Effect of Exogenous Fibrolytic Enzymes Supplementation or Functional Feed Additives on In Vitro Ruminal Fermentation of Chemically Pre-Treated Sunflower Heads
chemical composition; chemical pretreatments; digestibility; exogeneous enzymes; feed additive; in vitro; sunflower head; Food Science; Agronomy and Crop Science; Plant Science
Abstract :
[en] This study aims to provide possible utilization of sunflower head byproduct (SFH) as a feedstuff by implementing chemical pretreatments (4% sodium hydroxide (SFHNaOH) or 4% urea (SFHurea) and supplementation with either exogenous fibrolytic enzymes (EFE) or functional feed additive (FFA). The experimental EFE was a complex (1:1, v/v) of two enzyme products with high activity of β-1,3-1,4-glucanase and endo-1,4-β-D-xylanase and applied at 0 (SFHout), 1, 2, 5, and 10 µL/ gdry matter, while FFA was a fermentation byproduct rich in cellulase and xylanase activities, applied at 0 (SFHout), 0.5, 1, 2, and 4 mg/g DM. SFHurea had the highest (p < 0.05) crude protein (CP) content compared to other SFH substrates. Linear enhancements (p < 0.05) in kinetics of gas production (GP), metabolizable energy (ME), organic matter digestibility (OMD) and total short-chain fatty acids (SCFAs) concentrations were observed for all SFH substrates supplemented with EFE. The SFHout had the highest (p < 0.05) potential GP, maximum rate (Rmax) of GP, ME, OMD and SCFAs. Supplementation of EFE was more pronounced than FFA in affecting the kinetic parameters of in vitro GP for all SFH substrates. SFHout supplemented with EFE seems to be the most promising substrate to enhance microbial fermentation in vitro.
Disciplines :
Animal production & animal husbandry
Author, co-author :
Jabri, Jihene; Animal Nutrition Laboratory, Ecole Nationale de Médecine Vétérinaire, Université de la Manouba, Sidi Thabet, Tunisia
Ammar, Hajer; Ecole Supérieure d’Agriculture de Mograne, Zaghouan, Tunisia
Abid, Khalil; Animal Nutrition Laboratory, Ecole Nationale de Médecine Vétérinaire, Université de la Manouba, Sidi Thabet, Tunisia
Beckers, Yves ; Université de Liège - ULiège > Département GxABT > Ingénierie des productions animales et nutrition
Yaich, Héla; Animal Nutrition Laboratory, Ecole Nationale de Médecine Vétérinaire, Université de la Manouba, Sidi Thabet, Tunisia
Malek, Atef; Animal Nutrition Laboratory, Ecole Nationale de Médecine Vétérinaire, Université de la Manouba, Sidi Thabet, Tunisia
Rekhis, Jamel; Animal Nutrition Laboratory, Ecole Nationale de Médecine Vétérinaire, Université de la Manouba, Sidi Thabet, Tunisia
Morsy, Amr Salah ; Livestock Research Department, Arid Lands Cultivation Research Institute, City of Scientific Research and Technological Applications, Alexandria, Egypt
Soltan, Yosra Ahmed; Animal and Fish Production Department, Faculty of Agriculture, Alexandria University, Alexandria, Egypt
Soufan, Walid ; Plant Production Department, College of Food and Agriculture Sciences, King Saud University, Riyadh, Saudi Arabia
Almadani, Mohamad Isam ; Thünen Institute of Farm Economics, Braunschweig, Germany
Chahine, Mireille; Department of Animal, Veterinary and Food Sciences, University of Idaho, Moscow, United States
Marti, Mario E. de Haro; Gooding County Extension, College of Agricultural and Life Sciences, University of Idaho, Gooding, United States
Okla, Mohammad K.; Botany and Microbiology Department, College of Science, King Saud University, Riyadh, Saudi Arabia
Kamoun, Mohamed; Animal Nutrition Laboratory, Ecole Nationale de Médecine Vétérinaire, Université de la Manouba, Sidi Thabet, Tunisia
Effect of Exogenous Fibrolytic Enzymes Supplementation or Functional Feed Additives on In Vitro Ruminal Fermentation of Chemically Pre-Treated Sunflower Heads
Funding: This research was supported by the laboratory of Animal nutrition: Management of the health and quality of animal production [LR14AGR03] (Ministry of Higher Education and Scientific Research, Tunisia), the precision livestock and nutrition unit, Gembloux Agro-Bio Tech, University of Liège and the Researchers Supporting Project number (RSP-2021/390), King Saud University, Riyadh, Saudi Arabia.
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