Why do people wrap hay bales in plastic?

People wrap hay bales in plastic mainly to protect the hay, extend its storage time, and improve its use efficiency. Here are some specific reasons:
1. Moisture-proof: Hay is a good feed, but once it gets damp, it will become moldy and deteriorate, affecting the health of animals. Plastic film can effectively isolate moisture from the outside and keep hay dry.
2. Dust and pollution prevention: During storage and transportation, hay is susceptible to dust and other pollutants. Plastic packaging does a good job of sealing in these contaminants, keeping the hay clean.
3. Long-term storage: If hay is exposed to the outside, it will gradually lose nutrients and weight due to wind, sun and rain. When wrapped in plastic, hay can be stored longer and loses less.
4. Easy to carry: The hay bales after plastic packaging are more compact and easy to stack and carry. This is especially important for mechanized operations and can improve work efficiency.
5. Save space: Plastic packaging can make hay more compact and reduce storage space, which is especially important when space is limited.
6. Prevent nutrient loss: The nutrients in hay are easily oxidized by oxygen in the air without protection, resulting in a decrease in nutritional value. Plastic packaging can slow down this process to some extent.
7. Avoid biological damage: Unwrapped hay can easily attract pests such as mice and insects, which not only consume the hay but may also carry diseases. Plastic packaging can effectively prevent the invasion of these organisms.

In short, wrapping hay bales in plastic is an effective protection measure that can ensure the quality and safety of hay, while also providing convenience for storage and transportation of hay. However, it should be noted that plastic materials have a certain negative impact on the environment. Therefore, when selecting and using plastic packaging, environmental factors should also be considered and try to choose recyclable or degradable materials.