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INTRODUCTION TO DAIRY HERD HEALTH MANAGEMENT
- 1. Introduction
- 2. MAIN OBJECTIVE OF DAIRY HERD HEALTH PROGRAM • The main objective is to improve productivity by optimizing milk yield and quality under the particular prevailing environmental and management conditions. This objective is achieved by: • Promoting reproductive efficiency in the dairy herd • Reducing the effects of important diseases • Providing optimum feeding • Promoting reproductive efficiency
- 3. Reproductive Performance Targets • These vary depending on the climatic conditions and the breed. • The table contains targets estimated for Australia and New Zealand with similar environmental conditions with Sub-Saharan Africa. • Unfortunately, performance targets are not yet fully available for Zambia.
- 4. zambia australia uk Mean age at first calving (months) 36 24 24 Mean calving interval (days) 540 365 365-400 Mean interval calving to first estrus (days) - 60 60 Mean interval calving to conception (days) - 83 83-115 Mean length of lactation (days) 280 305 Mean dry period 65 65 Culling rate for reproductive inefficiency (%/yr) 11.8 <10 <10 Abortion rate Conception rate Heat detection efficiency
- 5. note • Performance targets for your participating herds could be determined from previous records, taking the mean.