Degrabilidade Ruminal da Matéria Seca e da Fibra em Detergente Neutro de Alguns Volumosos Utilizados na Alimentação de Cabras Leiteiras, Submetidas a Dietas com Diferentes Relações Volumoso:Concentrado
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Degrabilidade Ruminal da Matéria Seca e da Fibra em Detergente Neutro de Alguns Volumosos Utilizados na Alimentação de Cabras Leiteiras, Submetidas a Dietas com Diferentes Relações Volumoso:Concentrado. / Gonçalves, André Luigi; Lana, Rogério De Paula; Rodrigues, Marcelo Teixeira; Vieira, Ricardo Augusto Mendonça; De Queiroz, Augusto César; Henrique, Douglas Sampaio.
I: Revista Brasileira de Zootecnia, Bind 30, Nr. 6, 11.2001, s. 1893-1903.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Degrabilidade Ruminal da Matéria Seca e da Fibra em Detergente Neutro de Alguns Volumosos Utilizados na Alimentação de Cabras Leiteiras, Submetidas a Dietas com Diferentes Relações Volumoso:Concentrado
AU - Gonçalves, André Luigi
AU - Lana, Rogério De Paula
AU - Rodrigues, Marcelo Teixeira
AU - Vieira, Ricardo Augusto Mendonça
AU - De Queiroz, Augusto César
AU - Henrique, Douglas Sampaio
PY - 2001/11
Y1 - 2001/11
N2 - The objectives of the present study were to characterize and determine the parameters estimative of kinetics of carbohydrate degradation of alfalfa hay, elephant grass, tifton 85 hay, and corn silage, in different ratios of roughage:concetrate, using both in situ and in vitro technique. Five non pregnant non lactating goats, rumen cannulated, and averaging 58 kg were used during the experimental periods. A modified McDougall buffer was used for the in vitro assay to adjust pH to the values observed in the animals, by adding 1M of citric acid solution according to the roughage:concentrate studied. A 5×5 Latin square was used to evaluate five treatments consisted of roughage to concentrate ratio of 100:0, 80:20, 60:40, 40:60 e 20:80. It is suggested a significant influence of level of concentrate on ruminal digestibility of forages for all fractions studied. Associative effects of roughage and concentrate resulted on increment of degradation in the pH range of 6.2 to 6.8. Conversely a decrease on degradability was observed as pH reached values bellow 6.0. Lag time decreased as pH changed from 7.05 to 6.8 and maintained stable until 6.5, and a significant increase on lag values was observed thereafter, being noticed higher values at pH bellow 6.0 for all forages. Both in situ and in vitro incubation resulted in degradation curves of dry matter that were similar in shape for all feed studied as well as for rates of degradation. Thus it was suggested that both methods can be considered reliable to predict the observed parameters.
AB - The objectives of the present study were to characterize and determine the parameters estimative of kinetics of carbohydrate degradation of alfalfa hay, elephant grass, tifton 85 hay, and corn silage, in different ratios of roughage:concetrate, using both in situ and in vitro technique. Five non pregnant non lactating goats, rumen cannulated, and averaging 58 kg were used during the experimental periods. A modified McDougall buffer was used for the in vitro assay to adjust pH to the values observed in the animals, by adding 1M of citric acid solution according to the roughage:concentrate studied. A 5×5 Latin square was used to evaluate five treatments consisted of roughage to concentrate ratio of 100:0, 80:20, 60:40, 40:60 e 20:80. It is suggested a significant influence of level of concentrate on ruminal digestibility of forages for all fractions studied. Associative effects of roughage and concentrate resulted on increment of degradation in the pH range of 6.2 to 6.8. Conversely a decrease on degradability was observed as pH reached values bellow 6.0. Lag time decreased as pH changed from 7.05 to 6.8 and maintained stable until 6.5, and a significant increase on lag values was observed thereafter, being noticed higher values at pH bellow 6.0 for all forages. Both in situ and in vitro incubation resulted in degradation curves of dry matter that were similar in shape for all feed studied as well as for rates of degradation. Thus it was suggested that both methods can be considered reliable to predict the observed parameters.
KW - Fiber degradability
KW - In situ technique
KW - In vitro technique
UR - http://www.scopus.com/inward/record.url?scp=0347420297&partnerID=8YFLogxK
M3 - Tidsskriftartikel
AN - SCOPUS:0347420297
VL - 30
SP - 1893
EP - 1903
JO - Revista Brasileira de Zootecnia
JF - Revista Brasileira de Zootecnia
SN - 1516-3598
IS - 6
ER -
ID: 271557437