Defra - Department for Environment, Food and Rural Affairs.

Science Search

Science and Research Projects

Return to Science Search homepage   Return to Project List

Extended lactation in dairy cows - DS0208

Objective
1. Investigation of effects of milking frequency, calving season, genetic merit and nutritional management on lactation length. 2. Technological examination of processing properties of milks produced during extended lactation. 3.Measurement of consequences of extended lactation for animal health, fertility and mammary biology. 4. Investigation of relactation success following extended lactation. 5. Identification of factors affecting shape of the lactation curve, and characterisation of curves. 6. Identification of early lactation predictors of suitability for extended lactation. 7. Extension of an existing dairy herd economics model to incorporate data generated. 8.Challenge of herd model with 'what if' scenarios to devise optimum lactation lengths for individual herd or cows. 9. Application of results to initiate a systems study of extended lactation. 10. Development of practical management and feeding systems for extended lactation. 11. Systems comparison of extended and conventional lactations, examining economic, management, health, welfare, and reproductive aspects. 12. Dissemination of the results to farmers.
Project Documents
• Final Report : Extended lactation in dairy cows   (82k)
Time-Scale and Cost
From: 1996

To: 1999

Cost: £289,018
Contractor / Funded Organisations
University - Scottish Agricultural College, Dairy Research and Consultancy Limited, Hannah Research Institute
Keywords
              
Fields of Study
Livestock