Analysis of the results of random sample tests for laying hens in Hessia during thirty years

被引:0
|
作者
Biedermann, VG [1 ]
Petersen, A [1 ]
Lange, K [1 ]
机构
[1] HESS LANDESANSTALT TIERZUCHT NEU ULRICHSTEIN,D-35315 HOMBURG,GERMANY
来源
ARCHIV FUR GEFLUGELKUNDE | 1997年 / 61卷 / 03期
关键词
D O I
暂无
中图分类号
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号
0905 ;
摘要
By means of 387 groups of 49 strains of laying hens, tested since 1966 in the testing station of Neu-Ulrichstein/Hessia, the development of performances of reproduction and rearing and those of laying period was investigated. There could be shown a positive development in the most characteristics. Concerning the rate of broken eggs, which is to a high degree economically important for the egg production, no improvement was gained. In most cases the estimated correlations between the characteristics seem to be an advantageous condition for a further development.
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页码:97 / 105
页数:9
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