Dairy R&D in SA

Title Date Discipline Extract Keywords
PASTURE YIELD AND ENVIRONMENTAL EFFECT OF NITROGEN FERTILIZATION.

The response of pasture yields to nitrogen (N) fertilization is a long-standing topic of debate. In dairy-pasture systems, N application is often thought to be directly proportional to pasture yield. The question is: is it. This was evaluated using data from 153 pasture camps over five years. Fertilizer application rates were grouped into three treatments: <200, 200-350 and >350 kg N per hectare (ha) and the herbage yield response over the five years was recorded.

METHODS TO DETECT PSYCHROTOLERANT BACTERIA AND PROTEOLYTIC ENZYMES IN MILK.

Age gelation is a process in which there is formation of a three-dimensional protein network within UHT milk which occurs during storage, and is marked by increasing viscosity before observable gelation. In South Africa, the dairy industry loses millions of Rands annually as a result of the condition in UHT milk. As such, there is a need to study and evaluate the possible correlation of variables that may contribute to the occurrence of age gelation in UHT milk.

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
GENOMIC SELECTION: WHAT IS IT AND HOW DOES IT WORK

Discipline: breeding; 

This overview was kindly provided by Prof Esté van Marle-Köster of the University of Pretoria.

Genomics defined in broad terms:

genome, DNA, SNP markers, GEBV’s, chromosome
PRODUCTIVITY OF KIKUYU–RYEGRASS PASTURE AS AFFECTED BY METHOD OF CULTIVATION.

Discipline: grazing/pastures; 

cultivated pastures, pasture establishment, plant production, soil disturbance, tillage
TRENDS IN UDDER HEALTH AND EMERGING MASTITIS-CAUSING PATHOGENS IN SOUTH AFRICAN DAIRY HERDS.

Discipline: mastitis; 

emerging pathogens, mastitis prevalence, reverse zoonosis, South African dairy herds, udder health
WITHIN UDDER INFECTIONS IN PREGNANT HEIFERS WHICH WERE HOUSED TOGETHER AND REARED ON FRESH MILK AS CALVES.

Discipline: mastitis; 

within udder infections, co-housed calves, milk-fed, Staphylococcus aureus, prevalence in heifers
Efficacy of bacteriophage therapy against mastitis-causing Staph aureus.

Discipline: mastitis; 

Staphylococcus aureus, antibiotic resistance, bacteriophages
IMPORTANCE OF DEDICATED R & D FOR THE DAIRY SECTOR

Discipline: industry; 

Structural changes in the SA dairy industry

structure, MPO, SAMPRO, competitive science, demand-driven research, functional farming tactics
LIVE YEAST AS A SUPPLEMENT TO COWS ON LOW AND HIGH CONCENTRATE: ROUGHAGE DIETS.

Discipline: nutrition/feeding; 

live yeast, concentrate:roughage ratio, milk yield, milk composition, DMI, feed efficiency