ملخص المقال

The aims of this study was to determine and evaluate zootechnical performance in Prim’ Holstein
and Montbeliard cows imported. A total of 2421 records, collected between 2018 and 2021, from 155
herds, were used for this study. The zootechnical traits studied were: body score condition (BCS),
calving rank (CR), lactation length (LL)daily milk production (DMP), heifer age at first calving (HC), days from calving to first insemination (DCFI), days from first insemination to conception (DFIC), calving interval (CI), number of inseminations per conception (NIC) the success rate at first insemination (SRFI). The factors examined were BCS, calving season. Data shows that the BCS was of 3.03 ± 0.17. The heifer age at first calving was 36.52 ± 5.70 months, a calving rank of 3.5±1.25, calving interval was 423.17 ± 13.58 days, the number of inseminations per conception was 3.07±1.05, an average summer and spring daily milk production of (30.84 ± 12.80 versus 52.77 ± 9.50) liters respectively. Results showed that the DCFI, CI and DMP traits were significantly influenced by year and season of calving (P<0.01); whereas; NIC and SRFI were significantly
(P<0.001) affected by season and year. Furthermore, the breed affect significantly DCFI, SRFI,
NIC and MP (P<0.05). Accordingly, the reproductive performances were poor and several points need
to be reviewed regarding of the breeding management, the improvement of which can help correct
these founds.

معلومات

Item Type:	Journal
Divisions:	» مخبر علوم و تقنيات الأحياء » معهد العلوم الفلاحية و البيطرية
ePrint ID:	5297
Date Deposited:	2025-01-30
Further Information:	Google Scholar
URI:	https://www.univ-soukahras.dz/ar/publication/article/5297

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