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Details for article 28 of 74 found articles
| Title: |
Digestibilidade in vitro e in situ de três forrageiras tropicais colhidas manualmente e por vacas fistuladas no esôfago = In vitro and in situ digestibility of three tropical forages collected manually and by esophageal fistulated cows |
| Author: |
Edmundo Benedetii Norberto Mario Rodríguez Warley Efrem Campos Lúcio Carlos Gonçalves Iran Borges |
| Appeared in: |
Acta scientiarum. Animal sciences |
| Paging: | Volume 30 (2008) nr. 2 pages 203-210 |
| Year: |
2008 |
| Contents: |
Avaliou-se a digestibilidade in vitro (DIV) e in situ da matéria seca (MS) e “in situ” da proteína bruta (PB), fibra em detergente neutro (FDN) e fibra em detergente ácido (FDA), celulose e hemicelulose das gramíneas Colonião (Pannicum maximum) (COL), Brachiaria decumbens (BRACH) e Napier (Pennisetum purpureum) (NAP) de amostras colhidasmanualmente e por vacas portadoras de cânula no esôfago. A DIV-MS das gramíneas colhidas, manualmente, foi de 64% para NAP, 63% para BRACH e 55% para COL. A fração insolúvel potencialmente degradável (%) e a taxa de degradação (% h-1) das gramíneas NAP, BRACH e COL foram, respectivamente, de 62,8 e 6,4; 64,7 e 5,0 e 65,7 e 4,0 para a MS;62,0 e 4,2; 62,6 e 3,0 e 70,8 e 2,6 para a PB; 77,2 e 6,3; 75,5 e 4,9 e 70,1 e 3,7 para a FDN. Concluiu-se que a oferta de forragem estudada permitiu aos bovinos seleção dos alimentos de forma a se obter dietas com valores nutritivos superiores aos disponíveis nas pastagens e que para o sistema de pastejo contínuo com carga animal variável, a gramínea Napier mostrou-se mais digestível, seguida pela Braquiária e pelo Colonião que apresentou os menores parâmetros de degradação ruminal.This study evaluated in vitro (IV) and in situ dry mater (DM) digestibility, as well as in situ crude protein (CP), neutral (NDF) and acid (ADF) detergent fiber, cellulose and hemicellulose degradability of Colonião (Pannicum maximum) (COL), Brachiaria decumbens (BRACH), and Napier (Pennisetum purpureum) (NAP) grasses. The grasses were collected manually and from esophagealfistulated cows. The IV-DM digestibility of the manually collected samples were 64% for NAP, 63% for BRACH and 55% for COL. The insoluble potentially degradable fraction (%) and the degradation rate (% h-1) of NAP, BRACH and COL grasses were 62.8 and 6.4,64.7 and 5.0, and 65.7 and 4.0 for DM; 62.0 and 4.2, 62.6 and 3.0, and 70.8 and 2.6 for CP; 77.2 and 6.3, 75.5 and 4.9, and 70.1 and 3.7 for NDF, respectively. It was concluded that forage availability was adequate and allowed forage selection by cattle, as the selected dietwas more nutritive than the manually collected grass. For pasture systems with variable animal weight per hectare, Napier grass had higher digestibility, followed by Brachiaria and Colonião, which showed the lowest degradation values. |
| Publisher: |
Eduem - Editora da Universidade Estadual de Maringá (provided by DOAJ) |
| Source file: |
Elektronische Wetenschappelijke Tijdschriften |
Details for article 28 of 74 found articles
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