IN SITU DEGRADABILITY OF DRY MATTER AND NEUTRAL DETERGENT FIBER OF MOMBASA GRASS UNDER NITROGEN DOSES

Authors

  • Fabricia Rocha Chaves Miotto Universidade Federal do Tocantins
  • Bárbara Percya Lopes Coelho Universidade Federal do Tocantins
  • Rafael de Oliveira da Silva Universidade Federal do Tocantins

DOI:

https://doi.org/10.20873/uftsupl2021-12542

Abstract

The in situ technique is considered standard for evaluating food degradation in ruminant animal diets, allowing direct contact of the food with the ruminal environment. The aim of this study was to evaluate the in situ degradability of dry matter (DM) and neutral detergent fiber (NDF) of the leaf blade of Mombasa grass submitted to doses of nitrogen fertilization (0, 150 and 300 kg de N ha-1). Mombasa leaf samples were ground to 2 mm and subsequently incubated in the rumen of two adult male bovines. The incubation times were: 0;4;8;12;24;48;72 and 96 hours. Potential degradability, effective degradability by passage rate at 2%; 4%; 6% on DM and NDF degradability were measured. The potential degradability of DM and NDF was higher in treatments that received nitrogen fertilization (300 and 150 kg of N ha-1), as well as the effective degradability at 96 hours of incubation. The NDF and MS degradation curves were parallel regardless of the treatment. Nitrogen fertilization increases the degradability of DM and NDF in the leaf blade of Mombasa grass and fertilization with 150 or 300 kg ha-1 allows similar levels of degradation of DM and NDF.

Published

2022-04-10

How to Cite

Rocha Chaves Miotto, F., Lopes Coelho, B. P. ., & de Oliveira da Silva, R. (2022). IN SITU DEGRADABILITY OF DRY MATTER AND NEUTRAL DETERGENT FIBER OF MOMBASA GRASS UNDER NITROGEN DOSES. DESAFIOS - Revista Interdisciplinar Da Universidade Federal Do Tocantins, 8(Especial), 103–110. https://doi.org/10.20873/uftsupl2021-12542