Zaikina Anastasiya S, Buryakov Nikolai P, Buryakova Maria A, Zagarin Artem Yu, Razhev Artem A, Aleshin Dmitrii E
Department of Feeding Animals, Institute of Animal Science and Biology, Russian State Agrarian University-Moscow Timiryazev Agricultural Academy, 127434 Moscow, Russia.
Vet Sci. 2022 Dec 3;9(12):672. doi: 10.3390/vetsci9120672.
To determine the level of application and the effectiveness of the use of plant feed additives from sweet chestnut wood extract () in the diet of Cobb-500 cross broiler chickens, four groups were formed via the balanced groups method. The chickens in the experimental groups were supplemented with sweet chestnut wood extract in the main diet rather than a feed antibiotic at an amount of 500 g per ton of compound starter feed and 250 g per ton of grower and finisher in the second experimental group; 650 g per ton of compound starter feed and 325 g per ton of grower and finisher in the third experimental group; and 800 g per ton of compound starter feed and 400 g per ton of grower and finisher in the fourth experimental group. Supplementation with phytobiotics led to an increase in the digestibility of the dry matter in the second and third groups compared to the first experimental group. Furthermore, broiler chickens supplemented with a medium dose of phytobiotics revealed a significant difference in both crude protein and fiber when compared to the second experimental group (91.95% and 12.11% vs. 88.98% and 10.07%, respectively). The preslaughter weight of the birds in the phytobiotics supplemented groups was higher than in those fed with the lowest dosage of phytobiotic by 5.47%, and the difference was significant. There were no significant differences in terms of the blood biochemical parameters between the groups. In summary, the inclusion of plant feed additives from sweet chestnut wood extract as a substitute for an antibacterial drug in the diet of broiler chickens did not deteriorate the blood biochemical parameters and improved the intensity of the nutrient digestion process. As a result, it enhanced the quality indicators of the broiler carcass during the entire growth period.
为了确定在科宝500杂交肉鸡日粮中使用欧洲栗木提取物植物饲料添加剂的应用水平和效果，通过平衡分组法组建了四组。实验组的鸡在主要日粮中添加欧洲栗木提取物，而非饲料抗生素，第二实验组每吨复合起始料添加量为500克，生长肥育期每吨添加250克；第三实验组每吨复合起始料添加650克，生长肥育期每吨添加325克；第四实验组每吨复合起始料添加800克，生长肥育期每吨添加400克。与第一实验组相比，添加植物生物活性物质使第二组和第三组的干物质消化率提高。此外，与第二实验组相比，添加中等剂量植物生物活性物质的肉鸡在粗蛋白和纤维方面均有显著差异（分别为91.95%和12.11%，而第二实验组为88.98%和10.07%）。添加植物生物活性物质组的鸡宰前体重比最低剂量组高5.47%，差异显著。各组间血液生化参数无显著差异。总之，在肉鸡日粮中添加欧洲栗木提取物植物饲料添加剂作为抗菌药物的替代品，不会使血液生化参数恶化，反而提高了营养物质消化过程的强度。因此，在整个生长期间提高了肉鸡胴体的质量指标。
