ブロイラーの血液粘度と血漿浸透圧に及ぼす飼料摂取量と飲水量の影響

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  • Effects of Feed and Water Intakes on Whole Blood Viscosity and Plasma Osmolality in Broiler Chickens.

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Two experiments were carried out to determine the effect of feed and water intakes on whole blood viscosity in broiler chickens. In experiment 1, three feeding levels (25, 50 and 75g/bird) were provided to three groups of birds at 08.00h, respectively. After feeding, each bird was allowed to drink 100ml water at 09.00h. In experiment 2, two levels of water (50 and 150ml/bird) were given to two group birds, after 50g/bird feed was taken, at 09.00h. WBV and plasma osmolality (PO) increased with the increase of feed intake, and decreased with time after feeding. However, in 25g feed intake birds, PO increased with time after feeding. Plasma protein concentration (PPC) was (P<0.05) higher at 50 and 75g than at 25g feeding level. No significant differences were found in haematocrit (HCT) and plasma viscosity (PV) between feeding levels. There was no significant difference in PPC, HCT or PV between the two drinking levels. PO had a significantly (P<0.05) lower value at 150ml compared to at 50ml at 09.30h, although no significant difference was found in WBV. Moreover, WBV and PO tended to decrease with time at 50ml, while to increase at 150ml. As described above, WBV and PO increased with the increase of feed intake, but their changes with time after feeding were related to a water/feed ratio.

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