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Sweet potatoes have specific storage characteristics that must be carefully considered to ensure their quality and longevity.
First, sweet potatoes are highly susceptible to diseases. Their thin skin, high moisture content (65%–75%), and high sugar levels make them prone to bruising and bacterial infections. Common storage-related issues include black spot and soft rot, which can quickly spread if not managed properly.
Second, they are sensitive to temperature extremes. Sweet potatoes do not tolerate high or low temperatures well. If stored above 15°C for an extended period, they may begin to sprout, increasing respiration and nutrient loss, which weakens their resistance to disease. On the other hand, temperatures below 9°C can cause physiological freezing injury. This leads to changes in pectin, making the tubers harder when cooked and disrupting normal metabolism, which reduces disease resistance and promotes rot once temperatures rise again.
Third, they are also sensitive to humidity. When the relative humidity drops below 80%, sweet potatoes start losing water, leading to shriveling and reduced disease resistance. Conversely, excessive moisture—such as in a saturated environment—can cause water to collect on the tubers, promoting bacterial growth and rot.
Fourth, poor ventilation is another major concern. If the storage area lacks proper air circulation, carbon dioxide levels can rise, leading to internal gas buildup. This causes tissue damage, anesthetic effects, and weakened immunity, making the tubers more vulnerable to rot.
To store sweet potatoes effectively, it's important to maintain a cellar temperature between 10–14°C and a relative humidity of 80%–90%. This helps prevent skin cracking, maintains freshness, and ensures good air circulation. The following steps are recommended:
1. **Prepare the cellar**: Before storing, clean and disinfect the cellar thoroughly. Fumigation with sulfur and formalin can help eliminate pathogens and pests.
2. **Harvest at the right time**: Sweet potatoes should be harvested during the frost-free period, ideally on a sunny day. Avoid damaging the tubers during the process.
3. **Select high-quality tubers**: Only choose healthy, undamaged sweet potatoes free from disease or injury. Handle them carefully during storage.
4. **Manage after storage**:
- **Initial phase**: After placing the tubers in the cellar, there is a period of active respiration, which increases temperature and moisture. During this time, frequent ventilation is essential to control heat and prevent black spot. Keep the temperature below 15°C.
- **Mid-phase**: As winter sets in, the tubers' metabolic activity slows down. At this stage, the cellar should be sealed to maintain stable temperature and humidity within the safe range of 10–14°C.
- **Final phase**: In early spring, as temperatures rise, the tubers become more active. Proper ventilation and controlled cooling help prevent sprouting and rot.
By following these guidelines, sweet potato storage can be significantly improved, ensuring better quality and longer shelf life.
Feed Yeast 60% Product Description
Feed grade Active dry yeast/ Feed Live dry yeast/Feed Instant dry yeast is a high-activity Saccharomyces Cerevisiae, refined from high-quality molasses using advanced fermentation production technology,characterized by high purity,strong activity, acid tolerance, antibiotic resistance, and ecological safety,makingit an ideal choice forimproving feed efficiency and ntestinal health in livestock.
Product Features:
1.Main Component: Saccharomyces Cerevisiae ≥20 billion CFU/gram.
2.Mechanism of Action: High-activity dry yeast rapidly multiplies in the gastrointestinal tract, inhibiting pathogenic bacteria, promoting the proliferation of beneficial bacteria,enhancing pH stability, and improving the breakdown, synthesis digestion, and absorption of nutrients.
3.Ecological Safety:No side effects with long-term use.
4.Nutrient-Rich: Contains proteins, amino acids, B vitamins,and oligosaccharides.
5.ProductAdvantages:Quickrevival,wide pH tolerance,and high viable cell content.
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Active feed yeast
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Yeast in animal feed 60
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Active Dry Yeast