Tesis
Efeitos do uso de taninos sobre a digestibilidade dos componentes nutricionais de alimentos proteicos e volumosos
Fecha
2019-04-02Registro en:
MUNDIM, Adrielle Torres. Efeitos do uso de taninos sobre a digestibilidade dos componentes nutricionais de alimentos proteicos e volumosos. 2019. 48 f. Dissertação (Mestrado em Ciência Animal) - Universidade Federal de Mato Grosso, Faculdade de Agronomia, Medicina Veterinária e Zootecnia, Cuiabá, 2019.
Autor
Paula, Nelcino Francisco de
Abreu, Matheus Lima Corrêa
http://lattes.cnpq.br/5399407011000917
http://lattes.cnpq.br/9430306792139455
Paula, Nelcino Francisco de
004.568.941-52
http://lattes.cnpq.br/9430306792139455
Abreu, Matheus Lima Corrêa
106.141.357-88
http://lattes.cnpq.br/5399407011000917
004.568.941-52
106.141.357-88
Cabral, Luciano da Silva
019.711.357-55
http://lattes.cnpq.br/8009596890587747
Zervoudakis, Joanis Tilemahos
005.803.606-79
http://lattes.cnpq.br/1686212165863890
Fonseca, Mozart Alves
052.361.476-46
http://lattes.cnpq.br/7256447451006124
Institución
Resumen
Tannins are natural additives that can bind to proteins, metal ions, and polysaccharides
modifying the rumen fermentation. In vitro and in situ experiments were performed with the
objective of evaluating the effects of a tannin blend on in vitro digestibility of dry matter,
crude protein and neutral detergent fiber (IVDMD, IVCPD e IVNDFD, respectively) and in
situ digestibility of dry matter, crude protein and neutral detergent fiber (ISDMD, ISCPD e
ISNDFD, respectively) of proteins and fibrous feeds. The substrates were composed of seven
protein feeds: corn dried distillers grains (DDG), corn wet distillers grains (WDG), xylose-
treated soybean meal (soy pass®
), soybean meal, sunflower meal, cottonseed meal, cottonseed
cake, and five fibrous feeds: Urochloa brizantha cv. Marandu (samples from the rainy and
dry season), Panicum maximum cv. Tanzânia, corn silage and Tyfton-85 bermuda grass
(Cynodon sp) hay. Four bulls Nellore cannulated in the rumen, with average body weight of
578±37 kg and 27 months of age grazing Marandu grass were used. The treatments consisted
of the inclusion or not of tannins to the supplements of the animals, which two of the four
animals received supplementation with tannin (1g kg-1 DM), composed of 76% of condensed
(Extract of Quebracho - Schinopsi lorentzii) and hydrolysed (Castanea spp) tannins; and two
animals received supplementation without inclusion tannin. The ruminal fluid was collected
separately from each animal and the gas production (GP) recorded at 6, 12 e 24 h of
incubation. In vitro digestibility and concentration of ammoniacal nitrogen (N-NH3) were
measured at 24 h of incubation. The in situ digestibility was measured at 0, 2, 4, 8, 12, 24, 48,
72 and 96 h, which the residues were estimated for potentially degradable fraction (B),
digestion rate [kd
(h
−1
)] and undigested fraction (U). The model that presented the best fit to
the in situ data was chosen based on Akaike information criterion (AICc) and for each
parameter of the model, the 95% confidence interval was estimated. Addition of tannin
reduced (P<0.05) the IVCPD of the soybean meal. In contrast, there was no effect of tannin
supplementation on (P>0.05) the GP, N-NH3, IVDMD and IVNDFD of evaluated feeds.
Tannin supplementation reduced the parameter B and increased the fraction U of ISDMD and
ISCPD of cottonseed meal. There was an increase in the parameter kd
(h
−1
) for ISDMD of
soybean meal, Marandu grass (dry season) and reduction for corn silage. Additionally, the
inclusion of tannins promoted an increase in the parameters U and kd
(h
−1
) for ISCPD of
soybean meal. The effects of the blend of tannins were not the same for in vitro and in situ,
but the dose administration of the 1 g kg-1
provided a reduction in the digestibility of dry
matter and crude protein, and did not reduce the digestibility of neutral detergent fiber and
ruminal ammoniacal nitrogen.