Swiatkiewicz S, Koreleski J
Department of Animal Nutrition and Feed Science, National Research Institute of Animal Production, ul. Krakowska 1, 32-083 Balice, Poland.
Poult Sci. 2009 Mar;88(3):615-9. doi: 10.3382/ps.2008-00303.
An experiment was conducted with 72 Bovans Brown laying hens to determine the effect of dietary crude glycerin on laying performance; egg quality; retention of N, Ca, and P; and metabolizability of energy. The dietary treatments consisted of a control corn-soybean diet containing 6% corn starch (17% CP, 2,775 kcal/kg of AME(n), 0.81% lysine, 0.36% methionine, 3.60% Ca, and 0.37% available P) and 3 experimental diets. In the experimental diets, 2, 4, or 6% crude glycerin (a coproduct of commercial biodiesel production from rapeseed) was substituted for corn starch. During the experimental period (28 to 53 wk of hen age), the dietary level of glycerin had no significant effects on performance indices [i.e., egg production (mean value of all 4 dietary treatments was 95.6%), egg weight (60.4 g), daily egg mass (57.8 g/hen), daily feed consumption (121 g/hen), and feed conversion (0.477 g of egg mass/g of feed consumed)]. No significant treatment effects were found for egg quality parameters (albumen height, Haugh units, yolk color and thickness, density and breaking strength of eggshell), excretion and retention of N, Ca and P, or metabolizability of energy. Linear regression analysis revealed that the AME(n) value of crude glycerol was 3,970 kcal/kg (as-is basis). The results of this study demonstrated that crude glycerin may be incorporated to a level of 6% in the diet of laying hens without any detrimental effect on egg performance, egg quality, nutrient retention, and metabolizability of energy.
以72只博万斯褐壳蛋鸡进行了一项实验，以确定日粮中粗甘油对产蛋性能、蛋品质、氮、钙和磷的留存以及能量代谢率的影响。日粮处理包括一种含6%玉米淀粉的对照玉米-大豆日粮（17%粗蛋白、2775千卡/千克氮校正代谢能、0.81%赖氨酸、0.36%蛋氨酸、3.60%钙和0.37%有效磷）以及3种实验日粮。在实验日粮中，用2%、4%或6%的粗甘油（油菜籽商业生物柴油生产的副产品）替代玉米淀粉。在实验期（母鸡28至53周龄）内，甘油日粮水平对生产性能指标[即产蛋率（所有4种日粮处理的平均值为95.6%）、蛋重（60.4克）、每日产蛋量（57.8克/只母鸡）、每日采食量（121克/只母鸡）和饲料转化率（0.477克蛋量/克采食饲料）]无显著影响。在蛋品质参数（蛋白高度、哈夫单位、蛋黄颜色和厚度、蛋壳密度和破裂强度）、氮、钙和磷的排泄与留存或能量代谢率方面未发现显著的处理效应。线性回归分析表明，粗甘油的氮校正代谢能值为3970千卡/千克（原样基础）。本研究结果表明，在蛋鸡日粮中可添加至6%水平的粗甘油，而对产蛋性能、蛋品质、养分留存和能量代谢率无任何不利影响。
