Resumo

GAIBOR, Jimmy Quisirumbay et al. Suplementación alimenticia de glutamina sobre el desempeño productivo en pollos de engorde. Siembra [online]. 2019, vol.6, n.2, pp.15-24. ISSN 2477-8850.  https://doi.org/10.29166/siembra.v6i2.1622.

The objective of this research was to evaluate the effect size of glutamine supplementation on the productive performance of broiler chickens, the consistency of their effect and the influence of other factors through the use of meta-analysis. It was found that glutamine supplementation favors the use of nutrients reflected in lower values of feed conversion (calculated with weight gain) 1,484 versus 1,518, and an average effect size of -0,031 (difference of means) (p = 0,00005). Control chickens require an additional 31 g of feed to produce 1 kg of weight gain compared to the group that did receive the amino acid under study. When the variable analyzed was feed conversion (calculated with live weight) (1,468 vs 1,478), it was determined that chickens without glutamine require an additional 15 g of feed to produce 1 kg of live weight (difference of means = -0,015; p = 0.00001). No consistent effect was found between the studies carried out, with high values in the inconsistency test, 100% and 81.6% for the two forms of feed conversion. The meta-regressions indicate that factors related to the design of the experiment or certain nutrient levels have an impact on the variable under study. It is concluded that glutamine supplementation favors the productive performance in broiler chickens. However, the design of the study and the formulation of the diet should be considered.

Palavras-chave : nutrition; feeding; birds; amino acids; feed conversion.

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