选取6头体重(35±1) kg、健康去势的鲁烟白猪,采用有重复的6×6拉丁方设计进行消化试验,试验饲粮为玉米和玉米-小麦饲粮,对照组不添加淀粉酶,试验组分别添加0.1%单酶C和0.1%复合酶,研究复合淀粉酶对鲁烟白猪不同淀粉来源饲粮养分消化率和氮平衡的影响. 结果表明,单酶C和复合淀粉酶都能提高鲁烟白猪饲粮养分消化率和对氮的利用率,但复合酶的效果好于单酶. 在玉米、玉米-小麦饲粮中添加复合淀粉酶对鲁烟白猪干物质、粗蛋白质和有机物消化率分别比对照组提高3.82个百分点、0.41个百分点、3.36个百分点和4.79个百分点、1.16个百分点、4.05个百分点(P<0.01);氮表观消化率、氮生物学价值和蛋白质净利用率分别提高2.86个百分点、1.60个百分点、2.47个百分点,3.08个百分点、2.33个百分点、2.70个百分点(P<0.05);与添加单酶C相比,在两种饲粮中添加复合淀粉酶时,鲁烟白猪干物质、粗蛋白质和有机物消化率分别提高1.39个百分点、0.14个百分点、0.65个百分点,1.61个百分点、0.49个百分点、2.63个百分点(P>0.05); 氮表观消化率、 氮生物学价值和蛋白质净利用率分别提高1.14个百分点、0.55个百分点、0.92个百分点,1.45个百分点、0.72个百分点、0.71个百分点(P>0.05);并且玉米-小麦型饲粮中加入复合淀粉酶对饲粮养分消化率的改善效果优于玉米型饲粮.%Six similar weight (35±1) kg,healthy and casteated growing pigs of Lu-Yan White pigs was selected. Then these pigs were divided into two groups,their diets have different starch source,corn and corn-wheat.The diets of which group were managed 3 situation,no amylase,single amylase,complex amylase.This experiment was completed through the way of 6 ×6 latin square design. The results show that,the nutrient digestibility and nitrogen utilization of Lu-Yan white pigs increased,when adding the composite amylase to the diet that has different sources of starch,and it's better to add single amylase.Compared with the blank group,the dry matter digestibility,crude protein digestibility and organic matter digestibility of experimental group adding the composite amylase in the diet of corn and corn-wheat increased by 3.82,0.41,3.36,4.79,1.16,4.05 percent(P<0.01);nitrogen apparent digestibility,nitrogen biological value and protein utilization increased by 2.86, 1.60, 2.47, 3.08, 2.33, 2.70 percent (P<0.05);compared with the single amylase group,the project of nutrient digestibility and nitrogen balance increased by 1.39, 0.14, 0.65, 1.61, 0.49, 2.63 percent (P>0.05);1.14, 0.55, 0.92, 1.45, 0.72, 0.71 percent (P>0.05);and the effect of adding amylase in the diet of corn-wheat was better than adding amylase in the diet of core.
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