研究报告：在育雏期间，对鸡胚注射有机锌、锰和铜以及出壳后放置前的保持时间对肉鸡体温的影响。

Research Note: Effects of the in ovo injection of organic zinc, manganese, and copper and posthatch holding time before placement on broiler body temperature during grow out.

机构信息

Department of Poultry Science, Mississippi State University, Mississippi State 39762, USA.

Department of Animal Science, Federal University of Lavras, Lavras, Minas Gerais, Brazil 37200000.

出版信息

Poult Sci. 2021 Feb;100(2):755-759. doi: 10.1016/j.psj.2020.10.048. Epub 2020 Nov 5.

DOI:10.1016/j.psj.2020.10.048

PMID:33518129

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7858143/

Abstract

Effects of the in ovo injection of organic microminerals (OM) (zinc, manganese, and copper) and posthatch holding time (HT) on the daily body temperature (bt) of broilers during grow out were determined. The hatching eggs from a Ross 708 breeder flock at 32 wk of age were incubated under standard commercial conditions. At 17 d of incubation, eggs were randomly allocated to 3 in ovo OM injection treatment (TRT) groups, and at 21 d of incubation, male hatchlings were randomly allocated to 2 posthatch HT treatment groups. Eggs were either not injected or were in ovo injected with diluent only or diluent containing the OM mixture. A 0-hour HT group had immediate access to water and feed, and a 24-hour HT (24HT) group contained birds that were kept in transport baskets in their pens without access to feed and water for 24 h before being released. Fifteen male birds were placed in each of 36 litter floor pens in a temperature-controlled facility. Approximately 2 birds in each of 6 replicate pens belonging to each TRT-HT combination had temperature transponders inserted subcutaneous in the mid-dorsal region of the neck. All birds were brooded under standard commercial conditions and had ad libitum access to feed and water after their respective HT. The bt of the same birds were determined daily at the same time each day beginning at hatch and ending on 39 d of posthatch age (AGE). There were no significant main or interactive effects involving TRT or HT for bt. However, there was a significant (P ≤ 0.0001) main effect because of AGE. A general increase in bt occurred during the 39 d grow out period. At hatch, bt was 40.54 ± 0.056°C and at AGE 39 was 41.46 ± 0.055°C. Under standard brooding conditions, a general increase in bt occurred in the Ross 708 broilers. However, these birds did not exhibit a significant bt response to TRT or a 24HT before placement.

摘要

在育雏期间，研究了种蛋内注射有机微量元素（锌、锰和铜）和出雏后保持时间（HT）对肉鸡日体温（bt）的影响。32 周龄罗斯 708 种鸡群的孵化蛋在标准商业条件下孵化。在孵化第 17 天，将蛋随机分配到 3 种种蛋内 OM 注射处理（TRT）组，在孵化第 21 天，将雄性雏鸡随机分配到 2 种出雏 HT 处理组。蛋要么不注射，要么种蛋内注射稀释剂或含有 OM 混合物的稀释剂。0 小时 HT 组立即获得水和饲料，24 小时 HT（24HT）组包含在育雏笼中饲养的鸟类，在获得饲料和水之前，将其放置在运输篮中 24 小时，然后再释放。在一个温度可控的设施中，36 个垫料地板笼中每笼放置 15 只雄性鸟。属于每个 TRT-HT 组合的 6 个重复笼中的大约 2 只鸟的颈部中背部皮下插入了温度传感器。所有鸟类在标准商业条件下育雏，在各自的 HT 后自由获得饲料和水。在出雏后的第 39 天（AGE），每天在同一时间确定相同鸟类的 bt。BT 没有显著的主要或相互作用效果涉及 TRT 或 HT。然而，由于 AGE，存在显著的（P≤0.0001）主要影响。在 39 天的育肥期内，bt 普遍增加。出雏时，bt 为 40.54±0.056°C，AGE 39 时为 41.46±0.055°C。在标准育雏条件下，罗斯 708 肉鸡的 bt 普遍增加。然而，这些鸟在放置前没有表现出对 TRT 或 24HT 的显著 bt 反应。