EGG PRODUCTION UNDER 24-HOUR, 26-HOUR AND 28-HOUR LIGHT-DARK CYCLES

被引：16

作者：

FOSTER, WH

机构：

[1] Agricultural Research Institute of Northern Ireland, Hillsborough, Co. Down

来源：

BRITISH POULTRY SCIENCE | 1969年 / 10卷 / 03期

关键词：

D O I：

10.1080/00071666908415769

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

An experiment is described conducted on approximately 1000 pullets over a period of 10 months. The three treatments used were cycles of 24, 26 and 28 h composed of 171/2 light : 61/2 dark, 171/2 light : 81/2 dark and 171/2 light : 101/2 dark. Egg production varied significantly (P < 0.01) among the treatments, the mean rates of lay, expressed as eggs per 100 birds per 24 h, being 76.2, 77.2 and 74.9 for the 24-, 26- and 28-h cycles respectively. The relative effects of the treatments were found to remain unaltered throughout the experiment. © 1969, Taylor & Francis Group, LLC. All rights reserved.

引用

页码：273 / &