Egg production, egg quality, and fatty acids profiles in eggs and tissues in Lohmann LSL lite hens fed algal oils rich in docosahexaenoic acid (DHA)

Enriching eggs with omega-3 fatty acids (n-3 FA), such as docosahexaenoic acid (DHA), is a well-accepted practice that benefits the egg industry and consumers. However, issues around cost, sustainability, and product acceptance have necessitated the search for alternatives to feeding hens fish oil for DHA enrichment. The effects of feeding 2 algal oils on egg production and DHA enrichment in eggs and selected tissues were investigated. The algal oils were: 1) OmegaPro (OPAO) standardized algal oil for DHA content and 2) Crude algal oil (CAO). A total of 400, 46-wk-old Lohmann LSL lite hens were housed in enriched cages (10 birds/cage) and allocated 5 diets (n = 8) for a 12-wk trial. The iso-caloric and -nitrogenous diets were a standard corn and soybean meal diet, standard plus 0.25 or 0.76% OPAO and standard plus 0.23 or 0.69% CAO; algal oils diets supplied similar DHA at each level. Egg production indices (hen day egg production, feed intake, FCR, egg weight, egg mass, and eggshell quality) were monitored for 10 wk. Diet samples were analyzed for fatty acids (FA) on wk 1, 6, and 12 and eggs on wk 4, 5, 6, 9, and 12. At the end of the trial, one hen/cage was weighed and dissected for liver, breast and thigh for FA and long bones for ash content analyses. Concentration of omega-6 to omega-3 FA ratio was 12.9, 6.64, 3.48, 6.96, and 3.59 for standard, 0.23 and 0.76% OPAO, 0.25 and 0.69% CAO, respectively. Algal oils increased (P ≤ 0.046) eggshell thickness linearly. The concentration of DHA in the eggs from the birds fed the standard, 0.23 and 0.76% OPAO, 0.25 and 0.69% CAO was 84, 195, 286, 183, and 297 mg/100g egg, respectively, and algal oils enriched eggs with DHA linearly and quadratically (P ≤ 0.01). In conclusion, algal oils increased the concentration of DHA in eggs and had no adverse effects on egg production and eggshell quality.通过在鸡蛋中富集Omega-3脂肪酸（omega-3 fatty acids, n-3 FA），例如二十二碳六烯酸（docosahexaenoic acid, DHA），是一项已被行业广泛认可的实践，既能助力蛋品产业发展，也可惠及消费者。然而，成本、可持续性及产品接受度等方面的问题，促使研究者寻求替代鱼油的饲喂方案，以实现鸡蛋的DHA富集。本研究探究了两种藻油对蛋鸡产蛋性能、鸡蛋及选定组织中DHA富集效果的影响。本次试验所用藻油包括：1）针对DHA含量标准化的OmegaPro藻油（OPAO）；2）粗制藻油（CAO）。试验共选取400只46周龄的罗曼LSL lite蛋鸡，饲养于富集型笼养设施中（每笼10只），并被随机分为5组日粮处理（每组8个重复），试验周期为12周。试验采用等能等氮日粮，具体包括：基础玉米-豆粕日粮；基础日粮添加0.25%或0.76%的OPAO；基础日粮添加0.23%或0.69%的CAO；各藻油日粮在对应添加水平下提供等量的DHA。试验前10周持续监测产蛋性能指标，包括只日产蛋率、采食量、料重比（feed conversion ratio, FCR）、蛋重、总蛋重及蛋壳质量。分别于第1、6、12周采集日粮样本，于第4、5、6、9、12周采集鸡蛋样本，用于脂肪酸（fatty acids, FA）分析。试验结束时，从每笼中选取1只蛋鸡进行称重并解剖，采集肝脏、胸肌及腿肌样本用于脂肪酸分析，采集长骨样本用于灰分含量检测。基础日粮、0.23% OPAO日粮、0.76% OPAO日粮、0.25% CAO日粮及0.69% CAO日粮的Omega-6与Omega-3脂肪酸比值分别为12.9、6.64、3.48、6.96及3.59。藻油可线性提升蛋壳厚度（P ≤ 0.046）。饲喂基础日粮、0.23% OPAO日粮、0.76% OPAO日粮、0.25% CAO日粮及0.69% CAO日粮的蛋鸡所产鸡蛋的DHA浓度分别为84、195、286、183及297 mg/100g鸡蛋，且藻油对鸡蛋DHA的富集效果呈线性和二次显著影响（P ≤ 0.01）。综上，藻油可有效提升鸡蛋中的DHA浓度，且对蛋鸡产蛋性能及蛋壳质量无不良影响。

搜集汇总

背景与挑战

背景概述

该数据集研究了在Lohmann LSL轻型蛋鸡饲料中添加富含DHA的海藻油对鸡蛋产量、质量和脂肪酸组成的影响。实验涉及400只蛋鸡，分为五组饮食（包括标准饲料和不同比例的海藻油添加），进行了12周试验，结果显示海藻油能显著提高鸡蛋中DHA浓度（最高达297 mg/100g），并线性增加蛋壳厚度，且未对产蛋产生不利影响。