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低磷饲粮添加植酸酶对断奶仔猪生长性能、养分表观消化率和骨骼发育的影响

DOI: 10.3969/j.issn.1006-267x.2015.10.032

Keywords: 植酸酶,低磷饲粮,生长性能,养分表观消化率,骨骼发育

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Abstract:

本试验旨在探究低磷(P)饲粮中不同添加量的植酸酶对断奶仔猪生长性能、养分表观消化率和骨骼发育的影响。试验选用35头21日龄断奶、初始均重为(7.62±0.44)kg的健康"杜×长×大"三元杂交仔猪,随机分为5组,每组7个重复,每个重复1头猪。对照组饲喂基础饲粮,试验组在低磷饲粮[前期:钙(Ca)5.1g/kg,有效磷(AP)2.0g/kg;后期:钙4.6g/kg,有效磷1.6g/kg]中分别添加0、250、500、1000FTU/kg植酸酶,试验期21d。结果表明:1)与对照组相比,添加1000FTU/kg植酸酶显著提高了断奶仔猪第15~21天和第1~21天平均日采食量(ADFI)和平均日增重(ADG)(P<0.05),但对料重比(F/G)无显著影响(P>0.05)。2)与对照组及低磷饲粮组相比,添加植酸酶显著提高了干物质(DM)、有机物(OM)、粗蛋白质(CP)、钙、磷和总能(GE)的表观消化率(P<0.05),且1000FTU/kg各项指标优于其他试验组。3)与对照组相比,添加1000FTU/kg植酸酶显著提高了第3掌骨的骨骼长度(P<0.05)。由此可知,玉米-豆粕饲粮中添加植酸酶能够显著改善断奶仔猪的生长性能,提高养分表观消化率,促进仔猪骨骼的发育,节约饲料经济成本;在本试验条件下,21日龄断奶仔猪饲喂有效磷1.6~2.0g/kg的玉米-豆粕型饲粮时,植酸酶适宜添加量为1000FTU/kg。

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