Equações de predição para consumo de nutrientes e desempenho de leitões em função da ingestão e período de suplementação de lactose

Abstract

Early weaning is a critical stage in the life of piglets, and it is essential to consume more digestible nutrients that help to overcome this stage, ensuring better performance. Thus, the objective was to adjust linear regression equations with the effects of lactose intake and days of supplementation to predict nutrient intake and performance of weaned piglets. For this, the methodology of meta-analysis was used with available research data. The database used was produced from published scientific articles (2002-2021), the articles that used diets for piglets containing lactose in their composition were chosen, so 20 publications were selected, 24 diets, 749 piglets with initial weight of 6 .11 kg ± 0.69 and age of 20.79 ± 0.72 days of life. The consumption of lactose in the studies ranged from 7.62 to 90.58 g/day, with a mean consumption of 42.86 g/day, and the days of supplementation of 15.25 ± 2.80. According to the results, the equations: Y = -0.06 + INT. LAC (0.001608) + DS (0.0233); Y = -1.933 + INT. LAC (0.00173) + DS (0.446); Y = -228.6 + INT. LAC (0.867) + DS (86.59) and Y = 0.0742 + INT. LAC (0.0007) + DS (0.009), can be used to respectively predict feed intake (kg/day)(R2=0.59 P=0.001), lysine intake (g/day)(R2=0 .57 P=0.002), consumption of metabolizable energy (Mcal/day)(R2=0.57 P=0.002) and weight gain (kg/day)(R2=0.37 P=0.0104) according to lactose consumption and days of supplementation for each rearing system.