Studies on the feeding value of agro-industrial by-products; 5: Effect of forage supplementation on the utilisation cocoa-pod based diets by ruminants
Three experiments were carried out to evaluate the effects of forage supplementation on the utilisation of cocoa-pod (pod) by ruminants. In the first trial, the nylon bag technique was used in a 3 x 3 latin square design to estimate pod degradability in the rumen of 3 sheep fed a basal 40 per cent pod diet with (i) no forage (B). (ii) guinea-grass (G), (iii) Centrosema (C) supplementation. Pod T 1/2 values were estimates, and rumen fluid volume, flow and turnover rates were estimated, using a single injection of CrEDTA. The quality of the two selected forages was determined and compared to that of pod in a second "in situ" degradability study using both cattle and sheep. Dry matter disappearance in 24 and 48 h was estimated. In the third trial, 2 groups of 6 sheep each were fed (a) basal 50 per cent pod diet or (b) basal plus Centrosema, and voluntary intake, digestibilities and N balance determined. Rumen function parameters were determined as in Trial 1. Pod T 1/2 (h) in the three sheep rumen environments (trial 1) were (i) 287.6, (ii) 187.3, (iii) 182.4, a 36 per cent reduction by forage supplementation. Other rumen functions studied were similar (P major 0.05). In the second trial, the degradability of the two forages in 48 h was poor (38 per cent G, 41 per cent C) and similar to that of pod (38 per cent). A sufficient reason for the lack of significant (P major 0.05) effects of Centrosema supplementation on voluntary intake (80 vs 70 g DM/kg 0.75); digestibility of: DM (57 vs 59 per cent), OM (59 vs 61 per cent), protein (65 vs 69 per cent), fibre (34 vs 37 per cent), NFE (57 vs 59 per cent) and N retained (200 vs 330 mg/kg 0.75) respectively, for the third trial treatments a and b which also had no effect (P 0.05) on the rumen function parameters measured. Apparently, the use of poor to medium quality guinea-grass and Centrosema as a supplement to pod based diets would not substantially enhance pod fibre utilisation
| Main Author: | |
|---|---|
| Format: | biblioteca |
| Published: |
Ene
|
| Subjects: | CASCARAS DE CACAO, PIENSOS, ALIMENTACION DE LOS ANIMALES, VALOR NUTRITIVO, SUPLEMENTOS DE PIENSOS, RUMIANTE, |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Three experiments were carried out to evaluate the effects of forage supplementation on the utilisation of cocoa-pod (pod) by ruminants. In the first trial, the nylon bag technique was used in a 3 x 3 latin square design to estimate pod degradability in the rumen of 3 sheep fed a basal 40 per cent pod diet with (i) no forage (B). (ii) guinea-grass (G), (iii) Centrosema (C) supplementation. Pod T 1/2 values were estimates, and rumen fluid volume, flow and turnover rates were estimated, using a single injection of CrEDTA. The quality of the two selected forages was determined and compared to that of pod in a second "in situ" degradability study using both cattle and sheep. Dry matter disappearance in 24 and 48 h was estimated. In the third trial, 2 groups of 6 sheep each were fed (a) basal 50 per cent pod diet or (b) basal plus Centrosema, and voluntary intake, digestibilities and N balance determined. Rumen function parameters were determined as in Trial 1. Pod T 1/2 (h) in the three sheep rumen environments (trial 1) were (i) 287.6, (ii) 187.3, (iii) 182.4, a 36 per cent reduction by forage supplementation. Other rumen functions studied were similar (P major 0.05). In the second trial, the degradability of the two forages in 48 h was poor (38 per cent G, 41 per cent C) and similar to that of pod (38 per cent). A sufficient reason for the lack of significant (P major 0.05) effects of Centrosema supplementation on voluntary intake (80 vs 70 g DM/kg 0.75); digestibility of: DM (57 vs 59 per cent), OM (59 vs 61 per cent), protein (65 vs 69 per cent), fibre (34 vs 37 per cent), NFE (57 vs 59 per cent) and N retained (200 vs 330 mg/kg 0.75) respectively, for the third trial treatments a and b which also had no effect (P 0.05) on the rumen function parameters measured. Apparently, the use of poor to medium quality guinea-grass and Centrosema as a supplement to pod based diets would not substantially enhance pod fibre utilisation |
|---|