Sun Dongyue, Xu Congcong, Liu Yi, Dai Zichun, Pan Ziyi, Chen Rong, Guo Rihong, Chen Fang, Shi Zhendan, Ying Shijia
College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China; Institute of Animal Science, Animal Husbandry Research Institute, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, PR China.
Institute of Animal Science, Animal Husbandry Research Institute, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, PR China; College of Animal Science and Technology, Beijing University of Agriculture, Beijing 102206, PR China.
Poult Sci. 2024 Dec;103(12):104473. doi: 10.1016/j.psj.2024.104473. Epub 2024 Oct 31.
This study aims to investigate the effects of different relative humidity (RH) during 4-21d of Beijing ducks on their condition at 42 d. A total of 48 Pekin duck were randomly allotted into 4 treatments (A:RH60 %, B:RH67 %,C:RH74 %,D:RH81 %), each having 3 replicates of 4 ducks. Different humidity treatments were applied from 4 to 21 days. At 42 d, there were no significant differences (P > 0.05) in body weight (BW), average daily gain (ADG), average daily feed intake (ADFI), and feed conversion ratio (FCR) among the 4 groups. Oblique body length in D was significantly higher than that in A (P < 0.05). Compared with A, the chest depth of the other groups was significantly increased, and the abdominal fat weight of B and C was significantly increased (p < 0.05). Liver weight and liver index in C and D significantly higher than that in B (p < 0.05). Abdominal fat ratio in B was significantly higher than that in A (P < 0.05). Cholesterol (CHOL) in D was significantly higher than that in A and C (P < 0.05), triglyceride (TG) in C was significantly higher than that in A and B (P < 0.05), and low-density lipoprotein cholesterol (LDL-C) in B was significantly higher than that in A, C, and D (P < 0.05). pH in B was significantly higher than that in A (P < 0.05), brightness (L*) in A was significantly higher than that in B and C (P < 0.05), redness (a*) in B and C was significantly higher than that in A and D (P < 0.05), and yellowness (b*) in C was significantly lower than that in A and D (P < 0.05).The results indicate that the RH of environment during the brooding period has no impact on duck production performance but induces some oxidative stress damage and changes in meat quality. Additionally, ducks subjected to different RH treatments during the brooding period exhibit varying adaptability to the same environment as they mature.
本研究旨在探讨北京鸭4至21日龄期间不同相对湿度（RH）对其42日龄时状况的影响。总共48只北京鸭被随机分为4组处理（A组：RH60%，B组：RH67%，C组：RH74%，D组：RH81%），每组有3个重复，每个重复4只鸭。从4日龄至21日龄采用不同的湿度处理。在42日龄时，4组之间的体重（BW）、平均日增重（ADG）、平均日采食量（ADFI）和饲料转化率（FCR）无显著差异（P>0.05）。D组的斜体长显著高于A组（P<0.05）。与A组相比，其他组的胸深显著增加，B组和C组的腹脂重显著增加（P<0.05）。C组和D组的肝脏重量和肝脏指数显著高于B组（P<0.05）。B组的腹脂率显著高于A组（P<0.05）。D组的胆固醇（CHOL）显著高于A组和C组（P<0.05），C组的甘油三酯（TG）显著高于A组和B组（P<0.05），B组的低密度脂蛋白胆固醇（LDL-C）显著高于A组、C组和D组（P<0.05）。B组的pH值显著高于A组（P<0.05），A组的亮度（L*）显著高于B组和C组（P<0.05），B组和C组的红度（a*）显著高于A组和D组（P<0.05），C组的黄度（b*）显著低于A组和D组（P<0.05）。结果表明，育雏期环境相对湿度对鸭的生产性能无影响，但会引发一些氧化应激损伤和肉质变化。此外，育雏期接受不同相对湿度处理的鸭在成熟后对相同环境表现出不同的适应性。
