Porownanie pokroju oraz uzytkowosci mlecznej w trzech kolejnych laktacjach krajowych krow cb i mieszancow cb x hf.
1986
Kamieniecki K.
A comparison of dairy performance, fertility, culling rate, body measurements and body weight of Polish Black-and-White (cb) and cb x Holstein-Friesian (hf) crossbred cows was made. Depending on lactation the crossbred cows yielded by 16-30% milk more than cb cows. The content of fat in milk was lower by 0.04-0.13%. Crossbreds reached the age of the first calving earlier and their third lactation terminated 37-41 days earlier. The fertility in both groups was similar. The crossbred cows were bigger and heavier but narrower at rump than the cb cows.
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书目信息
Prace i Materialy Zootechniczne
ISSN
0137-1649
页码
v.35-44
其它主题
Contenido de lipidos; Lactacion; Medicion del cuerpo
注释
14 ref. Summaries (En, Ru).
翻译的标题
英语.
[Comparison of body measurements and milk performance of Polish Black-and-White cows and their crossbreds with Holstein-Friesian cows in three subsequent lactations]. [Polish]
类型
Journal Article; Journal Part; Summary
来源
Prace-i-Materialy-Zootechniczne (Poland). Polish Journal of Animal Science. (1986). (no. 37) p. 35-44.
团体作者
Akademia Rolnicza, Lublin (Poland). Inst. Hodowli i Technologii Produkcji Zwierzecej
2012-11-15
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