By Cameron McMaster
The number of head marketed per hectare per annum (turnoff) is the single most important factor that influences flock profitability and gross margin.
Maximising the turnoff per hectare involves the following aspects:
- Flock Composition - Maximum number of ewes in relation to total flock - minimum 60%
- Lamb Growth Rate - The faster the lambs grow, the earlier they can be marketed at better prices, freeing production resources for a higher relative number of breeding ewes. The early marketability of lambs is therefore the key to higher ewe numbers, more lambs to market and higher profitability.
Stocking Density - Maximise turnoff per hectare by carrying the optimum number of ewes for your particular situation. The correct balance needs to be found between ewe productivity and stocking density. Maximising return per hectare does not equate to maximising return per ewe. Figure 1. illustrates how stocking density influences productivity per animal. Stocking density must be set a level which will maximise return per hectare from ewes capable of efficient production at that level.
Figure 1. Stocking density in relation to Ewe Productivity and Production per hectare (Voermol Feeds, SA)
Production per hectare is maximised by an increased number of ewes at a feed level that optimises production per unit of feed. At this level ewes face competition for feed. To achieve this level of production ewes must be genetically adapted to these conditions - which relates to the crucial importance of the next aspect.
- Type of Sheep - Ewes must be hardy, easy-care and efficient converters of even low quality feed. They must be non-selective grazers. They must have high reproduction rates, good maternal ability for high lamb survival and good milking ability for high lamb growth. Plain bodies and the optimum relationship between wool production and body size (WPP%) are essential attributes of the type of sheep capable of this level of production under hard commercial conditions. High wool production potential impedes reproduction and growth rate. Fine wool of the highest possible quality will enhance returns.
- Management planning - Plan lambing time in relation to maximum fodder flow, wean early and consider Feedlotting or marketing to Finishers. Good hygiene and animal health management is important to consolidate success.
- Dohnes are the ideal breed with which to maximise profit because:
* Financial data in respect of the 2003 results, upon which this document is based, was supplied by Andre Fourie of Anker Agric Consultants, Bredasdorp, South Africa.