Autumn lettuce is a hardy variety that can be stored effectively with proper techniques. One common method involves sowing the seeds later in the season and harvesting them before the first frost. Just before harvest, water the plants thoroughly to ensure the soil is moist. The next day, carefully lift the roots and allow them to air dry slightly. Once the leaves are slightly wilted, stand the plants upright in a cool, shaded area. After 4 to 6 days of drying, transfer them to a trench dug on the north side of a windbreak. Arrange the plants root-down, leaning the stems against the trench walls in rows. Cover the stems with wet soil, then add another layer of soil on top. Continue stacking until the trench is full, ensuring the total soil cover does not exceed 30 cm. Maintain the temperature between 0°C and -2°C during storage. If the temperature drops too low, the outer leaves may freeze slightly, but the stems will remain intact, preserving the quality of the lettuce. In case of rain or snow, cover the trench with a plastic sheet to prevent rotting. When needed for sale, dig up the lettuce, remove any damaged leaves, shake off excess soil, trim the old roots, and prepare it for market. Regular checks are essential to maintain optimal conditions and address any issues promptly.
Another storage technique is called "prosthetic storage," which is particularly useful for small lettuce plants. This method allows the plants to continue growing slowly after being placed in a trench. In Yangshuo, a 10 cm wide ditch is dug, and the lettuce is placed inside, spaced about 10 cm apart. The trench is slightly sloped toward the north, and after covering with soil, two-thirds of the plant's height remains above ground. Gently press the soil down and water it lightly to maintain moisture without causing decay. In the early stages, avoid high temperatures, and in later stages, provide insulation to protect against freezing. Adjust the soil cover as needed to keep the internal temperature stable at around 0°C to 1°C. This method requires careful management similar to that used for celery.
For cold storage, group the lettuce into bundles of 3 to 5 plants and place them in 0.03 mm thick plastic bags. Seal the bags and store them on a vegetable rack in a refrigerated room. Maintain appropriate temperature and humidity levels, and this method can preserve the lettuce for up to a week.
When transporting, short-distance delivery can be done using hand carts directly to distribution centers or retail stores. For long-distance transport, use a refrigerated truck to maintain ideal conditions. Choose bamboo or plastic baskets that provide good support to reduce mechanical damage and prevent browning during transit.
Moisturizing Raw Materials
What are the best moisturising ingredients ingredients
Moisturizing ingredients in cosmetics can be divided into the following categories:
1. natural moisturizing factors: this type of moisturizing raw materials mainly include Amino Acids, urea, lactic acid, sodium PCA, etc. They can simulate the skin's natural moisturizing mechanism to provide long-lasting moisturizing effect.
2. Polyols: including glycerin, propylene glycol, butylene glycol, etc. These ingredients have good hygroscopicity, which can adsorb water in the air and provide moisture to the skin.
3. polysaccharides: such as hyaluronic acid, alginate, etc., this kind of ingredients can form a protective film on the skin surface, preventing water evaporation, to provide long-lasting moisturizing effect.
4. Fatty acids: such as fish oil, olive oil, etc., these ingredients can provide moisturization for the skin and improve the dryness of the skin.
5. proteins and peptides: such as serine, collagen, etc., these ingredients can enhance the skin's ability to moisturize, improve skin elasticity.
6. plant extracts: such as aloe vera, rose, witch hazel, etc., this kind of ingredient is rich in active ingredients, can provide the skin with sufficient moisture and nutrition.
Moisturizing Raw Materials,Aloe Vera Extract,Aloe Extract Barbaloin,Aloe Vera Extract Powder
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