The old film used in vegetable farming has caused significant losses for farmers. After just a short period of use, the film's fogging and drip performance begin to deteriorate. On cloudy mornings, the greenhouse tends to develop condensation, leading to numerous dewdrops on the surface. These droplets often turn into dripping spots, which can accumulate over time. In cases of prolonged cloudy or snowy weather, excessive fog, dripping, and poor light transmission can severely affect the growth of vegetables inside the greenhouse. This creates an environment that is ideal for disease development, leading to reduced yields, and in some cases, total crop failure, resulting in serious financial losses.
To identify whether the film is old or not, there are several effective methods. The most straightforward way is to check the production date and shelf life printed on the certificate inside the packaging. This gives you a clear indication of how long the film has been stored.
Another method is to visually inspect the film. Since no anti-drip agents were added during its manufacturing process, these additives start to precipitate about two months after production. The longer the film is stored, the more precipitation occurs, reducing the film’s ability to prevent water droplets. As a result, the surface becomes stickier and less glossy. Some sellers even sprinkle talcum powder on the surface to mask this issue, making the film appear cleaner and less sticky. However, the overall light transmission of the film decreases significantly, especially when exposed to sunlight. Compared to new films, the difference in transparency is quite noticeable.
You can also test it by touch. New films feel soft and smooth when touched, while old films tend to be harder, with a rough texture and a thick, rigid feel. When rubbed between your fingers, new films make very little noise and show minimal wrinkling, whereas old films produce a lot of noise and have more visible creases. When pulled, new films are flexible and resistant to tearing, while old films are more brittle and prone to breaking easily.
By using these simple inspection techniques, farmers can avoid using old, ineffective films and protect their crops from unnecessary damage and loss.
Feed Supplement for animals
A feed supplement is a product that is added to an animal's diet to provide additional nutrients that may be lacking in the animal's regular feed. Feed supplements can come in many forms, including powders, pellets, liquids, and blocks, and can contain a variety of nutrients such as vitamins, minerals, amino acids, and probiotics. They are commonly used in livestock and poultry production to improve animal health, growth, and productivity. Some common feed supplements include calcium supplements for laying hens, probiotics for gut health in pigs, and electrolyte supplements for horses.
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