PERFORMANCE, CARCASS AND INTERNAL ORGANS CHARACTERIZES OF BROILER CHICKENS WITH PHYTASE SUPPLEMENTATION FROM Burkholderia sp. Strain HF.7

Feed formulation with phytase supplementation is an innovation in the feed industry to improve monogastric feed quality without increasing production costs. This study aims to determine the carcass weight of broilers and the percentage of internal organs by providing various feeds, including those supplemented with phytase in phytase units (FTU) from Burkholderia sp. strain HF.7. A completely randomized experimental design was used in this study, using 108 broilers for five weeks of maintenance in three treatments with six replicas, each replica consisting of six broilers. The experimental feed given to broilers was basal feed without phytase supplementation (P1), basal feed + 750 FTU phytase (P2) and commercial feed (P3), each with the category of starter phase and finisher phase. Carcass weight and percentage of organs in broilers (liver, heart, gizzard, and lymph) were measured in each treatment unit. The results showed that broilers that consumed phytase supplemented feed had a higher carcass weight with a lower feed conversion value than broilers fed basal feed without phytase. These findings also indicate that the addition of phytase from Burkholderia sp. HF.7 strain at 750 FTU/kg feeds does not interfere with the organs of broilers' physiological function because of no increase in the percentage of the liver, heart, gizzard, and lymph. Keywords: Broiler, Burkholderia, Internal organs, Performance, Phytase. RESEARCH ARTICLE PII: S222877012100009-11 Revised: March 1 Received: February 09, 2021 8,