Efecto del ensilaje y el heno de Calliandra calothyrsus, Flemingia macrophylla, Cratylia argentea y Vigna unguiculata sobre la producción de gas in vitro
- Bernal Gambín, Luis Jesús
- Avila, Patricia
- Ramírez, G.
- Lascano, Carlos E.
- Tiemann, T.
- Hess, H.
ISSN: 1022-1301, 1022-1301
Year of publication: 2008
Volume: 16
Issue: 3
Pages: 101-107
Type: Article
More publications in: Archivos Latinoamericanos de Producción Animal
Abstract
The volume of gas produced when silage and hay of tanniniferous legumes were fermented was evaluated. There were 28 treatments (14 each of silages and hays, half with and half without polyethylene glycol (PEG) to inactivate the tannins) three replicates per treatment. The seven types of forage were: tanniniferous, Calliandra calothyrsus (CC) 100% and Flemingia macrophylla (FM) 100%, non-tanniniferous Vigna unguiculata (VU) 100% and Cratylia argentea (CA) 100%; and the mixtures CC 67%/VU 33%, FM 67%/VU 33%, and CA 67%/VU 33%. The Gas Trasducer Technique (GTT) of Theodorou and William was used to determine the in vitro fermentation rate and magnitude. Gas production data obtained during 144 h of incubation were fitted to the Gompertz model. The silages showed a greater rate of gas production (GPR) than the hays (P < 0.05), but the latter were higher in dry matter degradability (DMD) and crude protein degradability (CPD) and ammonia liberation (NH3). The addition of PEG had little overall effect on GPR (but was effective with CC) or DMD, however it increased CPD and NH3 (P < 0.05). As to the effect of forage type, VU excelled in GPR followed by CA/VU and FM/VU; VU was also highest in DMD followed by CA/VU; while CA, CA/VU and VU were highest in CPD; CC and FM were decidedly inferior in GPR and in vitro degradability.