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首页> 外文期刊>Poultry Science >Effects of in ovo injection of carbohydrates on embryonic metabolism, hatchability, and subsequent somatic characteristics of broiler hatchlings
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Effects of in ovo injection of carbohydrates on embryonic metabolism, hatchability, and subsequent somatic characteristics of broiler hatchlings

机译：卵内注射碳水化合物对肉仔鸡雏鸡胚胎代谢，孵化率及随后体细胞特性的影响

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The effects of the in ovo injection of different carbohydrate solutions on the internal egg temperature (IT), hatchability, and time of hatch of embryonated Ross x Ross 708 broiler hatching eggs were determined. In addition, the BW, liver weight, yolk sac weight (YSW), and yolk-free BW (YFBW) of the embryos on d 19.5 of incubation and of the chicks on day of hatch were determined. Eggs containing live embryos were injected in the amnion on d 18.5 of incubation using an automated multiple-egg injector. Solution injections delivered 1.2 mL of physiological saline (0.85%) alone or with a supplemental carbohydrate. The following supplemental carbohydrates were separately dissolved in saline at a concentration of 0.3 g/mL: glucose, fructose, sucrose, maltose, and dextrin. Temperature transponders were implanted in the air cells of embryonated and nonembryonated eggs after in ovo injection for the detection of IT at 6, 14, and 22 h after injection. The IT of embryonated eggs was significantly greater than that of nonembryonated eggs at all 3 times after the treatment period. Eggs that were injected with saline with or without supplemental carbohydrates experienced a reduction in IT when compared with control eggs whose shells were perforated without solution delivery, and the decrease in IT was associated with a delay in hatch time. Liver weight was negatively related to YSW and positively related to YFBW, and YSW was negatively related to YFBW. Although the saline and carbohydrate solution injections increased chick BW compared with noninjected controls, chick YFBW was decreased in the maltose-and sucrose-injected groups. In conclusion, the injection of 1.2 mL of saline with or without supplemental carbohydrates lowered embryonic metabolism, as reflected by a lower IT and a delay in time of hatch. However, effects of the different carbohydrate solutions on yolk absorption and tissue deposition in yolk-free embryos varied. These results suggest that lower volumes for solutions containing maltose, sucrose, or fructose should be considered for in ovo injection.
机译：确定了卵内不同碳水化合物溶液的卵内注射对胚胎化的Ross x Ross 708肉鸡孵化蛋的内部蛋温（IT），孵化率和孵化时间的影响。另外，测定孵化第19.5天的胚胎和孵化日雏鸡的体重，肝重，卵黄囊重量（YSW）和无卵黄体重（YFBW）。在培养的第18.5天，使用自动多蛋注射器将含有活胚胎的卵注射到羊膜中。溶液注射可单独或与补充碳水化合物一起输送1.2 mL生理盐水（0.85％）。将以下补充碳水化合物分别以0.3 g / mL的浓度溶解在盐水中：葡萄糖，果糖，蔗糖，麦芽糖和糊精。在卵内注射后，将温度应答器植入到有胚和无胚卵的气室中，以在注射后6、14和22小时检测IT。在治疗期后的所有3次中，胚卵的IT均显着高于未胚卵的IT。与不带溶液输送的带壳穿孔的对照鸡蛋相比，注射有或没有补充碳水化合物的盐水注射的鸡蛋的IT降低，而IT的降低与孵化时间的延迟有关。肝脏重量与YSW负相关，与YFBW正相关，而YSW与YFBW负相关。尽管与未注射的对照组相比，注射盐水和碳水化合物溶液可增加雏鸡的体重，但在注射了麦芽糖和蔗糖的组中，雏鸡的YFBW降低了。总之，注射1.2 mL含或不含补充碳水化合物的盐水会降低胚胎的新陈代谢，这体现在较低的IT和孵化时间的延迟上。但是，不同碳水化合物溶液对无蛋黄胚胎中蛋黄吸收和组织沉积的影响各不相同。这些结果表明，在卵内注射时应考虑使用较小体积的含有麦芽糖，蔗糖或果糖的溶液。

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