Publication: Consumo voluntario de forrajes ricos en compuestos secundarios: efecto sobre la producción de metano entérico, fermentación ruminal y síntesis de proteína microbiana en ovinos
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2020-11-11
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Universidad Complutense de Madrid
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Abstract
El primero objetivo del proyecto fue evaluar la influencia de forrajes de árboles tropicales sobre la producción de gas y metano entérico, degradación efectiva y digestibilidad real in vitro. La producción de metano, AGV y N-NH3 se midió a las 24 horas de incubación. Las leguminosas arbóreas evaluadas fueron: Clitoria arbórea, Erytrina fusca, Bauhinia forficata, Erytrina poeppigiana, Cratylia argentea, Glirycidia sepium, Cassia tora, y Flemingia macrophyla. Se utilizó liquido ruminal de cuatro ovejas adultas (PV: 81.8 ± 3.33 kg) fistuladas con cánulas permanentes en el rumen. La producción de gas se midió desde las 3 hasta las 120 horas de incubación. Los parámetros de producción de gas in vitro fueron menores (P<0.05) en la C. arbórea (A=41.68 mL gas/g MS; c=0.044 %/h y Lag=1.654 h). El ritmo medio de producción de gas para B. forficata fue de 1.017 ml/g MS (p<0.05). C. arbórea presentó una mayor (p=0.0001) degradación efectiva de la MS (40.461 g/kg) y una digestibilidad real de MS (82.517 g/kg) frente a los demás forrajes. Con respecto a los AGV la mayor (P<0.05) proporción de acético, propiónico y butírico de lo observó en C. arbórea, G. sepium y E. poeppigiana (72.52, 23.09 y 7.44 mol/100 mol respectivamente) y el menor (P=0.0001) ratio acético/propiónico se observó en G. sepium (2.92 mol/100 mol). El contenido de N-NH3 (mg/L) no mostró diferencias. La menor producción de metano (p=0.0001) se observó en C. arbórea (1.23 ml CH4/g MS). C. arborea y Cassia tora presentaron mayor potencial en la reducción de metano entérico y modulación ruminal...
The first objective of the project was to evaluate the influence of forages of tropical trees on the production of gas and enteric methane, effective degradation and in vitro real digestibility. The production of methane, AGV and N-NH3 was measured at 24 hours of incubation. The tree legumes evaluated were: Clitoria arborea, Erytrina fusca, Bauhinia forficata, Erytrina poeppigiana, Cratylia argentea, Glirycidia sepium, Cassia tora, and Flemingia macrophyla. Ruminal fluid of four adult ewes (PV: 81.8 ± 3.33 kg) fistulated with permanent cannulas in the rumen was used. Gas production was measured from 3 to 120 hours of incubation. The parameters of in vitro gas production were lower (P <0.05) in the C. arborea (A = 41.68 mL gas / g MS, c = 0.044% / h and Lag = 1.654 h). The average gas production rate for B. forficata was 1.017 ml / g MS (p <0.05). C. arboreal presented a greater (p = 0.0001) effective degradation of the MS (40.461 g / kg) and a real DM digestibility (82.517 g / kg) compared to the other forages. With respect to VFA, the highest (P <0.05) proportion of acetic, propionic and butyric observed in C. arborea, G. sepium and E. poeppigiana (72.52, 23.09 and 7.44 mol / 100 mol respectively) and the lowest ( P = 0.0001) acetic / propionic ratio was observed in G. sepium (2.92 mol / 100 mol). The content of N-NH3 (mg / L) showed no difference. The lowest methane production (p = 0.0001) was observed in C. arborea (1.23 ml CH4 / g MS). C. arborea and Cassia tora presented greater potential in the reduction of enteric methane and ruminal modulation..
The first objective of the project was to evaluate the influence of forages of tropical trees on the production of gas and enteric methane, effective degradation and in vitro real digestibility. The production of methane, AGV and N-NH3 was measured at 24 hours of incubation. The tree legumes evaluated were: Clitoria arborea, Erytrina fusca, Bauhinia forficata, Erytrina poeppigiana, Cratylia argentea, Glirycidia sepium, Cassia tora, and Flemingia macrophyla. Ruminal fluid of four adult ewes (PV: 81.8 ± 3.33 kg) fistulated with permanent cannulas in the rumen was used. Gas production was measured from 3 to 120 hours of incubation. The parameters of in vitro gas production were lower (P <0.05) in the C. arborea (A = 41.68 mL gas / g MS, c = 0.044% / h and Lag = 1.654 h). The average gas production rate for B. forficata was 1.017 ml / g MS (p <0.05). C. arboreal presented a greater (p = 0.0001) effective degradation of the MS (40.461 g / kg) and a real DM digestibility (82.517 g / kg) compared to the other forages. With respect to VFA, the highest (P <0.05) proportion of acetic, propionic and butyric observed in C. arborea, G. sepium and E. poeppigiana (72.52, 23.09 and 7.44 mol / 100 mol respectively) and the lowest ( P = 0.0001) acetic / propionic ratio was observed in G. sepium (2.92 mol / 100 mol). The content of N-NH3 (mg / L) showed no difference. The lowest methane production (p = 0.0001) was observed in C. arborea (1.23 ml CH4 / g MS). C. arborea and Cassia tora presented greater potential in the reduction of enteric methane and ruminal modulation..
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Tesis inédita de la Universidad Complutense de Madrid, Facultad de Veterinaria, Departamento de Producción Animal, leída el 03-02-2020