Nutrition and colostrum production in sheep. 2. Metabolic and hormonal responses to different energy sources in the final stages of pregnancy.

摘要: Lupins and maize, with similar concentrations of metabolisable energy, should produce responses in colostrum production at parturition when fed during the last week pregnancy, but, present study, we tested proposal that physical form whole lupins would restrict intake and, therefore, response compared cracked or maize. Fifty-five twin-bearing ewes were divided into four groups: 15 days 14 lupins, 13 maize received no supplement. The supplements increasing amounts for 6 to avoid acidosis. only from Day −8. All supplementary grains increased energy by >35%, but eating accumulated significantly more parturition: control, 207 g; 452 206 231 g (P < 0.05). Plasma urea extremely high (approximately 10 mmol L −1 ) both groups approximately double those control receiving We conclude gut distention is not a cause poor ammonia associated near-toxic plasma may be affecting colostrum.