Effect of Dietary Ascorbic Acid on Growth and Ascorbic Acid Level of Chicks Exposed to High Ambient Temperature.

概要

論文の詳細を見る
The present study was conducted to determine the effect of dietary ascorbic acid (AA, 150 and 1500ppm) on growth and plasma and tissue AA levels of chicks 24 and 26 days of age exposed to high ambient temperature for 7 days.1) Body weight gain, feed intake and feed efficiency of chicks were significantly decreased at high ambient temperature (40°C) compared with adequate temperature (20°C). However, the supplementation of AA reduced the severity of such adverse effects, as induced by high ambient temperature.2) Plasma, liver and kidney levels of AA were significantly depressed in chicks reared at 40°C but these reduced AA levels were significantly ameliorated by 1500ppm AA supplementation. For plasma and kidney levels of AA, significant correlations with kidney L-gulonolactone oxidase activity (r=-0.681, P<0.001 for plasma AA, r=-0.579, P<0.05 for kidney AA) were found.3) Thyroid weight and plasma T4 content were not significantly altered by the temperature treatment and AA supplementation.4) These results obtained in the present study suggested that the adverse effects of high ambient temperature on chicks could be alleviated by AA supplementation.
日本家禽学会の論文