Résumé

The study was conducted on 74 Montbeliard cows raised in Northeastern Algeria under a semi-arid climate to compare the body condition score (BCS) status and some plasma concentrations of major substrates (urea, albumin, total cholesterol, glucose) and minerals (calcium, phosphorus, magnesium) to relate with reproduction performance. The blood samples were collected from cows at 1 month intervals for 3 months postpartum. An assessment of the body condition on the Edmonson grid and the reproductive events were recorded. At the third month post calving, the level of glucose and total cholesterol significantly increased (P<0.05), while the concentrations of magnesium and phosphorus significantly decreased (P<0.05). There was a significant interaction between the nutritional statuses and some reproductive parameters during the postpartum. The reduction of glucose, total cholesterol and urea levels and the increase of calcium and albumin scores were significantly associated to cows with longer intervals of calving-first service and open days (OD). In other hand, a reduction of blood magnesium and phosphorus concentrations and an increased calcium level were recorded in cows with number of services per conception (NSC) equal or greater than three. These results suggest that the postpartum metabolic pattern of change in Montbeliard dairy cows from semi-arid region estimated by the blood substrates and minerals offers a clear indication in the context of the reproduction monitoring. It can explain some factors of low reproductive performance such as the conception rate of the first insemination, insemination index and days open.

Information

Item Type:	Journal
Divisions:	» Production animales, biotechnologie et sante
ePrint ID:	1687
Date Deposited:	2019-04-22
Further Information:	Google Scholar
URI:	https://www.univ-soukahras.dz/fr/publication/article/1687

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