Dietary effects of commercial multi-enzymes on production performance, coloric efficiency, fecal scores, and carcass quality of boiler chickens

Date

2019

Adviser

Precious Jewel D. Dela Cruz

Abstract

In order to determine the effects of two commercially available multi-enzymes on the production performance, caloric efficiency, fecal scores, and carcass quality, 432 straight-run day-old Cobb 500 chicks were randomly divided into 6 treatments consisting of 6 replicates each and 12 birds per replicate. Birds were blocked by initial weight and were randomly allotted to 1 of 6 experimental treatments using a randomized complete block design (RCBD). The 6 dietary treatments are Tl: corn diet (Positive Control 1); T2: corn-wheat diet (Positive Control 2); T3: T1 with reduced ME, AA, Ca, and P (Negative Control 1); T4: T2 with reduced ME, AA, Ca, and P (Negative Control 2); T5: T3 + 750 g/ton of multi-enzyme A; and T6: T4 + 400 g/ton multi-enzyme B. Excreta quality score of each treatment was assessed visually on day 7, 14, 21, and 28. At day 34, two chickens were randomly selected from each replicate to examine the broilers' carcass characteristics. Results showed that both multi-enzyme A and multi-enzyme B have no effect on the production performance and fecal scores of broiler chickens (p-value=0.001). However, there was a significant difference in the caloric efficiency (p-value=0.002). The dietary treatment with multi-enzyme A (T5) yielded the highest caloric efficiency among all six treatments. Significant differences were also observed on the carcass quality of the birds (p-value=0.0005). Abdominal fat weight was highest on the broiler chickens fed with multi-enzyme B supplementation while the birds fed with diet containing multi-enzyme A produced the highest gizzard yield. Under the conditions for which this study was conducted, it is concluded that supplementation of multi-enzymes do not improve broiler's growth performance, fecal scores, caloric efficiency, carcass quality, and economic viability.

Language

English

LC Subject

Capstone

Location

University of the Philippines Rural High School

Document Type

Capstone

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