Economical assessment and effect of factors on the live weight gain in lambs form the Northeast Bulgarian Merino breed and it's crosses with Australian Merino and Ile-de-France

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Tarih

2008

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Yayıncı

Erişim Hakkı

info:eu-repo/semantics/openAccess

Özet

A scientific economical experiment with 42 lambs from three genotypes has been performed: 14 froml the Northeast Bulgarian Merino (NEBM) breed, 14 crosses of NEBM with A blood of Australian Merinol breed - internal breeding and 14 crosses with A blood of Ile-de-France breed - internal breeding. In the beginning of the trial, the lambs were equalized with regard to their age, gender, birth type, age of th weaning- and age of dams. The fattening lasted up to the 130 day of age. The lambs were fed freely with concentrate feed, alfalfa hay and corn silage. The control of live body weight was performed at 14-day intervals and spent forages were weighed on a daily basis. The absolute live weight gain, the cost of 1 kg live weight gain and the net income from the weight gain of the three groups of lambs were estimated at the ages of 100 and 130 days. The factorial effect of feed type on the absolute live weight gain by groups and by ages was also studied.l The lambs with A blood of Ile-de-France (internal breeding) were superior than the other 2 genotypes with regard to the absolute weight gain, the cost and the net income of 1 kg weight gain. They exhibited the highest biological maximum and economical optimum of the absolute weight gain at the background of a balanced absolute and relative effect of forages. A very strong factorial effect of forages on the absolute weight gain levels was determined. .

Açıklama

Anahtar Kelimeler

Ziraat Mühendisliği, Ile de France, economic analysis, Merino, Bulgaria, lambs, liveweight gain, sheep breeds, Australia, finishing

Kaynak

Tekirdağ Ziraat Fakültesi Dergisi

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Cilt

5

Sayı

1

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