期刊
JOURNAL OF THERMAL BIOLOGY
卷 61, 期 -, 页码 38-43出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jtherbio.2016.08.004
关键词
Quail; THI; Fertility; Egg quality
Heat stress is one of the major causes of a decreased performance of laying quail in tropical and subtropical countries. The aim of this study was to investigate the impact of temperature humidity index (THI) on fertility aspects, external and internal egg quality parameters in Japanese quail. One hundred and forty four (144) Japanese quail, 12 of weeks age, were used. Birds were divided randomly into three equal groups, control (at low THI, lower than 70), H-1 (at moderate THI, 70-75) and H-2 (at high THI, 76-80). Quail in the control and H-1 groups had significant greater fertility (p=0.021) and hatchability % (p=0.037), compared with H-2 group. Quail in the control group (at low THI) laid heavier egg weight with a higher external (egg weight (p=0.03), shell thickness, shell weight, eggshell ratio and eggshell density (p=.001)) and internal egg quality score (albumin weight (p=0.026), yolk height (p=0.003), yolk index (p=0.039) and Haugh unit (p=0.001)). Otherwise, such quality traits were compromised in heat stressed quail. At the high THI level, egg weight had a significant positive correlation with albumin weight (r=0.58, p < 0.01), yolk weight (r=0.22, p < 0.05), albumen ratio (r=0.17, p < 0.05), yolk height (r=0.14, p < 0.05) and yolk index (r=0.18, p < 0.05), but was negatively correlated with yolk ratio (r=-0.15, p < 0.05). Japanese quail exposed to heat stress (THI over 75) revealed drop in fertility indices and egg quality traits, indicating a detrimental policy of economic income. (C) 2016 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据