Burezq Hana'a, Khalil Faten
Desert Agriculture and Ecosystems Program, Environment and Life Sciences Research Center, Kuwait Institute for Scientific Research, Safat 13109, Kuwait.
Vet World. 2022 Dec;15(12):2785-2794. doi: 10.14202/vetworld.2022.2785-2794. Epub 2022 Dec 5.
A change in the livestock feeding strategy is of utmost importance for the stability of animal health and sustainable livestock productivity to overcome the problem of subsiding the environmental effects of sheep production. Supplementing dietary feed with safe and efficient additives provides optimal animal performance and maximizes productivity. This study aimed to assess the effects of adding various feed additives to lamb rations for optimizing feed efficiency in weaned lambs for meat production in Kuwait.
The feed additives, namely, ammonium chloride, urea, algae, fishmeal, and humic acid, were investigated on the physical performance of lambs for their effect on body weight, length, height, and waist length. The total feed consumption rate and feed efficiency were also measured. Each treatment comprising five healthy lambs was randomly allocated into six treatments comprising 30 lambs. The six treatments were the basal ration supplemented with ammonium chloride (50-100 g/day/head), urea (30 g/day/head), fishmeal (35 g/day/head), algae () powder (50 g/day/head), humic acid (2.5 g/day/head), control group with only basal ration. The study was conducted for around 27 months and the data were recorded once in 2 weeks.
The results indicated a positive elevation in the physique of lambs with all tested additives, showing an affirmative insignia for lamb fattening. The growth parameters in terms of augmented length, height, and waist length of lambs' bodies amplified significantly with ammonium chloride and fishmeal supplement, while the other additives reported a non-significant increment. The feed consumption was significantly elevated for ammonium chloride, algae, and fishmeal supplementation, while humic acid was recorded the least. Concerning feed efficiency of young lambs, fish meal and ammonium chloride were reported best, followed by urea. In contrast, algae and humic acid exhibited a non-significant effect on feed efficiency.
This study exposed noteworthy influence on a lamb body's performance with the addition of fish meal and ammonium chloride in lamb rations, trailed by urea and algae.
改变牲畜饲养策略对于动物健康的稳定性和可持续的牲畜生产力至关重要，以克服减轻绵羊生产对环境影响的问题。用安全高效的添加剂补充日粮饲料可提供最佳的动物性能并使生产力最大化。本研究旨在评估在科威特向羔羊日粮中添加各种饲料添加剂对断奶羔羊育肥饲料效率的影响。
研究了氯化铵、尿素、藻类、鱼粉和腐植酸等饲料添加剂对羔羊身体性能的影响，包括对体重、体长、体高和腰长的影响。还测量了总采食量和饲料效率。将每组五只健康羔羊的每个处理随机分为六个处理组，共30只羔羊。六个处理分别是基础日粮添加氯化铵（50 - 100克/天/头）、尿素（30克/天/头）、鱼粉（35克/天/头）、藻类（）粉（50克/天/头）、腐植酸（2.5克/天/头），对照组仅为基础日粮。研究进行了约27个月，每两周记录一次数据。
结果表明，所有测试添加剂都使羔羊的体格有正向提升，显示出对羔羊育肥的肯定标志。氯化铵和鱼粉补充剂使羔羊身体的体长、体高和腰长等生长参数显著增加，而其他添加剂的增加不显著。氯化铵、藻类和鱼粉补充剂使采食量显著提高，而腐植酸的采食量最低。关于幼龄羔羊的饲料效率，鱼粉和氯化铵最佳，其次是尿素。相比之下，藻类和腐植酸对饲料效率的影响不显著。
本研究表明，在羔羊日粮中添加鱼粉和氯化铵对羔羊身体性能有显著影响，其次是尿素和藻类。
