In the first case, potential milk production based solely on star grass grazing was simulated for one year.
Figure 2 also shows that highest CP contents in star grass are predicted for June, July and August.
Potential milk production based solely on star grass: figure 3 a shows the DSSTROP prediction for the months in which grass quality, availability and dry matter intake make it possible to meet the metabolizable energy and protein requirements for maintenance and milk production of cows without the use of concentrates.
The predictions produced by the DSSTROP suggest that milk production derived solely from consumption of star grass (Figure 2) can occur only from June to August.
The results of the present research indicate that quality of star grass is low during most part of the year and hardly covers maintenance requirements of cows.