Effect of encapsulated Amomum compactum waste extract and Lactobacillus plantarum on immune system, protein digestibility and performance of broiler chicken

Abstract

This study was conducted to evaluate the effects of encapsulated Amomum compactum waste extract and Lactobacillus plantarum in diet on the immune system, protein digestibility, and performance of broiler chickens. There were 200 8-day-old unsexed broilers (Ross 308) with an average initial weight of 217.22 ± 5.58 g were included to the encapsulated Amomum compactum waste extract-Lactobacillus plantarum named EAWE-Lp and assigned to 4 treatments with 5 replicates (10 chicks each). The treatments were T0 basal diet (BD), T1 BD+ EAWE-Lp 0.3%, T2 BD+EAWE-Lp 0.6%, and T3 BD+EAWE-Lp 0.9%. Data were analyzed using analysis of variance (ANOVA) to assess the impact of the treatment, followed by Duncan's multiple range test (DMRT) at 5% significance level. The result indicated that the dietary encapsulated Amomum compactum waste extract and Lactobacillus plantarum influenced (P<0.05) several criteria such as the total count of lactic acid bacteria (LAB), total Coliform, pH of small intestine, the relative weights of the bursa fabricius, spleen, and thymus, the heterophil-to-lymphocyte ratio, protein digestibility, daily feed intake (DFI), daily body weight gain (DBWG), and feed conversion ratio (FCR). The study concludes that addition of encapsulated Amomum compactum waste extract and Lactobacillus plantarum level of 0.6% (T2) in the diet can improve the immune system, protein digestibility, and performance in broiler chickens.