How To Save Hay That Has Been Rained On

Salvaging Rain-Damaged Hay: A Practical Guide

Rain on hay can significantly reduce its quality and increase the risk of spoilage and even fire. Implementing timely and effective strategies is crucial to minimize losses. This guide outlines proven methods for salvaging hay that has been exposed to rain.

Assessing the Damage

The first step is to accurately assess the extent of the damage. Factors to consider include:

• Rainfall Amount: Heavier rainfall saturates the hay more thoroughly, increasing the potential for mold and nutrient loss.
• Hay Maturity: Mature hay is generally more resistant to rain damage than immature hay due to its thicker stems.
• Hay Density: Densely packed bales retain more moisture, creating a favorable environment for microbial growth.
• Drying Time Remaining: Hay that was nearly dry when rained on will likely suffer less damage than hay that was freshly cut.
• Weather Forecast: Knowing the forecast is vital to determine if conditions will improve or worsen the situation.

Visually inspect the hay for discoloration, mold growth, and musty odors. Use a hay moisture tester to determine the internal moisture content of the bales. Moisture levels above 20% significantly increase the risk of spoilage.

Immediate Actions

Prompt action is essential to mitigate the negative impacts of rain. Here’s a breakdown of steps to take immediately following a rainfall event:

• Tedding or Raking: If the hay is still in the swath or windrow, tedding or raking can help spread it out and increase air circulation. This accelerates the drying process.
• Turning Bales: If the hay is already baled, turning the bales can expose the wetter sides to the air and sunlight. Use a bale turner or loader for this task.
• Monitoring Internal Temperature: Use a hay probe to monitor the internal temperature of the bales. Rising temperatures indicate microbial activity and the potential for spoilage.

Drying Strategies

The primary goal is to reduce the moisture content of the hay to a safe level for storage. Several drying strategies can be employed:

Natural Air Drying

This method relies on natural air circulation and sunlight to evaporate moisture. Effective natural air drying requires the following:

• Adequate Sunlight: Sunlight provides heat, which accelerates evaporation.
• Good Air Circulation: Air movement carries away moisture vapor, promoting further drying.
• Proper Bale Spacing: Leave adequate space between bales to allow for air circulation.
• Dry Ground: Ensure the bales are placed on dry ground to prevent moisture absorption from below.

Monitor the hay's moisture content regularly using a hay moisture tester. Continue drying until the moisture level is below 20% for small square bales and below 18% for large round or square bales.

Forced Air Drying

Forced air drying uses a fan or blower to circulate air through the hay, significantly accelerating the drying process. This method is particularly useful in humid conditions or when time is limited.

Forced air drying systems can be designed for individual bales or entire stacks. Consider the following factors when using forced air drying:

• Airflow Rate: Ensure adequate airflow to effectively remove moisture.
• Air Temperature: Slightly warming the air can further accelerate drying, but avoid excessive heat, which can damage the hay.
• Drying Time: Monitor the moisture content regularly to determine the optimal drying time.

Properly designed and operated forced air drying systems can significantly reduce spoilage losses and improve hay quality.

Chemical Drying Agents

Chemical drying agents, also known as hay preservatives, can be applied to the hay during baling to inhibit microbial growth and reduce spoilage. These products typically contain propionic acid or other organic acids.

Consider these points when using chemical drying agents:

• Application Rate: Follow the manufacturer's instructions carefully to ensure proper application.
• Moisture Content: Chemical drying agents are most effective when applied to hay with a moisture content slightly above the safe storage level.
• Cost: Factor in the cost of the drying agent when evaluating its economic feasibility.

While chemical drying agents can be helpful, they are not a substitute for proper drying practices.

Storage Considerations

Proper storage is crucial to maintain the quality of salvaged hay and prevent further spoilage. Key storage considerations include:

• Dry Location: Store the hay in a dry, well-ventilated location, such as a barn or shed.
• Elevated Platform: If outdoor storage is unavoidable, place the bales on an elevated platform to prevent moisture absorption from the ground.
• Bale Spacing: Leave adequate space between bales to allow for air circulation.
• Monitoring: Continue to monitor the internal temperature and moisture content of the bales during storage.

Consider covering the hay with tarps or other protective materials to shield it from rain and snow, but ensure adequate ventilation to prevent condensation buildup.

Addressing Mold and Spoilage

Despite best efforts, some mold and spoilage may occur. It is crucial to identify and manage affected hay to prevent health risks to livestock.

• Discard Severely Moldy Hay: Hay that is heavily contaminated with mold should be discarded to prevent livestock illness.
• Dilute Slightly Moldy Hay: Slightly moldy hay can be diluted with good-quality hay to reduce the concentration of mold spores.
• Monitor Livestock: Observe livestock closely for any signs of illness after consuming salvaged hay.

Consult with a veterinarian or animal nutritionist for guidance on managing moldy hay and ensuring the health of your livestock. Testing suspect hay for mycotoxins is advisable.

Economic Considerations

Salvaging rain-damaged hay involves costs, including labor, equipment, and drying agents. Conduct a cost-benefit analysis to determine the most economically viable strategy.

Consider the following factors:

• Value of the Hay: Estimate the market value of the hay if it were undamaged.
• Cost of Salvage Efforts: Calculate the cost of labor, equipment, and drying agents.
• Potential Losses: Estimate the potential losses due to spoilage and reduced hay quality.

Compare the cost of salvage efforts with the potential losses to determine if salvaging the hay is economically worthwhile.

Key Takeaways

Salvaging rain-damaged hay requires prompt action and careful management. Here are the key takeaways:

Assess the damage quickly and accurately. Implement drying strategies based on weather conditions and available resources. Prioritize proper storage to prevent further spoilage. Monitor hay quality and livestock health closely.

By following these guidelines, producers can minimize losses and maximize the value of their hay crop, even in challenging weather conditions. Consulting with agricultural extension specialists or experienced hay producers can provide additional insights and tailored recommendations.