Effect of exogenous fibrolytic enzymes on digestibility and rumen characteristics in Shami goats

Abdulameer Hassan, Shaker; Abdulrahman Tawffeq, Jamal

	Effect of exogenous fibrolytic enzymes on digestibility and rumen characteristics in Shami goats
Kufa Journal for Agricultural Science
Article 1, Volume 7, Issue 3, 2015, Pages 205-223
Authors
Shaker Abdulameer Hassan; Jamal Abdulrahman Tawffeq
Abstract
Twelve Shami male goats with average weight 43.3±1.2 kg and 3-4 years old were used to study the effect of exogenous fibrolytic enzymes (EFE) either pre–treated barley straw or supplemented with concentrate diet at different levels (0, 2,and 4%) on nutrient digestibility and rumen characteristics. All Shami goats were divided randomly into six groups (2 bucks each). All goats individually fed concentrate diets in a 2×3 factorial experiment according to maintenance requirement at 1% live body weight (LBW) while barley straw was offered ad libitium. The results showed that all nutrients digestibilities were not significantly affected by methods of application, levels of EFE and their interaction. There were numerical increases with increasing levels of EEE on dry matter (DM), organic matter (OM), nitrogen (N), neutral detergent fiber (NDF) and acid detergent fiber (ADF) digestibilities (%). Ruminal pH, ammonia–N, total volatile fatty acids (TVFA) concentrations, percentage of acetate, propionate and butyrate, were also not affected significantly by methods of application, levels of EFE and their interaction. There were numerical increased in TVFA and numerical decreased in NH3-N concentrations as levels of EFE increased. The results of this study indicated that both methods of application EFE may enhance digestibility and rumen fermentation in Shami goats when used higher enzyme levels.
Keywords
Exogenous fibrolytic enzymes; digestibility; rumen fermentation; Shami goats

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