Effect of Dietary Propionate on the Feed Utilization and the Chemical Characteristics of Blood Plasma in Sheep Fed with High Concentrate Ration
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概要
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This experiment was carried out to examine the effect of feeding of high concentrate ration supplemented propionate on the feed utilization and the characteristics of blood plasma by using eight castrated sheep. The ratio of concentrate to roughage (grass hay) was 8 : 2 on dry matter basis and propionic acid was supplemented 75% of physiological level. The experimental animals were kept for 6 months with feeding 37.5 g/body weight (kg) <SUP>0.75</SUP>/day of TDN.<BR>Propionate supplement led to improve the feed utilization ; i.e. daily gain was more and feed conversion ratio was lower in propionate feeding than in control feeding. Insulin in blood plasma (μU/m<I>l</I>) increased suddenly from 14.5, pre-feeding to 64.9, at 30 minutes after feeding by propionate supplement. Glucose concentrations were not different between both treatments, though showing a direct decrease and a gradual increase during 6 hours after feeding in both treatments. FFA concentration changed lower level in propionate supplement than in control ration after feeding. It was thought to be related with insulin rise that propionic acid of blood plasma VFA increased rapidly till 1 hour after feeding in the case of propionate supplement. <BR>In case of high concentrate ration, propionate supplementation would improve feed utilization because insulin secretion accelerate the assimilation in the body.
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日本緬羊研究会 | 論文
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