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Dairy R&D in SA

Title Date Discipline Extract Keywords
DAIRY PRODUCTION EXPERIMENTS FOR FARMERS IN THE DEVELOPING SECTOR.

Discipline: management; 

 

 Nguni, Jersey, crossbred, milk production, subtropical environment
Milk fatty acid concentration as affected by breed and stage of lactation.

Discipline: dairy & health; 

Background provided by the authors:

 desaturase activity, genotype, pasture, conjugated fatty acids
INTEGRATED CONTROL OF LIVER FLUKE IN DAIRY CATTLE.

Discipline: disease; 

With my regular column of DAIRY R & D IN SA on the website, I from time to time will give feedback on research projects which Milk SA funds. This will deal with progress and plans for the next year or phase. This project by the researchers at UKZN is in its first year of implementation and is envisaged to continue to at least 2019.

 bio-control, snail, alternate host, Fasciola, metacercariae
GREENHOUSE GAS EMISSIONS AND CARBON STORAGE IN PASTURES

Discipline: grazing/pastures; 

 kikuyu-ryegrass, shallow till, methane, carbon storage
BLOOD PROTEIN CONCENTRATIONS IN SMALLHOLDER JERSEY COWS.

Discipline: nutrition/feeding; 

Smallholder production systems often lack feed sources with sufficient nutrients to support milk production. Of particular significance is the level of protein in the diets during early lactation. The authors referenced below therefore investigated a scenario of this kind by measuring serum protein concentration of pre-calving and early lactation Jersey cows kept under semi-intensive management on smallholder farms.

Jerseys, smallholder, serum protein, albumin, creatinine, energy balance
ARE HIGH POTASSIUM LEVELS IN PASTURES A CAUSATIVE FACTOR OF MILK FLOCCULATION?

Discipline: milk; Key words: processing, casein integrity, Alizarol test, potassium, milk fat.
A MODEL TO CALCULATE GHG EMISSIONS ON SA DAIRY FARMS.

Discipline: environment; Keywords: Carbon dioxide equivalents, dairy production, methane, nitrous oxide.   
SPOILAGE POTENTIAL OF BACTERIA ISOLATED FROM DAIRY PRODUCTS.

Discipline: contamination; Key words: identification, spoilage, Chryseobacterium, Empedobacter, dairy  
DAIRY FARM GREENHOUSE GAS (GHG) EMISSIONS VERSUS THE GLOBAL BASELINE AND GHG TARGETS FOR THE SA INDUSTRY.

The Dairy Sustainability framework (DSF) of the IDF proposed that the Baseline for the global dairy sector should be set at the FAO (2013) figure of 2.9 CO2 eq per kg of fat and protein corrected milk (FPCM). It is accepted that different countries will vary substantially as GHG emissions are influenced by milk yield, feeding practices and efficiency of production. Thus, the figure for some developed country industries is as low as 1.6 CO2 eq per kg FPCM, whereas the figure of Sub-Saharan Africa is 9.0 CO2 eq per kg FPCM.
PREVALENCE OF MASTITIS ORGANISMS IN PASTURE-BASED AND TMR SYSTEMS.

In recent years, there has been an increase in the prevalence of environmental pathogens as a cause of within udder infections in dairy cattle. Increases in prevalence could potentially be ascribed to improved control methods for contagious pathogens, difficulties in controlling pathogens from an environmental reservoir and the ability of Streptococcus uberis and Escherichia coli to persist in the udder. Streptococcus uberisshowed an increase in prevalence over an 11-year study period (1996–2007) in South African dairies.