Department of Poultry Science, University of Arkansas, Fayetteville, AR72701, USA.
Poult Sci. 2010 Dec;89(12):2646-50. doi: 10.3382/ps.2010-00932.
Two experiments were conducted with a commercial turkey company using a commercial egg injection system to investigate the effect of a dextrin-iodinated casein solution injected in ovo at 25 d of incubation on turkey poult hatchability, hatch weight, and growth (6 or 7 d posthatch). In experiment 1, a total of 3,900 turkey eggs (1,300 per group) were injected at 25 d of incubation with either 200 μL of a control (physiological saline) solution or a dextrin solution (18% maltodextrin and 10% potato starch dextrin) with 75 or 375 μg/mL of iodinated casein (DexIC75 or DexIC375, where Dex and IC refer to dextrin and iodinated casein, respectively). Two hundred poults from each group were neck-tagged, weighed (hatch weight), placed in a commercial turkey house within a single brooder ring, and weighed again (7 d posthatch). In experiment 2, a total of 5,200 eggs (2,600 per group) were injected with the control or DexIC75 solution. A total of 600 poults (300 per group) were neck-tagged and hatch weights were obtained, followed by placement in a single brooder ring in a commercial house and a second weighing (6 d posthatch). Eggs in experiments 1 and 2 were obtained from hen flocks that were 33 and 5 wk into the laying cycle, respectively. In experiment 1, the DexIC75 injection resulted in a 1.8% increase (P = 0.03) in hatch weight. In experiment 2, the DexIC75 treatment resulted in a 2.4% increase in hatchability (P = 0.01), a 4.3% increase in hatch weight (P < 0.001), and a 1.8% increase in 6-d poult weights (P < 0.03) compared with controls. Results of this study indicate that a solution containing dextrin and 75 μg/mL of iodinated casein injected into turkey eggs at 25 d of incubation may be used to improve early poult weights, hatchability, or both in commercial turkey production.
本研究旨在探讨在孵化 25 日龄时向鸡蛋中注射含有糊精和 75μg/mL 碘化酪蛋白的溶液对火鸡孵化率、孵化体重和生长（孵化后 6 或 7 日龄）的影响。试验一使用商业鸡蛋注射系统，在一家商业火鸡公司进行，共选用 3900 枚鸡蛋（每组 1300 枚），在孵化 25 日龄时注射 200μL 生理盐水或糊精溶液（18%麦芽糊精和 10%马铃薯淀粉糊精），其中含有 75 或 375μg/mL 碘化酪蛋白（DexIC75 或 DexIC375，其中 Dex 和 IC 分别表示糊精和碘化酪蛋白）。每组 200 只雏鸡进行颈标称重（孵化体重），然后放置在一个商业火鸡育雏笼中，再次称重（孵化后 7 日龄）。试验二选用 5200 枚鸡蛋（每组 2600 枚），注射生理盐水或 DexIC75 溶液。每组 600 只雏鸡进行颈标称重并记录孵化体重，然后放置在商业火鸡育雏笼中，再次称重（孵化后 6 日龄）。试验一和试验二的鸡蛋分别来自产蛋周期第 33 周和第 5 周的母鸡群体。在试验一中，DexIC75 注射使孵化体重增加了 1.8%（P = 0.03）。在试验二中，DexIC75 处理使孵化率提高了 2.4%（P = 0.01），孵化体重增加了 4.3%（P < 0.001），6 日龄雏鸡体重增加了 1.8%（P < 0.03）。本研究表明，在孵化 25 日龄时向鸡蛋中注射含有糊精和 75μg/mL 碘化酪蛋白的溶液可能有助于提高商业火鸡生产中的早期雏鸡体重、孵化率或两者兼而有之。
