Dinâmica de degradação in vitro da fibra em detergente neutro e qualidade da silagem do resíduo de palmeira-real australiana (Archonthophoenix alexandrae)

• Autor(a) principal: Coitinho, Tatiane Barbosa
• Data de Publicação: 2013
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/5781
• topic: Palmito; Digestibilidade; Sustentabilidade; Palmito; Digestibility; Sustainability; CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::NUTRICAO E ALIMENTACAO ANIMAL

This study aimed to analyze chemically the residue from the production of King palm, fresh and silage, to evaluate the in vitro degradation dynamics of neutral detergent fiber (NDF) of this residue and the silage quality. For in vitro incubations, six samples were used: sheath residue from the production of fresh palm, composed fresh (50% sheath: 50% palm leaves), sheath silage, composed silage, corn silage and fresh sugar cane, the latter two as food reference. The NDF degradation was evaluated in a simulated rumen environment by in vitro incubations, where the samples were submitted to different incubation times: 0, 3, 6, 9, 12, 24, 36, 48, 72 and 96 hours. The incubation procedure was repeated four times. The incubation residues were evaluated for NDF, followed by the adjustment of a logistic non-linear model. To evaluate the silage quality, dry matter (DM), gases and effluents losses besides the quantities of nitrogen ammonia and volatile fatty acids (VFAs) were calculated. The losses in ensilage process were smalls, compared to tropical grass silages and different (P<0.05) between silage sheath and silage composed. The residues studied behaved similarly to the reference foods regarding to NDF degradability over time, however, degradation of the fiber residues from King palm was very low (about 70-80% non-degraded residue at the end of incubation time). The average pH values over time did not differ among the analyzed residues and were within the range considered ideal for fiber degradation by microorganisms, as well as the average nitrogen ammonia concentration. The average ratio of major VFAs was within the normal for rich fiber diets. The quality of silage produced with residues from the production of King palm appears to be promising, however, these silages and fresh residues, according to chemical analysis and the degradation rates obtained for NDF, needs application of techniques that improve digestibility, aiming to increase their use and encourage the application of these materials more efficiently. It is required other studies involving the use of this residue, since these types of works, mainly in animal feed, are scarce.