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首页> 外文期刊>Poultry Science >Influence of supplemental dietary poultry fat, phytase, and 25-hydroxycholecalciferol on the egg characteristics of commercial layers inoculated before or at the onset of lay with F-strain mycoplasma gallisepticum.
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Influence of supplemental dietary poultry fat, phytase, and 25-hydroxycholecalciferol on the egg characteristics of commercial layers inoculated before or at the onset of lay with F-strain mycoplasma gallisepticum.

机译：补充日粮家禽脂肪，植酸酶和25-羟胆钙化固醇对在鸡败血性F株支原体感染之前或开始时商业化蛋鸡蛋特性的影响。

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摘要

The effects of supplemental dietary poultry fat (PF), phytase (PHY), and 25-hydroxycholecalciferol (D3) on the egg characteristics of commercial layers inoculated with F-strain Mycoplasma gallisepticum (FMG) were investigated in 2 trials. Sham and FMG inoculations were administered at 12 (before lay) and 22 (onset of lay) wk and 4 dietary treatments [basal control diet (BCD); BCD with 0.75% supplemental PF; BCD with 1.50% supplemental PF; BCD with 1.50% supplemental PF, 0.013% PHY, and 0.025% D3] were initiated at 20 wk of age. Percentages of albumen, yolk, and eggshell weights; yolk:albumen ratio; yolk moisture and lipid concentrations; and eggshell weight per unit of surface area were determined at 24, 34, 44, 50, and 58 wk of age. Inoculation with FMG reduced yolk lipid concentration at wk 24 and increased yolk moisture concentration at wk 58. In birds inoculated on wk 22, percentage of yolk weight was lower in those inoculated with FMG compared with those that were sham-inoculated. Yolk:albumen ratio was lower in birds that were FMG-inoculated at 22 wk of age compared with those that were sham-inoculated at the same age or that were FMG-inoculated at 12 wk of age. Percentage of yolk weight was greater in birds inoculated at wk 22 and fed the BCD with 1.50% supplemental PF treatment compared with those inoculated at wk 22 and fed the BCD or BCD with 1.50% supplemental PF, 0.013% PHY, and 0.025% D3 treatments and compared with birds inoculated at wk 12 and fed the BCD with 0.75% supplemental PF treatment. In conclusion, inoculation with FMG before or at the onset of lay caused a decrease in yolk lipid content early in lay but an increase in yolk moisture late in lay, and FMG reduced percentage of yolk weight in birds inoculated on wk 22. Furthermore, when used in combination with added 1.50% PF in birds inoculated on wk 22, supplementary PHY and D3 prevented an increase in percentage of yolk weight that occurred in response to diets supplemented only with 1.50% PF.
机译：补充日粮家禽脂肪（PF），植酸酶（PHY）和25-羟胆钙化固醇（D 3 ）对接种F株鸡毒支原体的商品蛋鸡蛋特性的影响i>（FMG）在2个试验中进行了研究。在第12周（产前）和第22周（产蛋开始）每周进行假和FMG接种，并进行4种饮食治疗[基本控制饮食（BCD）;具有0.75％补充PF的BCD;具有1.50％补充PF的BCD;在20周龄时开始补充BCD，添加1.50％PF，0.013％PHY和0.025％D 3 ]。蛋白，蛋黄和蛋壳重量的百分比;蛋黄：白蛋白比例;蛋黄水分和脂质浓度;和单位表面积的蛋壳重量分别在24、34、44、50和58周龄时确定。接种FMG降低了第24周的蛋黄脂质浓度，并增加了第58周的蛋黄水分浓度。在第22周接种的鸡中，接种FMG的鸡的卵黄重量百分比比假接种的鸡低。与在相同年龄假接种或在12周龄接种FMG的鸡相比，在22周龄FMG接种的鸡的蛋黄：白蛋白比率要低。与在22周时接种BCD或BCD并向BCD或BCD饲喂1.50％补充PF，0.013％PHY和0.025％D < sub> 3 处理，并与第12周接种的鸟类进行比较，并为BCD饲喂0.75％的补充PF处理。总之，在产蛋前或产蛋前接种FMG会导致产蛋早期卵黄脂质含量降低，而产后后期卵黄水分增加，并且FMG降低了第22周接种的禽的蛋黄重量百分比。在第22周接种的家禽中，与添加1.50％PF配合使用时，补充PHY和D 3 可以防止仅添加1.50％PF的日粮引起的蛋黄重量百分比的增加。

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