<abstract xmlns="http://www.w3.org/1999/xhtml">

This study aimed to investigate the effects of feed intake of humic substances (HS) on the cellulolytic and amylolytic activities, and the digestibility of dry matter (DM) in the chymus of the intestine and ileum of broiler chickens (Cobb 500). Four groups of birds (A, B, C, negative control; n = 120) were fed with mash diets (starter HYD1 230.20, grower HYD2 222.20, finisher HYD3 209.40 g crude protein (CP) per kg of DM) with the added HS from day 1 to 37 days as follows: A ‒ 0.7 % Humac nature; B ‒ 0.7 % Humac nature monogastric (HNM); C ‒ 0.5 % HNM (Humac Ltd., Slovakia). The cellulolytic activities were increased in the intestine in B/C by 2.50 (P &lt; 0.01)/1.65 (P &lt; 0.05) on day 3 and 1.02 (P &lt; 0.001)/0.3 (P &lt; 0.05) µmol.l−1.min−1.g−1 on day 24. There were observed higher values of digestibility coefficient of DM in the intestine (P &lt; 0.05) in C by 15.14 % and 14.85 %, and in B by 20.73 % on days 17, 24 and 31, respectively. The enhancement of ileal digestibility of DM was observed in B by 7.38 % (P &lt; 0.05) and CP in A and B by 3.7% and 6.1% (P &lt; 0.05). The feed intake of HS favourably influenced the cellulolytic activities and increased the DM digestibility in the intestine and the ileum, as well as the CP digestibility in the ileum.
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This study aimed to investigate the effects of feed intake of humic substances (HS) on the cellulolytic and amylolytic activities, and the digestibility of dry matter (DM) in the chymus of the intestine and ileum of broiler chickens (Cobb 500). Four groups of birds (A, B, C, negative control; n = 120) were fed with mash diets (starter HYD1 230.20, grower HYD2 222.20, finisher HYD3 209.40 g crude protein (CP) per kg of DM) with the added HS from day 1 to 37 days as follows: A ‒ 0.7 % Humac nature; B ‒ 0.7 % Humac nature monogastric (HNM); C ‒ 0.5 % HNM (Humac Ltd., Slovakia). The cellulolytic activities were increased in the intestine in B/C by 2.50 (P < 0.01)/1.65 (P < 0.05) on day 3 and 1.02 (P < 0.001)/0.3 (P < 0.05) µmol.l−1.min−1.g−1 on day 24. There were observed higher values of digestibility coefficient of DM in the intestine (P < 0.05) in C by 15.14 % and 14.85 %, and in B by 20.73 % on days 17, 24 and 31, respectively. The enhancement of ileal digestibility of DM was observed in B by 7.38 % (P < 0.05) and CP in A and B by 3.7% and 6.1% (P < 0.05). The feed intake of HS favourably influenced the cellulolytic activities and increased the DM digestibility in the intestine and the ileum, as well as the CP digestibility in the ileum.

Amylolytic and Cellulolytic Activities, the Digestibility of Dry Matter of Broiler Chickens After Feed Intake of Humic Substances

Department of Animal Nutrition and Husbandry

University of Veterinary Medicine and Pharmacy in Košice

Folia Veterinaria

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

This study aimed to investigate the effects of feed intake of humic substances (HS) on the cellulolytic and amylolytic activities, and the digestibility of dry...

Amylolytic and Cellulolytic Activities, the Digestibility of Dry Matter of Broiler Chickens After Feed Intake of Humic Substances

Published Online: Mar 19, 2023

Page range: 15 - 23

Received: Oct 23, 2022

Accepted: Nov 27, 2022

DOI: https://doi.org/10.2478/fv-2023-0002

Keywords
crude protein, dry matter, humates, intestinal digestibility, poultry nutrition

© 2023 A. Marcin et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Amylolytic and Cellulolytic Activities, the Digestibility of Dry Matter of Broiler Chickens After Feed Intake of Humic Substances

Published Online: Mar 19, 2023

Page range: 15 - 23

Received: Oct 23, 2022

Accepted: Nov 27, 2022

DOI: https://doi.org/10.2478/fv-2023-0002

Keywordscrude protein, dry matter, humates, intestinal digestibility, poultry nutrition

© 2023 A. Marcin et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
crude protein, dry matter, humates, intestinal digestibility, poultry nutrition