日粮脱脂硅藻对蛋鸡产蛋性能和蛋品质的影响。
Effect of dietary defatted diatom biomass on egg production and quality of laying hens.
机构信息
Department of Animal Science, Cornell University, Ithaca, NY 14853, USA.
出版信息
J Anim Sci Biotechnol. 2014 Jan 9;5(1):3. doi: 10.1186/2049-1891-5-3.
BACKGROUND
This study was to determine if feeding laying hens with defatted diatom microalgal biomass (DFA) from biofuel production affected their egg production and health status.
METHODS
Five replicates of 5 individually caged ISA Babcock White leghorn hens were fed 4 diets, including a corn-soybean meal control diet, a diet containing 7.5% DFA substituting for soybean meal, and diets containing 7.5% or 15% DFA substituting for corn and soybean meal. Body weights, feed intake, feed conversion ratio (FCR), rate of egg production, egg size, egg mass, and several characteristics of eggs were determined at 4 and 8 wk. Venous blood was sampled at 4 and 8 wk for measurement of 5 biomarkers of health.
RESULTS
The 15% DFA diet decreased (P < 0.05) feed intake, egg production, and plasma uric acid concentrations as compared with the control diet, but increased (P < 0.05) egg albumen weight and height compared with the 7.5% DFA diets. The two levels of DFA produced dose-dependent (P < 0.05) changes in three color measures of egg yolk, without affecting four hen plasma biochemical indicators of health.
CONCLUSIONS
Feeding laying hens with 7.5% DFA in the corn-soybean meal diet for 8 wk had no adverse effect on their health, egg production, or egg quality, but 15% inclusion reduced feed intake, egg production, and efficiency of feed utilization.
背景
本研究旨在确定以生物燃料生产中提取的脱脂硅藻微藻生物质（DFA）喂养产蛋母鸡是否会影响其产蛋性能和健康状况。
方法
将 5 只单独笼养的 ISA Babcock 白来航母鸡分为 5 组，每组 5 只，每组饲喂 4 种日粮，包括玉米-豆粕对照日粮、7.5%DFA 替代豆粕日粮、7.5%或 15%DFA 替代玉米和豆粕日粮。在第 4 和第 8 周时，测定体重、采食量、饲料转化率（FCR）、产蛋率、蛋重、蛋质量和鸡蛋的一些特性。在第 4 和第 8 周时，采集静脉血样，测定 5 种健康生物标志物。
结果
与对照日粮相比，15%DFA 日粮降低了（P<0.05）采食量、产蛋率和血浆尿酸浓度，但与 7.5%DFA 日粮相比，增加了（P<0.05）蛋清重量和高度。两个水平的 DFA 对蛋黄的三个颜色指标产生了剂量依赖性（P<0.05）的变化，而对母鸡血浆中 4 种健康生化指标没有影响。
结论
在玉米-豆粕日粮中添加 7.5%DFA 喂养产蛋母鸡 8 周对其健康、产蛋性能和蛋品质没有不良影响，但 15%添加量降低了采食量、产蛋率和饲料利用率。
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