Fermentation kinetics and in vitro degradation rates of grasses of the genus Cynodon

Sidnei   Tavares dos Reis; Marcus Vinícius   Gonçalves Lima; Eleuza Clarete   Junqueira de Sales; Flávio   Pinto Monção; João Paulo   Sampaio Rigueira; Leonardo David   Tuffi Santos

Fermentation kinetics and in vitro degradation rates of grasses of the genus Cynodon

Autores

Sidnei Tavares dos Reis

Marcus Vinícius Gonçalves Lima

Eleuza Clarete Junqueira de Sales

Flávio Pinto Monção

João Paulo Sampaio Rigueira

Leonardo David Tuffi Santos

Editor

Universidade Estadual de Maringá

Descripción

The present study aimed to evaluate the fermentation kinetics and degradation rates of Cynodon grasses estimated by semi-automated technique of in vitro gas production. The forages were: Coastcross , Tifton 85 and Tifton 68. Pressure readings were take n at 0, 2, 4, 6, 8, 10, 12, 15, 19, 24, 30, 36, 48, 72 and 96 hours. Dry matter degradability (DMD) was obtained by the percentage of dry matter (DM) remaining after 0, 6, 12, 24, 48 and 96 hours of fe rmentation. Tifton 85 showed a higher total gas production (p <0.05). Higher fermen tation rates were found at the begi nning of fermentation followed by subsequent reduction (p <0.05) over time. Tifton 85 and Tifton 68 showed higher values (p < 0.05) for soluble fraction, potentially degradable insoluble fraction, insoluble fraction, potential and effective degradability of dry matter in relation to Coastcross grass. Higher gas production during in vitro incubation of dry matter was observed for Tifton 85 g.