Belote Bruna L, Soares Igor, Tujimoto-Silva Aline, Tirado Amanda G C, Martins Camila M, Carvalho Bruno, Gonzalez-Esquerra Ricardo, Rangel Luis F S, Santin Elizabeth
Universidade Federal do Parana, Curitiba, Parana, Brazil.
Universidade Federal do Parana, Curitiba, Parana, Brazil.
Poult Sci. 2021 May;100(5):101080. doi: 10.1016/j.psj.2021.101080. Epub 2021 Mar 3.
The effect of feeding spray-dried plasma (SDP) during the starter period was evaluated with a commercial broiler integrator on performance and overall health of broilers. The I See Inside (ISI) methodology assessing gut health in broilers was used as a tool to evaluate the impact of dietary interventions under commercial conditions. One hundred farms with approximately 1.1 million broilers were used at a Brazilian broiler integrator. Two groups of farms were fed either a control or an SDP diet containing 1% SDP, from 0 to 10 d of age. Diets were formulated to have similar nutritional density, containing zinc bacitracin and CuSO from 0 to 28 d. After 10 d, both groups were fed common commercial diets. Performance data were analyzed together or by type of ventilation system: positive pressure or negative pressure. Birds were sent to market as they reached 3.05 kg; therefore, age at slaughter (AS) was evaluated as a dependent variable along with other performance measures. From the 100 farms in the trial, 35 (16 control and 19 SDP farms) were selected for the assessment of broilers health, biosecurity, and local management. For that, 6 broilers per farm at 14 ± 2 d of age were necropsied and ileum sampled for the ISI methodology evaluation. Biosecurity and management were also evaluated to obtain the influence of those parameters on animal health. SDP-fed birds demonstrated improved feed conversion ratio, reduced mortality, and 1 d less for AS (P < 0.05) vs. control group (P < 0.05) regardless of the type of ventilation. During necropsy, birds fed SDP showed lower coccidiosis and locomotor system lesions as the overall ISI score compared to controls. Histologic intestinal alterations were also lower in SDP-fed broilers (P < 0.05). In conclusion, feeding 1% SDP in the starter period to broilers resulted in improved performance and health under both good and bad management and biosecurity standards independent of the type of ventilation. Overall, there was good agreement between the ISI method and performance improvements observed.
一家商业肉鸡综合企业评估了在肉鸡育雏期饲喂喷雾干燥血浆（SDP）对肉鸡生产性能和整体健康状况的影响。采用“透视内部”（ISI）方法评估肉鸡肠道健康状况，以此作为评估商业条件下日粮干预措施影响的工具。巴西一家肉鸡综合企业使用了100个农场，约110万只肉鸡。两组农场在0至10日龄期间，分别饲喂对照日粮或含1% SDP的日粮。日粮配方设计为具有相似的营养密度，在0至28日龄期间含有杆菌肽锌和硫酸铜。10天后，两组均饲喂普通商业日粮。生产性能数据按通风系统类型（正压或负压）一起分析或分别分析。肉鸡达到3.05千克时送往市场；因此，屠宰日龄（AS）与其他生产性能指标一起作为因变量进行评估。从试验的100个农场中，挑选了35个（16个对照农场和19个SDP农场）评估肉鸡健康状况、生物安全和当地管理情况。为此，每个农场在14±2日龄时选取6只肉鸡进行剖检，并采集回肠样本用于ISI方法评估。同时评估生物安全和管理情况，以了解这些参数对动物健康的影响。无论通风类型如何，与对照组相比，饲喂SDP的肉鸡饲料转化率提高、死亡率降低，屠宰日龄提前1天（P<0.05）。剖检时，与对照组相比，饲喂SDP的肉鸡球虫病和运动系统病变较少，整体ISI评分较低。饲喂SDP的肉鸡组织学肠道病变也较少（P<0.05）。总之，在育雏期给肉鸡饲喂1% SDP，无论管理和生物安全标准好坏，且与通风类型无关，均能提高生产性能和健康水平。总体而言，ISI方法与观察到的生产性能改善之间具有良好的一致性。
