woven fabric weights, with six replicates per treatment. For the particle loss the completely randomized design was used with 3 treatments (weight of the bags) and 3 replicates. It was found that the fabric of 120g/m2 had the biggest loss of particles, followed by the fabric of 80g/m2 and the lowest loss was observed for the 100g/m2 fabric. The lowest NDF content of the voluminous foods evaluated was observed for the non-woven fabric which differed statistically from the highest value obtained in the 100g/m2 fabric. The different fabrics evaluated provided different values of ADF, as the lowest value obtained for the fabric of 120g/m2 and the highest value for the 100g/m2 fabric. It was concluded that non-woven fabric in the weight of 80g/m2 can be replaced by the 100g/m2 fabric for the analysis of the NFD, however , caution is recommended in this substitution due to the greater loss of particle occurred by the fabric of 80g/m2. In the ADF analysis the 100g/m2 non-woven fabric cannot be replaced by the 80g/m2 and 120g/m2 fabrics.