The effect of feeding and reproductive performance on the calving rate of Cheju native cattle. IV. The reproductive status and calving rate

Kim, J.K.; Kim, M.C.; Kim, S.C.

Korean Journal of Animal Sciences 27(5): 270-275

1985


Accession: 001482612

Download citation:  
Text
  |  
BibTeX
  |  
RIS

Article/Abstract emailed within 1 workday
Payments are secure & encrypted
Powered by Stripe
Powered by PayPal

Abstract
The reproductive performance of 615 Cheju [Korean Black] and crossbred Cheju heifers and cows reared in 5 villages was studied. At the 5 villages, age at 1st insemination averaged 28.7+or-4.52 to 31.6+or-3.54 months, age at 1st calving 38.2+or-4.69 to 40.5+or-3.84 months, number of days to 1st postpartum oestrus (excluding data on cows which calved only every alternate year) 82.9+or-21.59 to 104.0+or-33.66, number of days to 1st postpartum oestrus (including data on cows which calved only every alternate year) 119.9+or-112.25 to 236.0+or-135.71 (P<0.01), number of services per conception 1.2 to 1.9. [For Pt. III see pp. 265-269 of the same number of the journal].