育成黑熊营养需要量的研究

Study on the Nutrition Requirement of Grown Selenarctos

选用４０头生长期黑熊（平均始重３１．２０±６．４７ｋｇ），随机分为４组（每组１０头）．试验前期１２个月，研究高营养水平（粗蛋白水平为１８．２～２５．３％）的日粮对育成黑熊生长速度的影响．试验后期８个月，研究低营养水平（粗蛋白水平为１２．９～１９．９％）的日粮对育成黑熊生长速度的影响．结果表明：组间比较，用高营养水平日粮喂的黑熊各组生长速度差异不显著（Ｐ＞０．０５），而用低营养水平日粮饲喂时（试验后期），各组生长速度差异显著（Ｐ＜０．０５）．在试验前期，每组各抽５头黑熊（共２０头），平均体重６３．２２±７．７４ｋｇ），采用６天全粪收集法，测定饲料消化率。

Forty growing selenarctos (average initial body weight was 31.20±6.47kg) were divided into 4 groups (10 per group) at random.In the former stage (12 months)and later stage (8 months) of the experiment,the effects of the rations with high nutrition (the contents of crude protein:18.2～25.3%) and the rations with low nutrition (the contents of crude protein:12.9～ 19.9%) on the growth rates of grown selenaretos were studied,respectively.The results showed that when the grown selenarctos were fed with rations of high nutrition,there were no significant differences (P>0.05) in the growth rates of selenarctos among the 4 groups.But when they were fed with rations of low nutrition,the differences were significant (P<0.05).In the former period of the experiment,5 selenarctos (average body weight was 63.22±7.74kg) were selected from each group (the total was 20) and the total collection method in 6 days was used to dertermine the apparent digestability.The result showed the rations with high nutrition had no distinct influence on the apparent digestibility among each group.