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On the relation between milk production and fertility in Kibbutz dairy cattle herds *

Published online by Cambridge University Press:  27 March 2009

G. Francos  and
D. Rattner
G. Francos
Affiliation:
Hachaklait, P.O.B. 9610, Haifa, Israel
D. Rattner
Affiliation:
Institute for Animal Research, Lahav, Israel
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Summary

Milk production (305 day lactations, 3·5% fat-corrected milk), and lengths of time between calving and conception for 541 heifers and 1127 older cows were examined. These data were collected from 11 herds in collective farms in Israel during two successive years. Herd lactation means ranged from 5046 to 8570 kg for cows and from 5021 to 7250 for heifers; the ranges of time between calving and conception were 89–123 days and 99–141 days, respectively.

A significant correlation was found between the weight of milk given per lactation and the length of the interval between calving and the next conception, with coefficients of 0·298 (cows) and 0·333 (heifers). There was a positive non-linear regression of length of calving to conception interval on production of milk, the regression line becoming steeper, both for cows and heifers, as yield rose.

All herds practised first insemination at the first heat exhibited after 60 days from calving. The results indicate that, when this is done, cows yielding 8000 kg or over per lactation, and heifers yielding 6750 kg or over, will show calving to conception intervals exceeding a mean length of 110 days.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 85 , Issue 3 , December 1975 , pp. 527 - 531
Copyright
Copyright © Cambridge University Press 1975

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References

REFERENCES

Aehnelt, E., Konermann, H. & Lotthamer, K. H. (1968). The relationship between milk yield and fertility in cattle. Zuchthygiene 3, 69–78.Google Scholar
Bar-Anan, R. (1968–1969). The breeding program and achievements of the Israeli Friesian breed. Annual Report, Hasherut A.I. Center, Israel, Appendix I.Google Scholar
Dawson, F. L. M. (1963). The effect on fertility of high milk production in cattle. Refuah Veterinarith 20, 237–42.Google Scholar
Hewett, C. D. (1971). A study of the possible effects of certain environmental factors on fertility and milk production of dairy cows in Sweden. Nordisk Veterinaer Medicin 23, 65–85.Google ScholarPubMed
Horvath, M. (1967). Reproduction in high producing cows. Animal Breeding Abstracts 35, 241. Abstract number 1330.Google Scholar
Morrow, D. A., Roberts, S. J., McEntee, K. & Gray, H. G. (1966). Post-partum uterine activity and uterine involution in dairy cattle. Journal of the American Veterinary Medical Association 149, 1596—1609.Google Scholar
Okljesa, B., Kopljar, M. & Sviben, M. (1967). The relation between milk production and sensitivity of the udder for infection with Streptococcus agalactiae. Veterinarski Arhiv 37, 187–92.Google Scholar