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Abstract Full Text

Prediction of the nutritional value of grassy native and exotic of the Pantanal by means of the method of near infrared reflectance spectroscopy.

Abstract

It was aimed to evaluate near infrared reflectance spectroscopy with the conventional method, using a total of 132 samples for the Mesosetum chaseae and 45 samples for the Brachiaria humidicola, collected in two sub-regions of the Pantanal (Nhecolândia and Paiaguás). Determined crude protein (CP), was neutral detergent fiber (NDF), acid detergent fiber (ADF), lignin (LIG), phosphorus (P) and in vitro digestibility of dry matter (IVDDM). The same samples were also analyzed by spectroscopy, using the NIR 900 PLS (FEMTO). Data was mathematically treated by the MLR (Multiple Linear Regression) and regression models were fitted, having the results from the chemical analysis as independent variables and the results from the near infrared reflectance as dependent variables. The correlation coefficients of the Mesosetum chaseae, CP, NDF, AFD, LIG, P and IVDDM, 82; 92; 91; 81; 70 e 82%, respectively; end for the Brachiaria humidicola 81, 89, 89, 89 and 82%, respectively, they indicate that the system of analyses for infrared spectroscopy, it can substitute with advantages the conventional methods without compromising the precision and exactness of the results.