2.6. Digestibility Trial (Exp. 1)
After the completion of the 120-d feeding trial, a digestibility trial was carried out for 7 d using the total faeces collection method. The goats were transferred to metabolism cages and allowed to adjust to the cages with the treatment diets for 3 d before the faeces collection. During the trial, the faecal output of each goat and the feed offered and refused were collected daily. They were then weighed, recorded and frozen (−20◦C), and the results of 7 days’ collection were pooled.Each composite sample of feed offered, refused and faeces were thawed to room temperature, mixed thoroughly and oven dried at 70◦C for 48 h. The dried feed and faeces samples of each animal were ground in a Willey mill to pass through a 1 mm sieve and stored in airtight plastic containers for further analysis. The nutrient/DM digestibility (in percent) was calculated as the difference between the nutrient/DM intake and that voided in the faeces, divided by the nutrient/DM intake and the quotient, multiplied by 100.
2.6. Digestibility Trial (Exp. 1)After the completion of the 120-d feeding trial, a digestibility trial was carried out for 7 d using the total faeces collection method. The goats were transferred to metabolism cages and allowed to adjust to the cages with the treatment diets for 3 d before the faeces collection. During the trial, the faecal output of each goat and the feed offered and refused were collected daily. They were then weighed, recorded and frozen (−20◦C), and the results of 7 days’ collection were pooled.Each composite sample of feed offered, refused and faeces were thawed to room temperature, mixed thoroughly and oven dried at 70◦C for 48 h. The dried feed and faeces samples of each animal were ground in a Willey mill to pass through a 1 mm sieve and stored in airtight plastic containers for further analysis. The nutrient/DM digestibility (in percent) was calculated as the difference between the nutrient/DM intake and that voided in the faeces, divided by the nutrient/DM intake and the quotient, multiplied by 100.
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