Grass powder is a finely ground feed product, characterized by its small particle size and large surface area, which makes it highly susceptible to environmental influences. During storage and transportation, the nutrients in grass powder are prone to oxidation and decomposition. Additionally, it easily absorbs moisture from the air, leading to clumping. This creates an ideal environment for microorganisms and pests to thrive, potentially causing spoilage and reducing its nutritional value. If not stored properly, grass powder can deteriorate due to mold growth, making it unsuitable for animal consumption. Therefore, maintaining the quality of grass powder requires effective storage techniques aimed at minimizing nutrient loss, particularly of proteins and vitamins.
One of the key factors in preserving the nutritional value of grass powder during low-temperature storage is the maintenance of vitamin and protein content. The primary goal during storage is to create conditions that help stabilize these biologically active compounds and reduce their breakdown. Numerous experiments and practical applications have shown that low-temperature and sealed storage conditions significantly reduce the loss of essential nutrients such as vitamins and proteins. In colder regions of northern China, natural low-temperature environments can be effectively utilized for this purpose.
For safe dry storage, the moisture content of low-temperature grass powder should be kept between 13% and 14%, with storage temperatures below 15°C. When the moisture level reaches about 15%, the temperature should be maintained below 10°C to ensure long-term stability and prevent microbial activity. These conditions are crucial for maintaining the quality and safety of stored grass powder.
Another important measure is the addition of antioxidants and preservatives. The proteins and vitamins present in grass powder can degrade due to oxidation during storage, which negatively affects the palatability and overall quality of the feed. This can lead to animals refusing to eat the feed, thereby reducing its effectiveness and digestive benefits. To prevent such deterioration, antioxidants and preservatives are commonly added. Commonly used antioxidants include ethoxyquin, butylhydroxytoluene (BHT), and butylhydroxymethylbenzene (BHA). Preservatives such as calcium propionate, copper propionate, and propionic acid are also widely used to inhibit microbial growth and extend shelf life.
By implementing these storage strategies, producers can maintain the quality and nutritional integrity of grass powder, ensuring it remains a valuable and effective feed source for livestock.
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