Blakeslee J A, Wilson H R
Poult Sci. 1979 Jan;58(1):255-6. doi: 10.3382/ps.0580255.
One-hundred-twenty Babcock B-300 ehns, 17 months of age, were placed one bird per cage with six replicates of five birds each per treatment. Four levels (0, 1, 2, and 4%) of technical grade tannic acid were added to a standard corn-soy layer diet. With the exception of feed comsumption during the second and third week, there were no significant differences for feed consumption, egg production, feed efficiency, fertility, or hatchability amond the control birds and those receiving tannic acid at the 1% level. The addition of tannic acid at levels of 2 and 4% resulted in significantly decreased feed consumption and egg production during the six-week experimental period. Fertility and hatchability were not significantly affected by dietary tannic acid.
120只17月龄的巴布考克B - 300母鸡，每个笼子放一只，每种处理设6个重复，每个重复5只鸡。在标准玉米 - 豆粕蛋鸡日粮中添加4个水平（0%、1%、2%和4%）的工业级单宁酸。除了第二周和第三周的采食量外，对照组和采食1%单宁酸的鸡在采食量、产蛋量、饲料效率、受精率或孵化率方面没有显著差异。在为期六周的试验期内，添加2%和4%水平的单宁酸导致采食量和产蛋量显著下降。日粮单宁酸对受精率和孵化率没有显著影响。
