Effect of lactation and of roughage to concentrate ratios on outflow rates of protein supplements from the rumen of sheep and goats

Hadjipanayiotou, M.; Hadjidemetriou, D.

doi:10.1016/0301-6226(90)90030-a

Cited by 4 publications

(1 citation statement)

References 16 publications

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“…Additional studies conducted over short periods were included to evaluate differences between goats and sheep in DM intake (Wahed and Owen, 1986; Huston et al., 1988; Hadjipanayiotou and Hadjidemetriou, 1990; Hadjipanayiotou, 1995), rumen ammonia (NH 3 ) production (Cabrera et al., 1983; Darlis et al., 2000b; Yáñez‐Ruiz et al., 2004a) and rumen pH (Darlis et al., 2000b; Yáñez‐Ruiz et al., 2004a,b).…”

Section: Methodsmentioning

confidence: 99%

Quantifying differences in total tract nutrient digestibilities between goats and sheep

Sales

Jančík

Homolka

2011

Animal Physiology Nutrition

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Conclusions from narrative qualitative reviews on differences in total tract digestibilities between goats and sheep did not account for variability among studies. Therefore meta-analytic techniques were used to describe the magnitude of these differences with numerical values. A unitless effect size (Hedges' g) was applied within studies to measure differences in digestibilities of dry matter (DM; 104 comparisons), organic matter (OM; 93 comparisons), crude protein (CP; 85 comparisons), neutral detergent fibre (NDF; 74 comparisons), acid detergent fibre (ADF; 59 comparisons), cellulose (24 comparisons), hemicellulose (18 comparisons) and gross energy (GE; 29 comparisons). The absence and inability to describe independent factors which contributed to variation among studies necessitated the use of frequentist random effects and hierarchical Bayesian models in the calculation of summary statistics across studies. Digestibilities of DM, OM, CP, NDF, ADF and hemicellulose were higher (p < 0.05) in goats than sheep when all-forage diets were fed. When concentrates were included in the diets, there were no such differences. Differences between goats and sheep in DM intake were found to be non-significant. Differences in nutrient digestibilities of forages as sole feed implies that species-specific values have to be used in feed formulation and feeding strategies. However, caution is needed when extrapolating results from stall-feeding, which is how digestibility data are usually measured, to grazing conditions.

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