Abstract
TM ) on the performance and carcass quality of broiler chickens. A 4 × 2 factorial arrangement of treatments comprising 4 dietary DTP levels (0, 8, 16 and 24%) with and without enzyme supplementation was used. Each diet was fed to 4 replicates pens of 8 broiler chicks from 1 to 42 days posthatch as a coarse mash. The addition of DTP up to 16% to broiler diets did not significantly affect feed intake (FI), body weight gain (BWG) and feed conversion ratio (FCR) during starter (1 to 21 days), growing (22 to 42 days) and entire experimental (1 to 42 days) periods. Inclusion of 24% DTP into the diet significantly decreased FI at starter and entire experimental periods. Also, inclusion of 24% DTP into the diets significantly decreased BWG and increased FCR at all periods. Birds fed the diets supplemented with Rovabio Excel TM had significantly higher BWG during the starter and entire experimental periods. No significant effect of enzyme addition was observed on FI and FCR. The dietary treatments with or without enzyme did not significantly affect mortality. The 8% DTP-fed group had comparable carcass weight, carcass yield, yield of breast, thigh, abdominal fat, heart, liver and gizzard with those of control group. The higher levels of DTP significantly decreased carcass weight and yield, yield of breast and thigh when compared to the control group. Enzyme supplementation significantly increased carcass weight and yield of abdominal fat. No significant interactions between the DTP and enzyme were observed for performance parameters and carcass characteristics. These results demonstrate that supplementation of DTP up to 8% to broiler diets had no significant adverse effects on performance parameters and carcass characteristics. The enzyme had a significant effect on BWG, carcass weight and yield of abdominal fat.
Highlights
Dried tomato pomace (DTP) as a by-product of tomato processing consists of peels, cores, seeds, trimmings, Abbreviations: dried tomato pomace (DTP), Dried tomato pomace; FI, feed intake; BWG, body weight gain; FCR, feed conversion ratio.liquor and unprocessed green tomatoes picked by harvest machinery
These results demonstrate that supplementation of DTP up to 8% to broiler diets had no significant adverse effects on performance parameters and carcass characteristics
The supplementation of DTP to broiler diets up to 16% had no significant effects on FI, BWG and FCR during the starter, growing and entire experimental periods
Summary
Dried tomato pomace (DTP) as a by-product of tomato processing consists of peels, cores, seeds, trimmings,. Persia et al (2003) substituted tomato seeds (TS) for corn and soybean meal on an equal true digestible amino acid and TMEn basis at 5, 10, 15 and 20% in broiler diets. They observed that inclusion of TS at 20% had significant negative effects on weight gain and feed efficiency of broilers. Supplementation of Rovabio ExcelTM has been shown to improve final live weight and caloric efficiency of broilers fed normal or low energy corn-soybean based diet, respectively (Sims et al, 2001). The possible influence of Rovabio ExcelTM supplementation on utilization of DTP was studied
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