- All Journals
- Al-Qadisiyah University
- Basrah University
- Kirkuk University
- Mosul University
- The Iraqi Borad for Medical Specialization
- University of Anbar
- University of Technology
- Al Mustafa University
- Al-Zahraa University for Women
- Alnoor University
- Kunooz University
- Misan University
- Ninevah University
- Tikrit University
- University of Al-Hamdaniya
- University of Kerbala
EFFECT OF PARITY AND SEASON OF CALVING ON SOME PRODUCTIVE AND REPRODUCTIVE TRAITS OF FRIESIAN COWS | ||
| Mesopotamia Journal of Agriculture | ||
| Article 4, Volume 46, Issue 3, 2018, Pages 41-52 PDF (533.56 K) | ||
| Document Type: Research | ||
| DOI: 10.33899/magrj.2018.161476 | ||
| Authors | ||
| Muthanna Al-Juwari1; Mohammed S. M. Al-Salami2 | ||
| 1Animal Resources Dept. College of Agric.& Forestry ,Mosul Univ. Iraq | ||
| 2Animal Resources Dept. College of Agric. ,Tikrit Univ. Iraq. | ||
| Abstract | ||
| The study included analyzed 131 records belong to 34 Friesian cows reared at AL- Iśhagi dairy cattle station (50 km north of Baghdad) for the period from 1996 to 2005. The overall mean of the studied traits milk yield 305 day (MY305day), lactation period (LP) , dry period (DP) the period between calving and first estrous (PSC), services per conceptions (SPC), day open (DO) ,gestation period (GP) and calving interval (CI) were 2775.81 kg, 315.30 days, 71.92 days, 65.52 days, 2.83 services, 109.47 days, 277.75 days, 390.53 days, respectively. Parity showed a significant effect on (MY305day), (LP), (SPC), (DP), but there was no significant effect for the other traits. Season of calving had a significant effect on(MY305day), (LP) and (CI) only. Cows calving through spring and autumn produced more milk significantly compared with cows calving in summer. (LP) and(CI) was longer for cows calving in spring and shorter for there calving in autumn. | ||
|
Statistics Article View: 404 PDF Download: 330 |
||