Kazakova Tatiana, Marshinskaia Olga
Federal Research Center of Biological Systems and Agrotechnologies of the Russian Academy of Sciences, Orenburg, Russia.
Vet World. 2023 Nov;16(11):2358-2365. doi: 10.14202/vetworld.2023.2358-2365. Epub 2023 Nov 27.
An increase in the productivity of broiler chickens is possible when creating an optimal food base that provides birds with all of the nutrients and biologically active substances required for the fullest realization of their genetic potential. In this regard, we examined the effects of the addition of a water-based probiotic and a chelated form of chromium (Cr) to the diet of birds.
Sixty 14-day-old male Arbor Acres broilers were used in this study. The birds were assigned to two groups of 30 birds according to their body weights. The control broilers received distilled water with the basal diet, and the experimental group received a probiotic preparation in drinking water and Cr methionine chelate (Cr-Met) in the diet. The feeding period lasted 28 days. Growth performance indices were measured throughout the experiment. At the end of the experiment, blood sampling was performed to assess blood biochemical parameters, antioxidant system indicators, and trace elements.
We found that the introduction of a probiotic preparation and a chelated form of Cr into the diet of broiler chickens had a positive effect on meat productivity, which was characterized by a 17% increase in the average daily gain of birds (p = 0.05) and a 14% increase in body weight (p = 0.01). Consequently, the yield of the slaughtered carcass increased by 5.8% (p = 0.05). Against the background of the consumption of the developed diet, broiler chickens exhibited a 14% decrease in feed conversion accompanied by an increase in the level of digestibility of dietary nutrients. In addition, glucose levels were decreased by 20% (p = 0.03) against the background of a 76% increase in the total protein concentration (p = 0.01). Superoxide dismutase and glutathione peroxidase activities were increased by 13% (p = 0.02) and 7.5% (p = 0.03), respectively. Elemental analysis of blood serum revealed a 99% decrease in the Fe level versus the control (p = 0.02) and a 31% increase in the Zn level (p = 0.02).
We conclude that feeding broiler chickens is a multicomponent probiotic supplement combined with Cr-Met promotes growth and nutrient absorption, and optimizes metabolic processes.
当建立一个能为肉鸡提供充分发挥其遗传潜力所需的所有营养物质和生物活性物质的最佳食物基础时，提高肉鸡的生产性能是有可能的。在这方面，我们研究了在鸡的日粮中添加水基益生菌和螯合形式的铬（Cr）的效果。
本研究使用了60只14日龄的雄性爱拔益加肉鸡。根据体重将鸡分为两组，每组30只。对照组肉鸡饮用蒸馏水并采食基础日粮，实验组肉鸡在饮水中添加益生菌制剂，日粮中添加蛋氨酸铬螯合物（Cr-Met）。饲养期持续28天。在整个实验过程中测量生长性能指标。实验结束时，进行采血以评估血液生化参数、抗氧化系统指标和微量元素。
我们发现，在肉鸡日粮中添加益生菌制剂和螯合形式的铬对肉用生产性能有积极影响，其表现为鸡的平均日增重提高了17%（p = 0.05），体重增加了（p = 0.01）。因此，屠宰胴体产量提高了5.8%（p = 0.05）。在采食所配制日粮的背景下，肉鸡的饲料转化率降低了14%，同时日粮营养物质的消化率提高。此外，在总蛋白浓度增加76%（p = 0.01）的背景下，葡萄糖水平降低了20%（p = 0.03）。超氧化物歧化酶和谷胱甘肽过氧化物酶活性分别提高了13%（p = 0.02）和7.5%（p = 0.03）。血清元素分析显示，与对照组相比，铁水平降低了99%（p = 0.02），锌水平提高了31%（p = 0.02）。
我们得出结论，给肉鸡饲喂一种多成分益生菌补充剂并结合Cr-Met可促进生长和营养吸收，并优化代谢过程。
