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Dairy R&D in SA

Title Date Discipline Extract Keywords
NON-GENETIC FACTORS AFFECTING FERTILITY TRAITS IN SOUTH AFRICAN HOLSTEIN COWS Genetics, Physiology and Reproduction

Profitable milk production and genetic improvement in dairy herds depend largely on fertile cows calving annually to initiate a new lactation period. Over the last 30 years, several studies have indicated a decline in the reproductive performance of dairy cows. From the perspectives of many farmers and veterinarians, the reproductive performance of cows is related to the calving interval and services per conception.

 services per conception, interval to first insemination, days open, dairy cows
MANAGING HEALTHY SOILS FOR SUSTAINABLE PASTURE PRODUCTION.

Discipline: grazing/pastures; 

 fertility, microbial biomass, microbial functional diversity, organic matter, total nitrogen, plant production, soil disturbance, tillage
GENOTYPE BY ENVIRONMENT INTERACTION IN SOUTH AFRICAN HOLSTEIN CATTLE IN REPRODUCTION AND PRODUCTION TRAITS

Discipline: genetic evaluation; 

 

 age at first calving, milk production, total mixed ration, pasture
PALM KERNEL EXPELLER AS AN INGREDIENT IN CONCENTRATE SUPPLEMENTATION ON PASTURES

Discipline: nutrition/feeding; 

 by-product, fibre-based concentrate, NDF, milk production, milk composition, rumen fermentation
THE RUMEN ORGANISM MEGASPHAERA ELSDENII CAN ASSIST DEVELOPMENT AND GROWTH OF PRE-WEANED CALVES.

Discipline: calf raising; 

 Megasphaera elsdenii, β-hydroxybutyrate, rumen development, neonatal calves, starter intake, weaning
Genomic tests for heat tolerance.

Discipline: Genetic parameters/QTL’s;

 dairy cow, mammary gland, transcriptomic, thermic stress
IMPACT OF LIVER FLUKE ON DAIRY PRODUCTION AND SUSTAINABLE MANAGEMENT.

Discipline: disease; 

 Fasciola, Lymnaea truncatula, prevalence, seasonal distribution, habitat, electric fencing
ALLEVIATING HEAT STRESS IN COWS BY SHADE STRUCTURES

Discipline: stress;

 shade structure, rectal temperature, Jerseys, heat stress, comfort zone, blood cortisol
FORCED GEOGRAPHICAL DISTRIBUTION OF DAIRY PRODUCTION IN SOUTH AFRICA DUE TO CLIMATE CHANGE

Discipline: environment; 

 climate change, climate variables, Maxent modelling, temperature-humidity index
TERMINOLOGY RELATING TO PROTEIN INSTABILITY IN MILK

Discipline: quality; Key words:  flocculation, gelation, precipitation, clotting, roping, curdling