Effect of sea buckthorn extract on production performance, serum biochemical indexes, egg quality, and cholesterol deposition of laying ducks

Abstract

The purpose of this experiment was to study the effect of sea buckthorn extract (SBE) supplementation on the production performance, serum biochemical indexes, egg quality, and cholesterol deposition of laying ducks. A total of 240 23-week-old laying ducks (female ducks) with similar body weight were randomly divided into four treatment groups with 6 replicates of 10 each. The experimental groups were fed diets supplemented with 0, 0.5, 1.0, and 1.5 g/kg of SBE, respectively. The results showed that the addition of 1.0 g/kg SBE to the diet had significant increase (P < 0.05) in average egg weight and feed conversion ratio. The inclusion of SBE showed the significant improvement (P < 0.05) in yolk weight, shell strength, egg white height and haugh unit. Ducks fed with 1.0 and 1.5 g/kg SBE displayed a significant decrease (P < 0.05) in yolk cholesterol. The significant improvements were observed in the contents of total amino acid essential amino acids, non-essential amino acids, umami amino acids, monounsaturated fatty acids, and docosahexenoic acids of eggs (P < 0.05) when supplemented with SBE. However, the contents of total saturated fatty acids, polyunsaturated fatty acids, n-3 polyunsaturated fatty acids and n-6 polyunsaturated fatty acids in eggs showed decrease when ducks fed with SBE diets (P < 0.05). SBE diets may reduce (P < 0.05) the levels of serum total cholesterol, triglyceride, and low-density lipoprotein cholesterol, while increased (P < 0.05) the levels of serum superoxide dismutase, total antioxidant capacity, and glutathione catalase compared to the control. The levels of serum immunoglobulin G, immunoglobulin A and immunoglobulin M were improved in SBE diets (P < 0.05) in comparation to the control. The addition of SBE to diets can improve feed nutrient utilization, increase egg weight, optimaze egg quality and amino acid content in eggs, reduce blood lipids, improve fatty acid profile and yolk cholesterol in eggs, and increase antioxidant capacity and immunity in laying ducks.

Effects of quercetin and genistein on egg quality, lipid profiles, and immunity in laying hens

“…Yao et al . discovered that the administration of sea buckthorn extract resulted in a notable elevation in serum immunoglobulin levels, specifically IgA, IgM, and IgG, among female ducks 43 . Our study findings demonstrated that the administration of quercetin alone or in combination with genistein had a synergistic effect in enhancing the levels of IgA and IgM in the serum of laying hens.…”

Analysis of Transcriptomic Differences in the Ovaries of High- and Low-Laying Ducks

“…Elevated egg weight typically indicates improved egg quality [14]. Prior research has demonstrated that incorporating certain organic substances can enhance the feed utilization, consequently improving the egg quality [15]. This could explain why the highyielding group in this experiment exhibited superior feed utilization, resulting in higher egg weights.…”

Dietary supplementation with sea buckthorn meal alone and in combination with bilberry leaves: assessment of growth performance, health status and intestinal microflora in broiler chickens

“…No studies were found investigating the effect of mixture of sea buckthorn meal and bilberry leaves. When supplementing alone, sea buckthorn extracts (0.5, 1.0, and 1.5 g/kg) diets reduced the levels of serum total cholesterol, triglyceride, and low-density lipoprotein cholesterol, compared to the control in laying ducks (Yao et al, 2023). Contrary, Orczewska-Dudek et al, (2018) showed a reduction of triglyceride, cholesterol and glucose content in plasma from the chickens receiving sea buckthorn meal in the diet (dietary 3% flax oil and 3% dried sea buckthorn pomace).…”