Processed false yam seed meals in broiler chicken diets: effects on feed preference and apparent nutrient digestibility

• Published in: Tropical animal health and production 2020-11, Vol.52 (6), p.3621-3629
• Main Authors: Mohammed, A., Dei, H. K., Wesseh, A., Roessler, R., Schlecht, E.
• Format: Article
• Language: English
• Subjects: Animal Feed - analysis; Animal Nutritional Physiological Phenomena; Animals; Biomedical and Life Sciences; Birds; Chemical treatment; Chickens - physiology; Chicks; Corn; Diet; Diet - veterinary; Dietary Supplements - analysis; Digestibility; Digestion; Dose-Response Relationship, Drug; Dry matter; Feeds; Food Preferences; Icacina senegalensis; Juveniles; Life Sciences; Magnoliopsida - chemistry; Meals; Nutrients; Nutrients - physiology; Physical growth; Potassium hydroxide; Potassium hydroxides; Poultry; Random Allocation; Regular Articles; Seeds; Seeds - chemistry; Sodium chloride; Sodium hydroxide; Urea; Veterinary Medicine/Veterinary Science; Zoology
• ISSN: 0049-4747; 1573-7438
• DOI: 10.1007/s11250-020-02399-z

This study evaluated feed preference and apparent nutrient digestibility of a maize-based diet and modified diets containing treated false yam seed meals (TFYSM). False yam seeds were sun-dried (Un_T), or first soaked in water and treated with one of the following: urea (Urea_T), sodium chloride (NaCl_T), sodium hydroxide (NaOH_T), or potassium hydroxide (KOH_T) and blanched. The TFYSM replaced maize (wt/wt) in experimental diets at 5, 10, 15, 20, 25, 30, 35, 40, 45, and 50%, respectively in a feed preference test (experiment 1). In that study, feed preference test was conducted with 6 × 4 broiler chicks aged 21 days in a randomized complete design; each level of each TFYSM was fed for 24 h and feed intake recorded. In experiment 2 of the study, apparent nutrient digestibility of TFYSM-based diets was evaluated for 15 days with 4-week-old chicks allocated to 5 groups of 20 birds which were further subdivided into 5 treatment groups of 4 birds (replicates) using the inclusion levels of 10, 20, 30, 40, and 50% respectively. The preference test data indicated that feed intake was not compromised when maize was substituted by NaCl_T, NaOH_T, Urea_T, and KOH_T FYSM at all levels, and Un_T FYSM up to 5% inclusion. Dry matter digestibility was generally high (> 75%) in all diets except for Un_T. Control diet and NaOH_T diets had similar CP digestibility, but higher than KOH_T diets, while Un_T diets had reduced CP digestibility. Digestibility of NFE ranged from (77.4%) (Un_T) to (93.8%) (KOH_T). Improving apparent nutrient digestibility of FYSM by sequential use of water-based and chemical treatment methods especially NaOH_T or KOH_T offers the potential to use this alternative feedstuff in broiler diets.