Mendes Ana R, Spínola Maria P, Lordelo Madalena, Prates José A M
LEAF-Linking Landscape, Environment, Agriculture and Food Research Center, Associate Laboratory TERRA, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017 Lisboa, Portugal.
CIISA-Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, Av. da Universidade Técnica, 1300-477 Lisboa, Portugal.
Vet Sci. 2024 Jun 28;11(7):290. doi: 10.3390/vetsci11070290.
This systematic review examines the effects of cumulative intake levels on broiler chickens, focusing on growth performance and systemic health markers. The review establishes a clear relationship between cumulative intake and significant outcomes in poultry nutrition and health through a detailed analysis of various studies. The correlation analysis revealed that cumulative intake levels ranging from 0.8 to 718 g/bird influenced growth rates and feed efficiency, following sigmoid models. Specifically, intakes of approximately 20 g/bird maximized final body weight (R = 0.616, < 0.001), cumulative body weight gain (R = 0.627, < 0.001) and daily weight gain (R = 0.639, < 0.001). The feed conversion ratio also improved with increasing intakes up to this level, although this was non-significant (R = 0.289, = 0.117). In addition, similar cumulative intake levels impacted plasma health markers in broilers, leading to reductions in triacylglycerols and cholesterol and improvements in immunoglobulin levels. These findings underscore the importance of carefully calibrated supplementation strategies to optimise poultry growth and health without adverse effects. Future research should focus on refining dosing guidelines and further exploring its long-term effects and mechanisms of action to enhance poultry health and production sustainability.
本系统评价考察了累积摄入量对肉鸡的影响，重点关注生长性能和全身健康指标。通过对各项研究的详细分析，该评价确立了累积摄入量与家禽营养和健康方面显著结果之间的明确关系。相关分析表明，每只鸡累积摄入量在0.8至718克之间时，生长速率和饲料效率受S形模型影响。具体而言，每只鸡摄入约20克时，最终体重（R = 0.616，P < 0.001）、累积体重增加量（R = 0.627，P < 0.001）和日增重（R = 0.639，P < 0.001）达到最大值。在此摄入量水平之前，随着摄入量增加，饲料转化率也有所改善，尽管不显著（R = 0.289，P = 0.117）。此外，类似的累积摄入量水平影响肉鸡的血浆健康指标，导致三酰甘油和胆固醇水平降低，免疫球蛋白水平提高。这些发现强调了精心校准的添加策略对于优化家禽生长和健康且无不良影响的重要性。未来的研究应侧重于完善添加剂量指南，并进一步探索其长期影响和作用机制，以提高家禽健康水平和生产可持续性。
