Appendix B. Variables and units used in the model of body size competition.
| Variable | Units | Definition |
|---|---|---|
| V | kg.ha-1 | Vegetation standing biomass |
| CWS | kg.ha-1 | Cell wall standing biomass |
| CCS | kg.ha-1 | Cell contents standing biomass |
| W | kg | Body size |
| GC | g DM | Gut Capacity - dry matter food contents in the gut |
| RT | h | Mean whole gut retention time / passage time of food |
| RTadj | Effect of food quality on RT | |
| FILLd | g DM.d-1 | Gut capacity constraint on daily food intake |
| Rmax | g.min-1 | Maximum instantaneous cropping rate |
| b | g.m-2 | Vegetation biomass at which intake is half maximum |
| tmax | min | Maximum daily feeding time (=13 h = 780 min) |
| CROPd | g DM.d-1 | Feeding rate constraint on daily food intake |
| Cd | g DM.d-1 | Daily food intake |
| CCi | g DM.d-1 | Daily CC intake |
| CWi | g DM.d-1 | Daily CW intake |
| pCCi | Proportion of CC ingested (0 <= p <= 1) | |
| pCCs | Proportion of CC in the sward (0 <= p <= 0.45) | |
| NDF | g.kg-1 | Proportion of CW in the standing biomass |
| DOM | g.kg-1 | Observed in vivo digestibility of organic matter |
| INDF | g.kg-1 | Indigestible fraction |
| PED | g.kg-1 | Potential extent of digestion |
| PDCWd | g DM.d-1 | Potentially digestible cell wall intake |
| k2 | h-1 | Rate of digestion of CW |
| CCa | g DM.d-1 | Assimilated (digested) CC |
| CWa | g DM.d-1 | Assimilated (digested) CW |
| eCC | MJ.g-1 | Energy content of CC = 0.041 |
| eCW | MJ.g-1 | Energy content of CW = 0.0185 |
| ECC | MJ.d-1 | Energy intake from CC |
| ECW | MJ.d-1 | Energy intake from CW |
| GEd | MJ.d-1 | Gross energy content of digested food |
| FEd | MJ.d-1 | Energy content of faeces |
| UEd | MJ.d-1 | Energy content of urine |
| PEd | MJ.d-1 | Energy content of methane |
| MEd | MJ.d-1 | Energy intake available to metabolism |
| r | MJ.kg-1 | Work of rumination per kg ingested fibre |
| Er | MJ.d-1 | Total work of rumination |
| Eh | MJ.d-1 | Heat production due to fermentation and digestion |
| HEd | MJ.d-1 | Heat increment |
| Ebasal | MJ.d-1 | Basal energetic requirements of a fasting, inactive animal |
| NEd | MJ.d-1 | Net energy available for maintenance and growth |
| Eact | MJ.d-1 | Activity allowance |
| Emaint | MJ.d-1 | Maintenance requirement |
| Gd | Emaint | Profit, or energy available for growth, as multiples of maintenance |