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Nutrition and reproductive performance of dairy cattle 1. The effect of level of feeding in late pregnancy and around the time of insemination on the reproductive performance of first lactation dairy heifers

Published online by Cambridge University Press:  02 September 2010

M. J. Ducker ,
Rosemary A. Haggett ,
W. J. Fisher ,
S. V. Morant  and
Glenys A. Bloomfield
M. J. Ducker
Affiliation:
Department of Dairy Husbandry, National Institute for Research in Dairying, Shinfield, Reading RG2 9AT
Rosemary A. Haggett
Affiliation:
Department of Dairy Husbandry, National Institute for Research in Dairying, Shinfield, Reading RG2 9AT
W. J. Fisher
Affiliation:
Department of Dairy Husbandry, National Institute for Research in Dairying, Shinfield, Reading RG2 9AT
S. V. Morant
Affiliation:
Department of Dairy Husbandry, National Institute for Research in Dairying, Shinfield, Reading RG2 9AT
Glenys A. Bloomfield
Affiliation:
Department of Dairy Husbandry, National Institute for Research in Dairying, Shinfield, Reading RG2 9AT
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Abstract

One hundred first lactation Friesian dairy heifers were used to investigate the effect of level of nutrition n i late pregnancy and for a limited period around the time of insemination on reproductive performance. The heifers were housed throughout the period of the trial in cubicle yards and all individuals were given controlled amounts of food.

Fifty animals were offered a ‘high’ (H) level of feeding in late pregnancy (for 10 weeks before calving) and 50 were offered a ‘low’ (L) level. After calving, the heifers were re-randomized with half of each pre-calving group being offered either the H or L level of feeding in early lactation (weeks 6 to 18), thus forming four subgroups of 25 heifers: HH, HL, LH and LL. The level of feeding in late pregnancy for all groups increased towards calving. The high plane heifers consumed 83·6 MJ metabolizable energy (ME) per day on average compared with 64·6 MJ ME per day for the low plane heifers, a proportional mean difference of 0·29 (P < 0·001). After calving, heifers consumed an average of 86 MJ ME per day in week 1 rising to 126 MJ ME per day by week 5. Between weeks 6 to 18 of lactation, the high plane group consumed an average of 146·8 MJ ME per day compared with 119·8 MJ ME per day for the low plane group, a proportional mean difference of 0·23 (P < 0001).

There were no significant effects of feeding treatments on milk yield. Fat yield in weeks 6 to 18 was increased by the high level of feeding in lactation (P < 0001), while protein yields in weeks 1 to 5 and n i weeks 6 to 18 were increased by high plane feeding in pregnancy (P < 0·05) and lactation (P < 0·05), respectively. Heifers receiving the high level of feeding in late pregnancy gained significantly (P < 0·001) more weight than those on the lower level of feeding. All groups lost similar amounts of weight during the first 5 weeks after calving, but there were marked differences in the rate of live-weight gain between weeks 6 to 11 of lactation (P < 0·05 to P < 0·001). In particular, the HL group had the lowest rate of live-weight gain, and this was significantly lower than that of the HH group (P < 0·01).

First ovulation occurred significantly earlier in heifers receiving the high level of feeding in pregnancy P ( < 0·01), but there was no effect of treatment on ovulation detection rate, time to first oestrus, time of first insemination or the proportion of wrongly-timed inseminations. Heifers receiving the high level of feeding in lactation had a successful pregnancy rate to first insemination of 0·42 compared with 0·63 for those on the lower level of feeding (P < 0·05), with the greatest difference observed between the HL group (0·72) compared with the HH group (0·35) (P < 0·01). Embryo loss rate was low in the HL group (008) compared with that in the HH group (0·26; P < 0·l). The net result was that the HH group had a median interval from calving to successful pregnancy of 95 days with an interquartile range of 82 days, whereas the figures for the HL group were 75 and 23 days (P < 0·001). Live-weight change at artificial insemination (AI) and level and change in milk yield at AI had independent effects on reproductive performance and as a consequence net energy output showed the strongest relationship with days to successful pregnancy. Heifers with the highest net energy outputs per day at AI had the longest intervals to successful pregnancy (r = 0·408; P < 0·001).

