SOME NUTRITIONAL STUDIES ON EGYPTIAN FEMALE BUFFALO COWS FED GREEN OR DRY FEEDS AND THEIR EFFECT ON THE PRODUCTIVE PERFORMANCE AND BLOOD SERUM

Abstract

Fourteen female buffaloes were assigned randomly into four groups {T1, T2, T3, T4) and fed their nutritional allowances according to EI-Ashry (1980) to study the effect of summer {T1 and T2) or winter {T3 and T4) feeds on short days open females T 1, T3 (less than 90 days) or long days open females T2, T4 (more than 90 days) according to the phenomena of rebreeding in Egyptian buffaloes. In addition, the interrelationship between this phenomena and the concentration of some metabolites in blood plasma (hormones, minerals, protein fractions, some liver enzymes, urea, creatinine, total lipids and cholesterol) were studied. Results indicated that there was a significant relationship between feeding regimen (in winter or in summer) and milk production and fat content in milk. Also, there was a remarkable relationship between productive efficiency and calving interval. Albumin, GPT, GOT, cholesterol, total lipids, copper and zinc in blood plasma affected significantly the days-open interval and they were also affected by the feeding regime. Progesterone profile in the studied groups and some reproductive traits were also studied.