发酵饲料桑粉对宁乡花猪生长性能、肉品质和血清生化指标的影响

摘要

This study was aimed to investigate the effects of fermented feed mulberry powder on growth per-formance, meat quality and serum biochemical indexes of Ningxiang pigs. Ninety Ningxiang pigs with average body weight of about 30 kg were randomly divided into 5 groups with 3 replicates(pens)per group and 6 pigs per replicate. Pigs in control group were fed a basal diet,and the others in groupsⅠ,Ⅱ,Ⅲ andⅣ were fed the fermented diets supplemented with 9%, 12% and 15% feed mulberry powder and the unfermented diets supplemented with 9% feed mulberry powder. The trial was divided into 2 stages, 1 to 50 days of earlier growth stage and 51 to 75 days of later growth stage. The results showed as follows: 1)the ratio of feed to gain of Ningxiang pigs in groupⅠwas significantly lower than that in control group and groupⅣfrom 1 to 50 days(P<0.05). 2)Compared with control group, the average backfat thickness of Ningxiang pigs in groupsⅠ, Ⅱ, ⅢandⅣwas significantly decreased(P<0.05). 3)Compared with control group,the content of to-tal cholesterol in serum of Ningxiang pigs in groupsⅠ,Ⅱ,ⅢandⅣwas significantly decreased(P<0.05). The content of total protein in serum of Ningxiang pigs in groupⅠat the 50thday was significantly higher than that in group Ⅳ(P<0.05). In conclusion,feed mulberry powder has better feeding effects after fermented,it is able to reduce average backfat thickness of Ningxiang pigs, improve meat quality and reduce the content of total cholesterol in serum. The fermented diets supplemented with 9% feed mulberry powder can decrease the ratio of feed to gain,and promote the growth performance of Ningxiang pigs.%本试验旨在研究将饲料桑粉添加至饲粮中经发酵后饲喂宁乡花猪,对其生长性能、肉品质和血清生化指标的影响.选取平均体重为30 kg左右的宁乡花猪90头,随机分为5个组,每组3个重复(栏),每个重复6头猪.对照组饲喂基础饲粮,Ⅰ、Ⅱ、Ⅲ和Ⅳ组分别饲喂添加9%、12%、15%饲料桑粉的全发酵料和添加9%饲料桑粉的未发酵料.试验分为2个阶段,中猪阶段(1~50 d)和大猪阶段(51~75 d).结果表明:1)Ⅰ组宁乡花猪1~50 d的料重比显著低于对照组和Ⅳ组(P<0.05).2)与对照组相比,Ⅰ、Ⅱ、Ⅲ和Ⅳ组宁乡花猪的平均背膘厚显著降低(P<0.05).3)与对照组相比,Ⅰ、Ⅱ、Ⅲ和Ⅳ组宁乡花猪的血清总胆固醇含量显著降低(P<0.05);Ⅰ组宁乡花猪第50天的血清总蛋白含量显著高于Ⅳ组(P<0.05).由此可知,饲料桑粉经发酵后饲喂效果更佳,可降低宁乡花猪的平均背膘厚,改善肉品质,降低血清总胆固醇含量;添加9%饲料桑粉的全发酵料可降低料重比,改善宁乡花猪的生长性能.