Intake, digestion and selection of roughage with different staple lengths by sheep and goats

Hadjigeorgiou, I.E., Gordon, I.J., and Milne, J.A. (2003) Intake, digestion and selection of roughage with different staple lengths by sheep and goats. Small Ruminant Research, 47 (2). pp. 117-132.

[img] PDF (Published Version) - Published Version
Restricted to Repository staff only

View at Publisher Website: http://dx.doi.org/10.1016/S0921-4488(02)...
 
23
4


Abstract

The diet selection, ingestive and digestive responses of goats and sheep offered a single forage, which was prepared with three staple lengths: long (L), medium (M) and short (S) (mean particle size (mm): 13.29, 7.26 and 0.69, respectively) were studied in three experiments. The sheep (Scottish Blackface wethers) increased their dry matter intake (sheep DMI: 60.1, 61.1 and 66.2 g DM/(kg W-0.75) per day for L, M and S) and reduced mean retention time (MRT) of the undigested residues (sheep MRT: 54.6, 52.9 and 45.9 h for L, M and S) and digestive efficiency (sheep DM digestibility: 0.524, 0.522 and 0.493 for L, M and S) with the reduction in forage particle size. The respective responses of goats (feral crosses) were not modified with forage staple length (goat DMI: 68.1, 65.9 and 67.3 g DM/(kg W-0.75) per day for L, M and S); (goat MRT: 3 8.7, 39.3 and 41.1 h for L, M and S); (goat DM digestibility: 0.495, 0.475 and 0.480 for L, M and S). However, both species had similar intakes of digestible dry matter (DDMI) on all staple lengths (mean DDMI: 32.0 and 32.6 g DDM/(kg W-0.75) per day for sheep and goats). On the longer staple lengths (L and M) goats masticated the fibre into smaller particles than did sheep and had (P < 0.01) a greater proportion of small particles in their boli (mean: 0.45 and 0.30 for goats and sheep). The selection of components within the forage offered was different for the two species. Goats consumed forage of lower nitrogen (N) (P < 0.01) and in vitro organic matter digestibility (OMD) (P < 0.05) and higher neutral detergent fibre (NDF) (P < 0.01) contents than sheep. This was associated with the residues from sheep having a coarser texture than those of goats. When the forages of different staple lengths were offered in pairs to the animals, there was no evidence for selection of forage types by either species. It would appear that the greater ability of goats to chew efficiently provides a reason for the different responses to staple length in intake, digestibility and MRT by the two species.

Item ID: 42571
Item Type: Article (Research - C1)
ISSN: 0921-4488
Keywords: intake, digestion, mean retention time, eating behaviour, preferences, staple length, roughage, sheep, goats
Funders: State Scholarship Foundation of Greece, Scottish Executive Environment and Rural Affairs Department
Date Deposited: 10 Feb 2016 07:43
FoR Codes: 07 AGRICULTURAL AND VETERINARY SCIENCES > 0702 Animal Production > 070204 Animal Nutrition @ 100%
SEO Codes: 83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8303 Livestock Raising > 830304 Goats @ 50%
83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8303 Livestock Raising > 830311 Sheep - Wool @ 50%
Downloads: Total: 4
More Statistics

Actions (Repository Staff Only)

Item Control Page Item Control Page