桑叶粉对蛋鸡生产性能和蛋品质的影响

Effects of ground mulberry leaf on production performance and egg quality of layers

本试验旨在研究桑叶粉对蛋鸡生产性能和蛋品质的影响。选取163只412日龄的罗曼粉蛋鸡,随机分成4组,每组12个重复,每个重复3～4只。分别饲以桑叶粉添加量为0、5%、8%和11%的试验日粮。试验期为40 d。试验结果表明:(1)桑叶粉添加组的产蛋率显著低于对照组(不添加组)(P<0.01);5%桑叶粉组的料蛋比显著高于对照组(P<0.05),8%、11%桑叶粉组的料蛋比与对照组的差异不显著(P>0.05);各组间平均日采食量差异不显著(P>0.05)。(2)桑叶粉添加组的蛋黄颜色显著深于对照组(P<0.01),且随着桑叶粉添加量的增加,蛋黄颜色加深;除蛋黄颜色外,各组间其他的鸡蛋物理指标均无显著差异(P>0.05)。(3)各组的蛋黄粗脂肪、粗蛋白质及胆固醇含量差异不显著(P>0.05);各桑叶粉添加组的蛋黄多不饱和脂肪酸(PUFA)、ω-6系脂肪酸的含量显著高于对照组(P<0.05),8%、11%桑叶粉组的蛋黄ω-3系脂肪酸含量显著低于对照组(P<0.01),而各组饱和脂肪酸(SFA)、单不饱和脂肪酸(MUFA)含量差异不显著(P>0.05)。以上结果表明,从开发饲料资源、提高蛋黄色泽和蛋黄中PUFA、ω-6系脂肪酸含量的角度考虑,桑叶粉可在蛋鸡养殖中加以应用。

The experiment was conducted to study the effect of ground mulberry leaf on production performance and egg quality of layers.A total of 163 Roman pink layers aged 412 days were allotted into four treatment groups with 12 replicates and 3 - 4 birds per replicate.Four groups of layers were fed diets supplemented with 0,5 % ,8 % and 11% ground mulberry leaf, respectively.The results showed that adding ground mulberry leaf into the layer diet significantly reduced egg production rate （P 〈 0.01） ,but had no effect on the feed/egg ratio （except the 5 % group） and feed intake （P 〉 0.05）.Diet supplemented with ground mulberry leaf increased yolk color （P 〈 0.01 ）,increased polyunsaturated fatty acids （PUFA） and ω-6 fatty acids （P 〈 0.05） ,decreased ω-3 fatty acids of yolk with 8 % and 11% supplementation （P 〈 0.01 ） ,but had no significant effects on other egg quality indices （P 〉 0.05）.In conclusion,ground mulberry leaf could be used as a feed resource ,especially in improving the egg yolk color and yolk PUFA and ω-6 fatty acid content.