Flores Ruano, O.I. Ibrahim, M. Kass, D. Andrade, H.
Contribución ecológica de los taninos de especies leñosas sobre la utilización de nitrógeno por bovinos - Turrialba, Costa Rica 1999 - p. 255-258 - Serie Técnica. Reuniones Técnicas (CATIE) .
2 tab. 1 fig. 9 ref. Sum. (En)
This study was conducted on CATIE's experimental farm in Turrialba, Costa Rica to determine the effect of feeding forages of contrasting tannin concentrations on N utilisation by young bulls. The treatments were different supplements of C. calothyrsus and Gliricidia sepium (0: 100, 33: 67, 67: 33 and 100: 0), where increasing levels of C. calothyrsus simulated increasing tannin levels. C. calothyrsus had lower in vitro DM digestibility (30.2 vs 62.1 percent) and higher condensed tannins (18.5 vs 1.8 g kg DM exponente -1) than C. sepium. As the level of C. calothyrsus increased, N intake decreased, faecal N increased, urinary N, N retained and N absorbed decreased whereas the efficiency of use of absorbed N increased. The use of a mixture of forages with contrasting tannin concentrations contributed to increased efficiency of absorbed N and modified pathways of N excretion in ruminants.
9977573190
PLANTAS LEÑOSAS
PLANTAS CURTIENTES
CALLIANDRA CALOTHYRSUS
GANADO BOVINO
GLIRICIDIA SEPIUM
DIGESTIBILIDAD IN VITRO
TANINOS
LEGUMINOSAS FORRAJERAS
DESMODIUM OVALIFOLIUM
CONTENIDO DE MATERIA SECA
CONTENIDO DE NITROGENO
TURRIALBA
COSTA RICA
Contribución ecológica de los taninos de especies leñosas sobre la utilización de nitrógeno por bovinos - Turrialba, Costa Rica 1999 - p. 255-258 - Serie Técnica. Reuniones Técnicas (CATIE) .
2 tab. 1 fig. 9 ref. Sum. (En)
This study was conducted on CATIE's experimental farm in Turrialba, Costa Rica to determine the effect of feeding forages of contrasting tannin concentrations on N utilisation by young bulls. The treatments were different supplements of C. calothyrsus and Gliricidia sepium (0: 100, 33: 67, 67: 33 and 100: 0), where increasing levels of C. calothyrsus simulated increasing tannin levels. C. calothyrsus had lower in vitro DM digestibility (30.2 vs 62.1 percent) and higher condensed tannins (18.5 vs 1.8 g kg DM exponente -1) than C. sepium. As the level of C. calothyrsus increased, N intake decreased, faecal N increased, urinary N, N retained and N absorbed decreased whereas the efficiency of use of absorbed N increased. The use of a mixture of forages with contrasting tannin concentrations contributed to increased efficiency of absorbed N and modified pathways of N excretion in ruminants.
9977573190
PLANTAS LEÑOSAS
PLANTAS CURTIENTES
CALLIANDRA CALOTHYRSUS
GANADO BOVINO
GLIRICIDIA SEPIUM
DIGESTIBILIDAD IN VITRO
TANINOS
LEGUMINOSAS FORRAJERAS
DESMODIUM OVALIFOLIUM
CONTENIDO DE MATERIA SECA
CONTENIDO DE NITROGENO
TURRIALBA
COSTA RICA