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Dairy R&D in SA

by Heinz Meissner

Click on any of the publications below to read more about the specific topic:


Title Date Discipline Extract Keywords
WATER MANAGEMENT ON FARMS.

Discipline: environment; 

 blue and green water, veld management, water quality, waste disposal
BREEDING OBJECTIVES FOR HOLSTEIN CATTLE IN SOUTH AFRICA

Discipline: breeding;

 

 butterfat yield, economic value, live weight, longevity, milk yield, protein yield, Relative economic value, somatic cell score
A COST-BENEFIT MODEL COMPARING THE CALIFORNIA MILK CELL TEST AND MILK ELECTRICAL RESISTANCE TEST.

Discipline: mastitis; 

 cost-benefit analyses, California Milk Cell Test, Milk Electrical Resistance Test
The effect of low-dose gamma irradiation and temperature on the microbiological and chemical changes during ripening of Cheddar cheese

Discipline: cheese; 

The effect of 4 kGy ionisation irradiation, combined with ripening temperatures at 8°C and 16°C on the ripening of Cheddar cheese was investigated. Changes in cheeses were monitored by sensory, microbiological, and chemical analyses.

 irradiation, sensory and chemical analysis, psychotrophs
Antimicrobial properties of lactic acid bacteria and yeast-LAB cultures isolated from traditional fermented milk against pathogenic Escherichia coli and Salmonella entiriditis strains.

Discipline: microbiology; 

 human clinical samples, fermented milk, lactic acid bacteria, starter cultures
Milk composition as technique to evaluate the relative bioavailability of a liquid rumen protected methionine source

Discipline: nutrition/feeding; 

 milk composition, rumen protected methionine, amino acids, Holstein cows
NON-GENETIC FACTORS AFFECTING FERTILITY TRAITS IN SOUTH AFRICAN HOLSTEIN COWS

Discipline: reproduction;

 

 services per conception, interval to first insemination, days open, dairy cows
Evaluation of genetic trends for traits of economic importance in South African Holstein cattle

Discipline: genetic evaluation; 

 calving interval, EBV, milk fat, milk protein, milk yield, SSC
Winter and spring variation in milk yield and milk mineral composition on pasture in the south-eastern cape

 

Discipline: Composition; 

 genotype, crossbred, pasture, milk yield, mineral content
The live weight of replacement heifers on commercial dairy farms in comparison to breed guidelines.

Discipline: management;

Replacement heifer rearing is often neglected on dairy farms because for farmers the cost of rearing heifers apparently outweighs the advantage of well grown-out heifers. These advantages manifest in early conception and milk yield. To investigate trends in heifer raising, weights for age as a measure of heifer feeding programs were studied in the Western Cape.

 replacement heifer, growth rate, weight for age, Holstein, Ayrshire, Jersey