Effects of a Freeze on Forages

Effects of a Freeze on Forages

Bruce Anderson

If you haven’t experienced a freeze yet this fall, you soon will. And remember, a freeze can cause hazards for using some forages. When plants freeze, changes occur in their metabolism and composition that can poison livestock. But you can prevent problems. Sorghum-related plants, like cane, sudangrass, shattercane, and milo can be highly toxic for a few days after frost. Freezing breaks plant cell membranes. This breakage allows the chemicals that form prussic acid, which is also called cyanide, to mix together and release this poisonous compound rapidly.

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