半胱胺对银狐饲料消化能力的影响

The Influence of Cysteamine on the Feed Digestion of Silver Fox

为研究半胱胺对银狐饲料消化能力的影响，选用2月龄左右、健康银黑仔狐共106只（53♂＋53♀）。随机分96只（48♂＋48♀）为试验组，10只（5♂＋5♀）为对照组。采用复因子试验设计中的析因试验设计，为二因子有重复的试验设计，一个因子为半胱胺的不同添加剂量，另一个因子为半胱胺的不同添加间隔时间，在每间隔3、5、7和9d分别按每千克体重添加40、70和100mg的半胱胺。分别测定了干物质采食量、干物质表观消化率和粗蛋白质表观消化率，为消除不同间隔时间对消化试验的影响，正式试验进行12d（从2004年8月18日～29日），结果发现每间隔5d按70mg／kg体重浓度添加1次半胱胺效果最好，它可使银狐干物质和粗蛋白质表观消化率分别比对照组提高16．19％（P〈0．01）和15．97％（P〈0．01）；试验组银狐干物质采食量比对照组低，其中70mg／kg体重5d组可比对照组银狐干物质采食量降低4．65％（P〈0．01）。

To study effect of cysteamine on the feed digestion of silver foxes, 106 （53♂ ＋53♀ ） of two-month-old healthy silver foxes were selected. Among them, 96 （48 ♂ ＋48♀ ） foxes were randomly selected for the test group, and the other 10 （5 ♂＋5 ♀ ） individuals were for the control group. Experiment design of factor analysis, a multiple factor design, was adopted, in which two factors were repeated in experiments. Different amount of cysteamine （40 mg, 70 rng, 100 rng per kg of body weight） were added respectively at 4 different time intervals （3, 5, 7 and 9 d）. To eliminate influence of time intervals, the experiment lasted for 12 days （from August 18 to August 29 in 2004）. Results showed that the best one was the combination of 70 mg/kg BW of cysteamine added every 5 days, which apparent digestibility of the dry matter and the crude protein by 16.19 % （P〈0. 01） and 15.97 % （P〈0. 01） respectively compared with those of the control group. The dry matter intake of the test group was lower than that of the control group, and dry matter intake of individuals of the combination of 70 mg/kg BW of cysteamine added every 5 d reduced by 4. 65% （P〈0. 01）.