Poultry Research Institute, Murree Road, Shamsabad, Rawalpindi, Pakistan.
J Anim Physiol Anim Nutr (Berl). 2011 Aug;95(4):523-32. doi: 10.1111/j.1439-0396.2010.01079.x. Epub 2010 Nov 22.
A study was conducted to evaluate four different probiotic levels, using diets supplemented with 0 (control), 0.1%, 0.2%, 0.3% or 0.5% of organic-green culture-zs (probiotic). The cockerels of 6-weeks old were randomly divided into 15 separate floor pens each comprising 25 birds and three pens (replicates) per treatment group following completely randomized design. At 12 weeks of age BW and feed to gain ratio (FCR) were determined. At the end of 42 days of experiment, nine birds per treatment were sacrificed to evaluate carcass characteristics, abdominal fat contents and the internal organs. Blood haemato-biochemical parameters were also determined. Haemagglutination inhibition antibody titres against Newcastle disease virus and lymphoid organs weight/body weight ratio were also determined. The BW of birds fed 0.2-0.5% of probiotic was significantly greater than birds fed without probiotic diet. Similarly, better FCR was observed in birds those fed diets of high level of probiotic. There was no mortality recorded at higher levels of probiotics. Differences in carcass characteristics, organs weight, meat composition, haematological values and HDL and LDL concentrations among all the diets were non-significant. However, abdominal fat contents reduced significantly in supplemented groups in relation to control and cholesterol contents were reduced significantly in 0.3% or 0.5% supplemented groups in relation to control. Feeding levels of 0.2-0.5% of probiotic, did positively affect the immune system within the parameters measured. It may be concluded that performance, blood chemistry and immunity against disease in cockerels could be maintained when supplementing 0.3% or 0.5% level of probiotic incorporated in crossbred cockerel's diets.
一项研究评估了四种不同的益生菌水平，使用添加了 0（对照）、0.1%、0.2%、0.3%或 0.5%有机绿色培养物-zs（益生菌）的饮食。6 周龄的公鸡被随机分为 15 个单独的地板围栏，每个围栏包含 25 只鸡，每个处理组有 3 个围栏（重复），采用完全随机设计。在 12 周龄时，测定体重和饲料增重比（FCR）。在实验的第 42 天结束时，每个处理组宰杀 9 只鸡，以评估胴体特征、腹部脂肪含量和内脏器官。还测定了血液血液生化参数。还测定了针对新城疫病毒的血凝抑制抗体效价和淋巴器官重量/体重比。饲喂 0.2-0.5%益生菌的鸡的体重明显大于未饲喂益生菌日粮的鸡。同样，饲喂高水平益生菌日粮的鸡的 FCR 也更好。在更高水平的益生菌中没有记录到死亡率。所有日粮之间的胴体特征、器官重量、肉质组成、血液值和 HDL 和 LDL 浓度差异均无统计学意义。然而，与对照组相比，添加组的腹部脂肪含量显著降低，胆固醇含量在 0.3%或 0.5%添加组中与对照组相比显著降低。0.2-0.5%益生菌的饲喂水平对所测参数的免疫系统有积极影响。可以得出结论，在杂交公鸡日粮中添加 0.3%或 0.5%水平的益生菌可以维持公鸡的性能、血液化学和对疾病的免疫力。