Type
Research Article
Information
Animal Production , Volume 41 , Issue 1 , August 1985 , pp. 1 - 12
Copyright
Copyright © British Society of Animal Science 1985

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References

REFERENCES

Agricultural Research Council. 1980. The Nutrient Requirements of Ruminant Livestock. Commonwealth Agricultural Bureaux, Slough.Google Scholar
Baishya, N., Morant, S. V., Pope, G. S. and Leaver, J. D. 1982. Rearing of dairy cattle. 8. Relationships of dietary energy intake, changes in live weight, body condition and fertility. Anim. Prod. 34: 63–70.Google Scholar
Ball, P. J. H. and Pope, G. S. 1976. Measurement of concentrations of progesterone in fat-free cows' milk: its potential value in studies of reproduction. J. Endocr. 69: 408–418.Google Scholar
Boyd, H. 1972. Weight change and fertility in one herd of dairy cattle. Vet. Rec. 91: 193.Google Scholar
Broster, W. H. 1973. Liveweight change and fertility in the lactating dairy cow: a review. Vet. Rec. 93: 417–420.Google Scholar
Conover, N. J. 1971. Practical Nonparametric Statistics. Wiley, New York.Google Scholar
Ducker, M. J. 1980. The effect of feeding strategy on the reproductive performance of dairy cows. In Feeding Strategies for Dairy Cows (ed. Broster, W. H.Johnson, C. L. and Tayler, J. C.), pp. 13.1–13.2. Agricultural Research Council, London.Google Scholar
Ducker, M. J. and Morant, S. V. 1984. Observations on the relationships between the nutrition, milk yield, live weight and reproductive performance of dairy cows. Anim. Prod. 38: 9–14.Google Scholar
Ellis, P. R. and Esselmont, R. J. 1979. The economics of cattle fertility and reproduction. In Fertility and Reproduction in Cattle. Proc. 2nd Study Conf. Scott. Agric. Coll., Peebles, pp. 5–10.Google Scholar
El-sheikh, A. S., Hulet, C. V., Pope, A. L. and Casida, L. E. 1955. The effect of level of feeding on the reproductive capacity of the ewe. J. Anim. Sci. 14: 919–929.Google Scholar
Hodges, J. 1977. Conception, milk yield and body weight in Holstein cows. Proc. Br. Cattle Breeders' Club 32: 88–93.Google Scholar
King, J. O. L. 1968. The relationship between the conception rate and changes in bodyweight, yield and SNF content of milk in dairy cows. Vet. Rec. 83: 492–494.Google Scholar
McClure, T. J. 1970. An experimental study of the causes of a nutritional and lactational stress infertility of pasture-fed cows, associated with loss of bodyweight at about the time of mating. Res. vet. Sci. 11: 247–254.CrossRefGoogle ScholarPubMed
Marion, G. B. and Gier, H. T. 1968. Factors affecting bovine ovarian activity after parturition. J. Anim. Sci. 27: 1621–1626.CrossRefGoogle Scholar
Mauléon, P. and Dauzier, L. 1965. Variations in the duration of lactation anoestrus in ewes of the Ile-de-France breed. Annls Biol. anim. Biochim. Biophys. 5: 131–143.Google Scholar
Milk Marketing Board. 1978. The association between calving intervals and milk yield. Rep. Breed. Prod. Org. Milk Mktg Bd, No. 28.Google Scholar
Ministry of Agriculture, Fisheries and Food, Department of Agriculture and Fisheries for Scotland and Department of Agriculture for Northern Ireland. 1975. Energy allowances and feeding systems for ruminants. Tech. Bull. 33. Her Majesty's Stationery Office, London.Google Scholar
Mulvany, P. M. 1977. Improving cow fertility. Better Management, Milk Mktg Bd, No. 29, pp. 3–4.Google Scholar
Nelder, J. A. and Wedderburn, R. W. M. 1972. Generalized linear models. J. R. statist. Soc. 135(A): 370–384.Google Scholar
Perrin, D. R. 1958. The calorific value of milk of different species. J. Dairy Res. 25: 215–220.CrossRefGoogle Scholar
Spalding, R. W., Everett, R. W. and Foote, R. H. 1975. Fertility in New York artificially inseminated Holstein herds in Dairy Herd Improvement. J. Dairy Sci. 58: 718–723.CrossRefGoogle Scholar