مطالعه برخی از پارامترهای زایمانی در گاوهای شیری فرزین هلشتاین در دامداریهای صنعتی تبریز

نویسندگان

1 گروه علوم درمانگاهی، دانشکده دامپزشکی، دانشگاه آزاد اسلامی ، واحد تبریز

2 گروه دامپزشکی، دانشگاه آزاد اسلامی واحد ابهر و واحد علوم تحقیقات دانشگاه آزاد اسلامی

3 گروه علوم درمانگاهی، دانشکده دامپزشکی دانشگاه تهران

چکیده

Objective of the present study was to determine calving
parameters in eighteen large dairy herds of Holstein
Friesian in Tabriz. Data analysis showed that the mean
gestations length were 276.69 ± 6.29, 279.54 ± 8.55 and
271.38 ± 7.34 days in multipara cows and twining
pregnancy respectively. Percent of premature birth were
24.14% in twining (28 cases out of in 116 births), 9.61% in
heifers (114 cases out of 1186 births) and 4.99% in
multipara cattle (132 cases out of 2645 births). Percent of
delayed birth were 2.12% in multipara cattle (56 cases
from 2645 births). However, there was no case of delayed
birth in heifers (out of 1186 cases) and twining parturitions
(out of 116 cases). The rate of male progeny was 47.81%
(2621 out of 5482 births). The rate of twining birth was
4.06% (211 cases out of 5191 births). The rate of stillbirths
was 3.71% (133 cases out of 3589 births) and the rate of
dystocia was 4.84% (227 cases out of 4687 births). The rate
of posterior presentation was 3.81% (121 cases out of 3178
births) and the rate of retained placenta was 9.15% (335
cases out of 3663 births).This study showed that the
gestation length in heifers and twining gestation were
lower than those reported gestation length in references.
Moreover, the rate of male progeny was lower than the
standard ones (p<0.005).

کلیدواژه‌ها

عنوان مقاله [English]

STUDY OF SOME CALVING PARAMETERS IN HOLSTEIN FRIESIAN DIARY CATTLE IN INDUSTRIAL ANIMAL HUSBANDRIES OF TABRIZ

نویسندگان [English]

  • Samad Mosaferi 1
  • Mahdi Abdollahi 2
  • Parviz Tajik 3
1
2
3
چکیده [English]

Objective of the present study was to determine calving parameters in eighteen large dairy herds of Holstein Friesian in Tabriz. Data analysis showed that the mean gestations length were 276.69 ± 6.29, 279.54 ± 8.55 and 271.38 ± 7.34 days in multipara cows and twining pregnancy respectively. Percent of premature birth were 24.14% in twining (28 cases out of in 116 births), 9.61% in heifers (114 cases out of 1186 births) and 4.99% in multipara cattle (132 cases out of 2645 births). Percent of delayed birth were 2.12% in multipara cattle (56 cases from 2645 births). However, there was no case of delayed birth in heifers (out of 1186 cases) and twining parturitions (out of 116 cases). The rate of male progeny was 47.81% (2621 out of 5482 births). The rate of twining birth was 4.06% (211 cases out of 5191 births). The rate of stillbirths was 3.71% (133 cases out of 3589 births) and the rate of dystocia was 4.84% (227 cases out of 4687 births). The rate of posterior presentation was 3.81% (121 cases out of 3178 births) and the rate of retained placenta was 9.15% (335 cases out of 3663 births).This study showed that the gestation length in heifers and twining gestation were lower than those reported gestation length in references.Moreover, the rate of male progeny was lower than the standard ones (p<0.005).

کلیدواژه‌ها [English]

  • Dystocia
  • gestation length
  • Retained placenta
  • stillbirths
  • Twinning
مجله تحقیقات دامپزشکی (Journal of Veterinary Research)
دوره 62، شماره 1
فروردین 1386
صفحه 99-104

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