首页   按字顺浏览 期刊浏览 卷期浏览 The cycle index, an alternative to the farrowing index converted to a yearly basis
The cycle index, an alternative to the farrowing index converted to a yearly basis

 

作者: A. Wierda,   P.C. van der Valk,   J. C. M. Vernooy,   J. Buurman,   J. C. M. A. Vandenbooren,  

 

期刊: Veterinary Quarterly  （Taylor Available online 1986）
卷期: Volume 8, issue 1  

页码: 40-44

 

ISSN:0165-2176

 

年代: 1986

 

DOI:10.1080/01652176.1986.9694016

 

出版商: Taylor & Francis Group

 

数据来源: Taylor

 

摘要:

The farrowing index is an important parameter for the evaluation of sow productivity. The value of the farrowing index calculated over a relatively short period of time and converted to a yearly basis, depends largely on the number of litters produced during this period. Random differences in the numbers of litters produced in subsequent periods will strongly influence the farrowing indices of these periods.

 

点击下载:  PDF (961KB)



返 回