Effects of encapsulated sodium butyrate and phytogenic on growth performance, carcass traits and health of growing-finishing pigs

ABSTRACT: The aim of this study was to evaluate two feed additives, one based on encapsulated sodium butyrate (Adimix® Precision) (AD) and the other, a phytogenic (Apex® 5) (AX), associated or not with an antimicrobial growth promoter (tylosin) during the growth and finishing phases on performance, carcass characteristics and health conditions. A total of 300 barrows and females were distributed in six treatments in a randomized block design with ten replicates. The treatments consisted of a negative control (NC), positive control (PC) (tylosin), AD (encapsulated sodium butyrate), AX (phytogenic), PC+AD (tylosin+encapsulated sodium butyrate), and PC+AX (tylosin+phytogenic). The performance (live weight, daily feed intake, average daily gain and feed conversion) and carcass data (carcass weight, backfat thickness, loin depth, lean meat on the carcass) were submitted to ANOVA plus Tukey’s test, and the health conditions (occurrence of diseases, culling, and spontaneous deaths) were analyzed by χ2. Animals of the AD group had the highest average daily gain (ADG) over the evaluation period and the highest live weight at 120, 140, and 164 days of age, in addition to the highest carcass weight compared to NC and PC groups. The AX treatment increased the ADG in growth phase II and the live weight at 120 and 140 days of age in relation to the NC. The PC+AX group had a higher final live weight compared to the NC and PC groups and higher carcass weight in relation to the NC group. There was no difference among treatments for backfat thickness, percentage of lean meat in the carcass, or occurrence of diseases and deaths. The inclusion of encapsulated sodium butyrate (AD treatment) was effective in increasing ADG, final live weight, and carcass weight compared to supplementation with tylosin (PC treatment), as was the inclusion of a phytogenic (AX treatment) on FC compared to the PC.

摘要：本研究旨在评估两种饲料添加剂——一种为包被丁酸钠（encapsulated sodium butyrate）制剂Adimix® Precision（以下简称AD），另一种为植物源（phytogenic）制剂Apex® 5（以下简称AX）——分别联合或不联合抗菌生长促进剂泰乐菌素（tylosin），在育肥猪生长与育肥阶段对其生产性能、胴体性状及健康状况的影响。试验共选取300头阉公猪与母猪，采用随机区组设计（randomized block design）分为6个处理组，每组设置10个重复。6个处理组分别为：阴性对照组（NC）、阳性对照组（PC，添加泰乐菌素）、AD组（包被丁酸钠制剂）、AX组（植物源制剂）、PC+AD组（泰乐菌素+包被丁酸钠制剂）以及PC+AX组（泰乐菌素+植物源制剂）。对生产性能指标（活体重、日采食量、平均日增重（average daily gain, ADG）及料重比）与胴体指标（胴体重、背膘厚度、眼肌深度、胴体瘦肉率）采用方差分析（ANOVA）结合Tukey检验（Tukey’s test）进行统计分析；对健康状况指标（疾病发生情况、淘汰率及自发性死亡情况）采用卡方检验（χ²）进行分析。试验期间，AD组猪只的平均日增重最高，且在120、140及164日龄时的活体重均为各组最高，同时胴体重显著高于NC组与PC组。AX组在生长第二阶段的平均日增重显著高于NC组，且120、140日龄时的活体重亦显著优于NC组。PC+AX组的最终活体重显著高于NC组与PC组，胴体重显著高于NC组。各组间背膘厚度、胴体瘦肉率以及疾病与死亡发生情况均无显著差异。与仅添加泰乐菌素的PC组相比，添加包被丁酸钠的AD组可有效提升平均日增重、最终活体重及胴体重；与PC组相比，添加植物源制剂的AX组可有效改善料重比。