NZ Stock Salt Requirement Calculator
Stock sodium and salt requirement
Inputs
Manual herbage sodium entry.
Note: High pasture growth periods, such as spring and autumn flushes, can dilute herbage mineral concentrations, including sodium. Treat regional estimates as a guide only and use a herbage test where available.
Click the colour zone that best matches the farm location. This is a regional estimate only. Replace with a herbage test where available.
Red = 0.04% Na DM
Yellow = 0.08% Na DM
Blue = 0.10% Na DM
Supplement feeds
Select a supplement to auto-fill an average sodium value. If you have a feed test, override the sodium % DM manually.
Water sodium, optional
Existing sodium supplement, optional
Dairy factorial inputs
Used only for dairy cattle classes. Milk production is only used for lactating dairy cows.
Salt product
Salt Requirement
Salt required: g/head/day
Group total: kg/day
Sodium deficit: g Na/head/day
Risk message:
Calculation Details
Assumptions and references used in this calculation
Stock Salt Requirement Report
Exported from Dominion Salt Stock Salt Calculator
Recommendation summary
| Result | Value |
|---|---|
| Salt required per head | |
| Group salt required | |
| Sodium deficit | |
| Risk message | |
| Sodium requirement | |
| Total sodium supplied | |
| Current sodium concentration | |
| Target sodium concentration |
Inputs used
| Input | Value |
|---|---|
| Number of animals | |
| Dry matter intake | |
| Herbage sodium | |
| Herbage DMI | |
| Salt purity |
Feed sodium supply
| Source | Value |
|---|---|
| Herbage sodium supplied | |
| Total supplement sodium supplied | |
| Water sodium supplied | |
| Existing sodium supplement |
| Supplement | kg DM/head/day | Na % DM | g Na/head/day |
|---|
Method and notes
| Item | Detail |
|---|---|
| Calculation method | |
| Class note |
Dairy factorial breakdown
| Component | Value |
|---|
References and assumptions
| Stock class | Basis | Formula / target | Source |
|---|
| Supplement | Na % DM used | Basis | Source |
|---|
| Map colour zone | Default Na % DM | Basis |
|---|---|---|
| Red | 0.04% | User-supplied regional default estimate. |
| Yellow | 0.08% | User-supplied regional default estimate. |
| Blue | 0.10% | User-supplied regional default estimate. |
| Conversion | Basis |
|---|---|
| Feed sodium supply | kg DM x Na % DM x 10 = g Na/head/day. |
| Water sodium supply | mg/L x litres/day / 1000 = g Na/head/day. |
| Salt conversion | Salt required = sodium deficit / 0.3934 / salt purity. Pure sodium chloride is approximately 39.34% sodium by weight. |
Additional notes