https://orcid.org/0000-0002-2814-9179
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ABSTRACT
Emphasis over organic livestock production has resulted in increased interest in natural products. This study aims to evaluate dietary incorporation effect of wormwood (Artemisia absinthium) herb on wool characteristics and economics in sheep. In vitro assay was conducted to determine effective inclusion levels of feed additives followed by in vivo feeding trial for three months on crossbred (15) sheep distributed into three groups: control (Con) fed basal diet, groups fed diet added with 4.50% herb either alone (Hrb) and with 0.60% exogenous fibrolytic enzymes (EFE) (HrbEz), the levels chosen on basis of the best results of in vitro assay. Toward end of feeding trial, six days digestibility trial was conducted after which animals were shorn. Wormwood herb inclusions had significant (P < .05) positive effect on digestible nutrient contents and their intakes. Greasy and clean wool yields were higher (P < .05) resulted in lowering cost of wool production to the tune of 11.3% in Hrb and 22.2% in HrbEz group compared to control with no difference for all fiber quality characteristics except fiber length. It was concluded that incorporation of 4.50% wormwood herb with 0.60% of EFE in diet of sheep resulted in better wool growth economically with no adverse effect on quality.
摘要
对有机牲畜生产的重视导致人们对天然产品的兴趣增加. 本研究旨在评估苦艾草对绵羊羊毛特性和经济性的影响. 进行体外试验以确定饲料添加剂的有效内含物水平, 随后对杂交 (15) 羊进行为期三个月的体内饲养试验, 将其分为三组:对照组 (Con) 饲喂基础日粮, 单独添加4.50%草药 (Hrb) 和添加0.60% (HrbEz) 外源性纤维素酶 (EFE) 的日粮组, 根据体外试验的最佳结果选择水平. 喂食试验快结束时, 进行了为期六天的消化率试验, 然后对动物进行剪毛. 艾草内含物对可消化养分含量及其摄入量有显著的正向影响 (P< .05) . 与对照组相比, HrbEz组的油脂和干净羊毛产量较高 (P< .05), 导致羊毛生产成本降低22.23%, 除纤维长度外, 所有纤维质量特征均无差异. 结果表明, 在绵羊日粮中添加4.50%的艾草和0.60%的EFE, 可以在不影响纤维质量的情况下生产成本效益高的羊毛.
Disclosure statement
No potential conflict of interest was reported by the author(s).