- The relative grazing preferences for three saltbush species ...
|Last update: August 18, 2011 10:56:09 AM|
THE RELATIVE GRAZING PREFERENCES FOR THREE SALTBUSH SPECIES AS DETERMINED WITH DORPER SHEEP AT THE GROOTFONTEIN COLLEGE OF AGRICULTURE
G Jordaan & P C V du Toit
Grootfontein College of Agriculture
Private Bag X 529
The relative acceptability of Oldman saltbush (Atriplex nummularia), Israeli saltbush (A. vestita var appendiculata = A. halimus) and Fourwing saltbush (A. canescens) was evaluated in a study of paired species combinations. The three combinations were replicated three times.
The saltbush plantations were force-grazed by Dorper sheep accustomed to saltbush grazing. Previously problems were experienced when "untrained" Angora- and Boergoats and Dorper and Merino sheep were used in the evaluation. The relative percentage utilization of the plants was determined by volume determinations (height X diameter) of each bush prior to and after grazing.
Leaf- and twig samples were collected prior to grazing and analyzed for crude protein, crude fibre, calcium, sodium, phosphorous, potassium and chlorine.
Significant differences between species (p = 0.05) were recorded for acceptability and chemical composition. There is a definite relationship between chemical composition and acceptability.
Annual Research Meeting of the Karoo Biome 1990: 26