Abstract
This study was undertaken to investigate the effect of aqueous liquorice extract (ALE) on the growth performance, carcass cuts and intestinal histomorphology of broiler chickens between hatch and 35 days of age. A total of 160-d old (Ross 308) broiler chicks were randomly assigned to 4 treatments, each with 4 replicates, 10 birds per replicate. Four different levels of aqueous liquorice (0, 0.5, 0.7 and 0.9g) were administrated to a liter of drinking water and offered to the birds throughout the entire experimental period. Across the 35 days of trial, administration of ALE to the drinking water resulted in higher (P<0.05) body weight and weight gain. While, feed intake, water intake and FCR did not influence by ALE administration. On the other hand, there was no significant effect of the ALE on carcass cuts, visceral organs and intestinal histomorphology. The study demonstrated that ALE could be administrated to the drinking water of broilers between 0.5 and 0.9g/ liter. However, it would be more economical to use the medium level of ALE (0.7g/ liter) to achieve better results.
Highlights
Ross 308 Herbal extracts have got growing attention as possible feed additives for animal production [36]
Numerous herbal plants have been intensively studied to be used as possible natural growth and health promotors in poultry nutrition in lieu of antibiotic due to its content of biologically active compounds [21]. ===Liquorice (Glycyrrhiza glabra) is a perennial plant or sub-shrub rising to a height of 2 m with horizontal underground stem
The administration of liquorice extract (LE) to the drinking water, improved the productive performance of broiler chickens challenged with heat stress [2]
Summary
Ross 308 Herbal extracts have got growing attention as possible feed additives for animal production [36]. Liquorice contains numerous active compounds including saponin triterpenes (glycyrrhizin, glycyrrhetinic acid and liquorice acid), flavonoids (liquiritin, isoflavonoids and formononetin) and other components such as coumarins, sugars, amino acids, tannins, starch, choline, ascorbic acid, phytosterols and bitter principles [4, 12, 33] It has been used as a pharmaceutical product in ancient Asia [37]. The administration of liquorice extract (LE) to the drinking water, improved the productive performance of broiler chickens challenged with heat stress [2]. This study was accomplished to clarify the impact of aqueous extract of liquorice administration through drinking water on the performance, carcass traits and intestinal histomorphology of broiler chickens. A 5 (μm) were determined using Duncans multiple section of each sample was placed on a glass range tests [8]
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