Grass Tetany

DISORDER: Grass Tetany (grass stagger or hypomagnesemic tetany)
Plant Species: Wheat, oat, rye, triticale, rye ryegrass and  some perennial cool-season species
Causes: Low bloods levels of Mg (Magnesium) (1-8 mg/100 ml or 18 mg). Occurs usually during gestation and lactation.
Mode of Action: Generally when Mg > 2.2 mg/g in the plant.
Animal Symptoms: Nervousness, muscle twitching, staggering, and eventual convulsions, however the exact etiology is unknown.
Conditions: Soils low in Mg (Magnesium) and P (Phosphorus);
and high in K (Potassium)and N (Nitrogen).
Soils that are hypoxic (low O2), generally heavier textured soils.
When weather condition is cool and cloudy.
Treatment: Treat with intravenous solution with calcium gluconate fortified with Mg and P.
Prevention: 1. Graze forages high in Mg (legumes) – (grow mixture).
2. Lime with dolomitic limestone (contains Mg).
3. Increase P fertilizer and reduce K and N fertilizer when problem occurs.
4. Supplement with Mg oxides in the mineral mix.

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