Título:	Fiber intake and digestibility of silages produced from five new brazilian sorghum cultivars.
Autor:	NEVES, A. L. A. SANTOS, R. D. dos GONÇALVES, L. C. PEREIRA, L. G. R. SCHERER, C. B. OLIVEIRA, G. F. ARAUJO, G. G. L. de MUNIZ, E. N.
Afiliación:	ANDRE LUIS ALVES NEVES, CNPGL; RAFAEL DANTAS DOS SANTOS, CPATSA; LUCIO C. GONÇALVES, UNIVERSIDADE FEDERAL DE MINAS GERAIS; LUIZ GUSTAVO RIBEIRO PEREIRA, CNPGL; CAROLINA B. SCHERER, UNIVERSIDADE FEDERAL DE MINAS GERAIS; GETÚLIO F. OLIVEIRA, UNIVERSIDADE FEDERAL DE SERGIPE; GHERMAN GARCIA LEAL DE ARAUJO, CPATSA; EVANDRO NEVES MUNIZ, CPATC.
Año:	2014
Referencia:	In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 51., 2014, Barra dos Coqueiros. A produção animal frente às mudanças climáticas e tecnológicas: resumos. Barra dos coqueiros: Sociedade Brasileira de Zootecnia, 2014.
Descripción:	Influence of fiber fractions on dry matter yield/hectare and "in situ" digestibility of foragcsorghum whole plant have been studied in the last years as these variables contribute to the selection of new cultivars. However. it has been reported that selecting new genotypes based only on dry matter production/hectare should be revised, possíbly because the great diversity of forage sorghurn varieties and their different agronomic characteristics have great irnpact on intake and in vivo digestibility of cell wall fractions, factors that are directly Iinked to voluntary consuruption, forage degradability in lhe reticulo-rumen, and absorption of nutrients in the total gastro-intestinal tract. The objective of the current study was to evaluate inrake and digestibility of neutral detergent fiber (NDF) and acid detergent fiber (ADF) of forage sorghum silages in rarns. Treatments consisted of five new cultivars of forage sorghurn recommended for lhe Brazilian northeastern serni-arid region (BRS Ponta Negra, BRS 655, BR 601, BRS 506 and BRS 610). Plants were harvested as grain exhibited dough stage of plant marurity and chopped in a statiõnary silage harvester to a length 01'2 em. Twenty-five rams (average body weight of21.7 kg ± 1.7) were used in this experirnent. During the first 25 days animais were adapted to the diets in metabolic cages, with total collection of feces being conducted over a 5 day period by using individual bags. A cornpletely randornized design with five treatments and five replicarions was used, with variables being tested to check if data had nonnaJ distribution before carrying out lhe analysis of variance, Means were cornpared by Tukey test at 5% probability (P<0.05). Chernical analysis of the five silages revealed the following properties: DM, NDF and ADF were on average of 32.4%, 61.2% and 34.2%, respectively. No difference (P>O.05) in DM intake (in g day' and g per unir of metabolic size - g UMS") and D!\·1apparent digestibility were observed, DNl intake (in g day") ranged from 604.0 to 700.0, while intake by UMS ranged from 63.4 to 68.4 g UMS1 . DM apparent digestibility was on average of 59.6(j'o. NDF intake (in g dai') was similar among treatrnents anel ranged frorn 362.1 10 454.1 g day', However, ít was observed difference (P<O.05) in intake in g UMS-1. with BRS 610 silages resulting in a higher consumption (44.5 g UMS·) than BR 60 I (35.3 g UMS'\ which, in turn, did not differ from the other cultivars. Treatments did not alter NDF apparent digestibility. which was on average of 56.3%. ADF intake (in g day') and (in g UMS1 ) 'Nas similar among treatments. with rnean values of 229.8 g day' anel 22.7 g UMS·1, respectively. However, it was detected differences (P<0.05) in ADF apparent digestibility, with BR 601. BRS 610 anel BRS 506 having a higher ADF apparent digestibility than BRS 655,which was similar to BRS Ponta Negra. These results suggest that lhe examined forage sorghum silages had intake anel digestibility of fiber fractions comparable to well known Brazilian cultivars (i.e. BR 700), and, rherefore, can be used for feeding Iambs under BraziJian serni-arid conditions.
Thesagro:	Metabolismo Nutrição Silagem Sorgo Cordeiro Fibra Ruminante
NAL Thesaurus:	Animal nutrition Metabolism Lambs
Palabras clave:	Digestibilidade de silagen Consumo de fibra
Tipo de Material:	Resumo em anais e proceedings
Acceso:	openAccess
Aparece en las colecciones:	Resumo em anais de congresso (CPATSA)