Composição química e degradabilidade ruminal de coprodutos de frutas tropicais

Abstract

The objective of this work was to evaluate the composition of ruminal degradation and bromatology of tropical fruit co-products as an alternative of supplementation for the vii animals during times of food shortage. Three crossbred steers with a mean weight of 350 kg with ruminal cannula were used, kept in individual pickets of Urochloa brizantha. In the evaluation of the in situ degradability, the already dried and ground samples were placed in TNT bags (TNT - 100g / m2) of size 5x5 cm introduced directly into the rumen in decreasing order of 96.48, 24, 18, 4, 2, and 0 hours in triplicates per animal and incubation time. All the sachets were removed at once and rinsed under running water, and then placed in a ventilation oven at 65 ° C for 48 hours, and stored for further analysis. The disappearance of dry matter and NDF was based on the weight difference between the incubated material and the material recovered after incubation. In order to estimate the degradation kinetics parameters, the first order asymptotic model was used. For the bromatological analyzes the fruit peel samples were pre-dried and ground to determine the contents of DM, PB, MO, EE, NDF, FDA, NIDA and NIDN. Lignin contents were determined by oxidation with potassium permanganate. All co-products evaluated had low dry matter content. The bark of pumpkin had a content of 45.07% DM. All foods presented low crude protein (CP), with the exception of cucumber that presented 83.63%. All foods presented low lignin content, low NDF content, low levels of FDA, with the exception of acerola that had FDA levels around 49.95%. The degradability of the potential dry matter was high for all food except for acerola, in the degradation of NDF, all foods presented highly degradable in the rumen, except for banana peel and acerola bagasse. Fruit co-products are highly degraded and are food alternatives for large producing animals.