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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
23/09/2002 |
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Data da última atualização: |
23/09/2002 |
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Autoria: |
ABIJAOUDÉ, J. A.; MORAND-FEHR, P.; TESSIER, J.; SCHMIDELY, P.; SAUVANT, D. |
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Título: |
Influence of forage: concentrate ratio and type of starch in the diet on feeding behaviour, dietary preferences, digestion, metabolism and performance of dairy goats in mid lactation. |
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Ano de publicação: |
2000 |
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Fonte/Imprenta: |
Animal Science, v. 71, n. 2, p. 359-368, 2000. |
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Idioma: |
Inglês |
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Conteúdo: |
In a 12-week trial, 12 Alpine and 12 Saanen dairy goats in mid lactation were housed in individual stalls for behavioural, digestive and metabolic studies. Eight of them Wen' fitted with ruminal cannulae. They were offered ad libitum four complete diets CR, CS, FR and FS (450 g dry matter (DM) per kg) in a 4 X 4 Latin-square design Forage: concentrate ratio was either low (C = 30 : 70) or high (F = 55 : 45) and starch source either rapidly (R, barley) or slowly (S, maize) degraded in the rumen.
Diet preferences were tested. DM intake, chewing activities and performance were determined. Ruminal pH and ammonia-nitrogen (NH3-N) concentrations were measured. Goats were also challenged intravenously with glucose (0.2 g/kg live weight) to assess glucose homeostasis.
CR was the most preferred diet. The level of intake differed according to the type of starch (2.2 kg DM per day of CR and FR and 2.0 kg DM per day of CS and FS). lowered ruminal pH significantly less than the other diets after the meal. Ruminal NH3-N concentrations w lower in goats given CR and CS than FR and FS. Goats' resistance to a glucose challenge was not different among diets. Milk yield was 2.00, 1.85, 2.01, 1.85 kg/day on CR, CS, FR and FS respectively. Milk fat content decreased significantly with diets rich in concentrate (24 v. 26 g/kg milk) but milk protein content varied only a little.
In conclusion it appears that (1) higher forage : concentrate ratios were less preferred and decreased ruminal acidity but increased daily chewing, ruminal NH3-N and milk fat content; and (2) rapidly degraded starch increased intake, ruminal acidity and milk yield. MenosIn a 12-week trial, 12 Alpine and 12 Saanen dairy goats in mid lactation were housed in individual stalls for behavioural, digestive and metabolic studies. Eight of them Wen' fitted with ruminal cannulae. They were offered ad libitum four complete diets CR, CS, FR and FS (450 g dry matter (DM) per kg) in a 4 X 4 Latin-square design Forage: concentrate ratio was either low (C = 30 : 70) or high (F = 55 : 45) and starch source either rapidly (R, barley) or slowly (S, maize) degraded in the rumen.
Diet preferences were tested. DM intake, chewing activities and performance were determined. Ruminal pH and ammonia-nitrogen (NH3-N) concentrations were measured. Goats were also challenged intravenously with glucose (0.2 g/kg live weight) to assess glucose homeostasis.
CR was the most preferred diet. The level of intake differed according to the type of starch (2.2 kg DM per day of CR and FR and 2.0 kg DM per day of CS and FS). lowered ruminal pH significantly less than the other diets after the meal. Ruminal NH3-N concentrations w lower in goats given CR and CS than FR and FS. Goats' resistance to a glucose challenge was not different among diets. Milk yield was 2.00, 1.85, 2.01, 1.85 kg/day on CR, CS, FR and FS respectively. Milk fat content decreased significantly with diets rich in concentrate (24 v. 26 g/kg milk) but milk protein content varied only a little.
In conclusion it appears that (1) higher forage : concentrate ratios were less preferred and decreased ruminal acidity... Mostrar Tudo |
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Palavras-Chave: |
Caprino leiteiro; Comportamento alimentar; Produção de leite. |
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Thesagro: |
Digestão; Digestibilidade; Lactação; Nutrição Animal; Rúmen. |
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Categoria do assunto: |
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Marc: |
LEADER 02472naa a2200265 a 4500
001 1528627
005 2002-09-23
008 2000 bl uuuu u00u1 u #d
100 1 $aABIJAOUDÉ, J. A.
245 $aInfluence of forage$bconcentrate ratio and type of starch in the diet on feeding behaviour, dietary preferences, digestion, metabolism and performance of dairy goats in mid lactation.
260 $c2000
520 $aIn a 12-week trial, 12 Alpine and 12 Saanen dairy goats in mid lactation were housed in individual stalls for behavioural, digestive and metabolic studies. Eight of them Wen' fitted with ruminal cannulae. They were offered ad libitum four complete diets CR, CS, FR and FS (450 g dry matter (DM) per kg) in a 4 X 4 Latin-square design Forage: concentrate ratio was either low (C = 30 : 70) or high (F = 55 : 45) and starch source either rapidly (R, barley) or slowly (S, maize) degraded in the rumen. Diet preferences were tested. DM intake, chewing activities and performance were determined. Ruminal pH and ammonia-nitrogen (NH3-N) concentrations were measured. Goats were also challenged intravenously with glucose (0.2 g/kg live weight) to assess glucose homeostasis. CR was the most preferred diet. The level of intake differed according to the type of starch (2.2 kg DM per day of CR and FR and 2.0 kg DM per day of CS and FS). lowered ruminal pH significantly less than the other diets after the meal. Ruminal NH3-N concentrations w lower in goats given CR and CS than FR and FS. Goats' resistance to a glucose challenge was not different among diets. Milk yield was 2.00, 1.85, 2.01, 1.85 kg/day on CR, CS, FR and FS respectively. Milk fat content decreased significantly with diets rich in concentrate (24 v. 26 g/kg milk) but milk protein content varied only a little. In conclusion it appears that (1) higher forage : concentrate ratios were less preferred and decreased ruminal acidity but increased daily chewing, ruminal NH3-N and milk fat content; and (2) rapidly degraded starch increased intake, ruminal acidity and milk yield.
650 $aDigestão
650 $aDigestibilidade
650 $aLactação
650 $aNutrição Animal
650 $aRúmen
653 $aCaprino leiteiro
653 $aComportamento alimentar
653 $aProdução de leite
700 1 $aMORAND-FEHR, P.
700 1 $aTESSIER, J.
700 1 $aSCHMIDELY, P.
700 1 $aSAUVANT, D.
773 $tAnimal Science$gv. 71, n. 2, p. 359-368, 2000.
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Embrapa Caprinos e Ovinos (CNPC) |
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