– Mark Sulc, OSU Extension Forage Specialist
The recent cold and cloudy weather has raised the concern for higher nitrate levels in forages that could potentially be toxic to animals consuming those forages. It is true that any stress condition that slows plant growth and metabolism can increase the risk of higher plant nitrate levels. This article discusses factors to consider, especially given the recent cold weather we have been experiencing in Ohio and surrounding regions.
Plants readily take up nitrates from the soil, even under colder conditions, and especially since we have plentiful soil moisture to facilitate uptake. Once in the plant, nitrate is converted to nitrite, then ammonia, and finally into amino acids and plant protein. Any environmental stress that significantly slows down plant photosynthesis and metabolism can lead to excessive nitrate levels in the plant because the nitrate uptake from the soil will be faster than its metabolism into plant protein. Such stresses include frost, extended cold weather, cloudy conditions, hail damage, or . . .
Continue reading Potential for Toxic Nitrate Levels in Forages