+ Site Statistics
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

An attempt to omit the dry period over three consecutive lactations in dairy cows

Annales de Zootechnie (Paris) 46(5): 399-408, Nov -Dec

An attempt to omit the dry period over three consecutive lactations in dairy cows

In 27 Holstein cows we attempted to omit the dry period over three consecutive lactations, beginning with the first lactation (experimental cows). They were compared to 18 conventionally managed cows (control cows) dried off 2 months before calving. Both groups were fed ad libitum a complete diet based on grass silage during winter. They were at pasture between May and late October. In the first lactation, only 15 experimental cows could be milked continuously until calving. Average duration of the dry period in the experimental cows was not very different in late third and fourth pregnancies compared to controls. In the second lactation, the 13 experimental cows kept for calculations (among the 15 cows milked continuously) yielded 5.6 kg/day (22%) milk less than control cows (mean for the first 36 weeks), but their milk was much richer in fat (4.0 g/kg) and in proteins (3.7 g/kg). The live weight of these cows increased in early lactation (24 kg in the first 2 months) whereas the live weight of control cows decreased (28 kg). Food intake level was unchanged. Blood composition was consistent with the better nutritional balance of continuously milked cows. For the nine experimental cows whose dry period duration was < 5 days in first lactation and > 40 days in second lactation, milk production and feed intake were not different from control cows in the third lactation.

Accession: 003037640

Related references

De-Boer, G.K.nnelly, J.; Shelford, J., 1991: Somatotropin treatment for three consecutive lactations of dairy cows. Agriculture and forestry bulletin: 0th, special issue) 31-32

Larkin J.C.; Fosgate O.T., 1970: Comparisons of 2 different systems of feeding dairy cows for 3 consecutive lactations. Journal of Dairy Science 53(5): 561-565

Larkin, J.C.; Fosgate, O.T., 1970: Comparisons of two different systems of feeding dairy cows for three consecutive lactations. Comparisons were made between groups of Holstein-Friesian cows fed maize silage ad lib. with concentrates at 2 levels, or complete feeds ad lib. in which concentrate to roughage ratios were either 60: 40 or 70: 30. Performance was studied over 3 l...

Huber, J.T.; Wu, Z.; Fontes, C.; Sullivan, J.L.; Hoffman, R.G.; Hartnell, G.F., 1997: Administration of recombinant bovine somatotropin to dairy cows for four consecutive lactations. Effects of long-term administration of recombinant bovine somatotropin (bST) to dairy cows on complete lactational performance [60 (+/- 3) to 284 (+/- 3) d in milk (DIM)] were studied for four consecutive lactations. Beginning on d 60 (+/- 3) post...

Calavas, D.; Faye, B.; Bugnard, F.; Ducrot, C.; Raymond, F., 1996: Analysis of associations among diseases in French dairy cows in two consecutive lactations. Associations among diseases in dairy cows were studied on a two-consecutive-lactation basis by means of a longitudinal and prospective study carried out on 24 French herds. Associations between diseases of a given lactation and diseases of the pre...

Beaudeau, F.; Frankena, K.; Fourichon, C.; Seegers, H.; Faye, B.; Noordhuizen, J.P.T.M., 1994: Associations between health disorders during two consecutive lactations and culling in dairy cows. Data from an observational study, carried out from 1986 to 1990, were used to quantify the effects of 15 main health disorders during two consecutive lactations on the risk of culling in the latter one. The study population consisted of 47 commerc...

Rohr K.; Lebzien P.; Daenicke R.; Schluensen D., 1990: Responses of lactating dairy cows to recombinant bovine somatotropin during two consecutive lactations. In the first year, effects of a sustained release bST formulation were studied in 60 lactating cows. The experiment was divided into a 4-week preliminary period and a 24-week treatment period. Animals were randomly alloted to four treatment groups...

Burton, J.L.; McBride, B.W.; Burton, J.H.; Eggert, R.G., 1990: Health and reproductive performance of dairy cows treated for up to two consecutive lactations with bovine somatotropin. Forty-three pure bred Holstein cows were put on an rbST milk production trial. There were 15 control cows (saline-injected), 15 cows injected with 10.3 mg rbST/d and 13 cows injected with 20.6 mg rbST/d. Injections were initiated between wk 4 and...

Lewczauk, A., 1973: Influence of certain factors on the yield and composition of milk from Polish Black-and-White Lowland cows in Olsztyn province during five consecutive lactations. Part III. Effect of calving interval, service period and dry period. From an analysis of milk yield and milk composition in 5 successive lactations in 687 Polish Black-and-White Lowland cows it was concluded that the optimum calving interval is 336-365 days, the optimum service period 51-80 days, and the optimum dr...

Gross, J.J.; Schüpbach-Regula, G.; Bruckmaier, R.M., 2016: Rapid Communication: Colostrum immunoglobulin concentration in mammary quarters is repeatable in consecutive lactations of dairy cows. Colostrum IgG concentration and yield vary tremendously among farms and cows and among quarters within cows. The present study quantified changes in quarter colostrum characteristics up to 3 successive lactations. First colostrum was quarter colle...