Department of Animal Science, University for Development Studies, P.O. Box TL 1882, Tamale, Ghana.
University of Kassel and Georg-August-Universität Göttingen, Animal Husbandry in the Tropics and Subtropics, Steinstr. 19, 37213, Witzenhausen, Germany.
Trop Anim Health Prod. 2020 Nov;52(6):3621-3629. doi: 10.1007/s11250-020-02399-z. Epub 2020 Sep 18.
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.
本研究评估了基于玉米的饲料和含有处理后的假薯蓣种子粉（TFYSM）的改良饲料的饲料偏好和表观养分消化率。假薯蓣种子经晒干（Un_T），或先用水浸泡，然后用以下一种物质处理：尿素（Urea_T）、氯化钠（NaCl_T）、氢氧化钠（NaOH_T）或氢氧化钾（KOH_T），然后烫漂。在饲料偏好试验（试验 1）中，TFYSM 分别以 5、10、15、20、25、30、35、40、45 和 50%（wt/wt）替代实验日粮中的玉米。在该研究中，21 日龄的 6×4 只肉鸡在随机完全设计中进行了饲料偏好试验；TFYSM 的每个水平饲喂 24 小时，并记录采食量。在该研究的试验 2 中，用 4 周龄的小鸡进行了 15 天的 TFYSM 基础日粮的表观养分消化率评估，将小鸡分为 5 组，每组 20 只，进一步分为 5 个处理组，每组 4 只（重复），分别用 10、20、30、40 和 50%的水平添加。偏好试验数据表明，当用 NaCl_T、NaOH_T、Urea_T 和 KOH_T FYSM 替代所有水平的玉米，以及 Un_T FYSM 替代 5%时，饲料摄入量没有受到影响。除了 Un_T 之外，所有日粮的干物质消化率都很高（>75%）。对照日粮和 NaOH_T 日粮的 CP 消化率相似，但高于 KOH_T 日粮，而 Un_T 日粮的 CP 消化率降低。NFE 的消化率范围从（77.4%）（Un_T）到（93.8%）（KOH_T）。通过顺序使用水基和化学处理方法，特别是 NaOH_T 或 KOH_T，提高 FYSM 的表观养分消化率，为在肉鸡日粮中使用这种替代饲料提供了潜力。
