How to quickly peel celtuce (stem lettuce)? Is it a hot or cooling food? What should it not be eaten with? What are the market prices? Plus pollution-free cultivation techniques
Celtuce is also known as green lettuce, stem lettuce, asparagus lettuce, celtuce, fragrant celtuce, thousand-gold vegetable, and lettuce vegetable. It can be cultivated in spring and autumn or overwintered, mainly in spring cultivation, with harvest in summer.So how do you quickly peel celtuce? Is it a hot or cooling food? What should it not be eaten with? What are the market prices? What are the pollution-free cultivation techniques?
How do you quickly peel celtuce?
1. Remove the leaves on the surface of the celtuce and cut away the stale parts of the root.
2. Cut the celtuce into several sections, according to the length you want.
3. Stand the celtuce upright on the cutting board and cut downward to remove the skin.
4. When cutting, be careful not to cut too thickly. Hold the celtuce with one hand, use the other hand to remove the skin downward, then turn it and cut another part.
Is celtuce a hot or cooling food?
1. Celtuce is sweet in taste and cooling in nature. From the perspective of traditional Chinese medicine, it is a cooling food, with the effects of clearing heat and promoting diuresis, and clearing stomach heat. It is relatively suitable for people with a hot constitution.
2. Celtuce is rich in mineral elements such as potassium, sodium, magnesium, calcium and iron. After they enter the human body and are digested by the stomach and intestines, their products are alkaline. From a nutritional perspective, celtuce is an alkaline food.
What should celtuce not be eaten with?
1. Celtuce + honey: Eating celtuce together with honey is not conducive to gastrointestinal peristalsis, and in serious cases may cause gastrointestinal dysfunction, such as diarrhea and other symptoms.
2. Celtuce + Asarum (xi xin): Asarum is pungent and warm, and disperses to release the exterior. The two are not suitable to eat together in terms of function and nature, so people using the medicinal herb Asarum to treat illness should not eat celtuce at the same time, otherwise it will reduce the medicinal effect.
3. Celtuce + cheese: Cheese is a fatty food, while celtuce is cold in nature. Eating the two together easily leads to indigestion and diarrhea. At the same time, when celtuce is eaten raw, it may be contaminated by parasites such as hookworms and roundworms due to incomplete washing, which is harmful to human health.
What are the market prices of celtuce?
Suzhou Nanhuanqiao Market Development Co., Ltd. - celtuce price: 1.20 yuan/kg
Qingdao Huanghe Road Market Operation Service Co., Ltd. - celtuce price: 2.50 yuan/kg
Tianhui Supermarket - celtuce price: 3.40 yuan/kg
Shandong Laixi Dongzhuangtou Vegetable Wholesale Market - celtuce price: 1.40 yuan/kg
Wuxi Chaoyang Co., Ltd. Agricultural Products Wholesale Market - celtuce price: 1.71 yuan/kg
Shandong Kuangshan Agricultural Products Comprehensive Trading Market Management Co., Ltd. - celtuce price: 2.00 yuan/kg
Chaoyang Flowers - celtuce price: 3.40 yuan/kg
On April 17, 2018, the average price of celtuce was as follows: 1.71 yuan/kg (up 0.6%)
Appendix: Pollution-free cultivation techniques for celtuce
I. Requirements for environmental conditions
1. Temperature: The temperature for seed germination is 15-20°C, and germination can occur in 3-4 days. Below 4°C germination is very slow, and above 30°C germination is hindered. Seedlings can tolerate low temperatures of minus 2-3°C. Adult plants have weak cold resistance. The suitable temperature for stem and leaf growth is 11-18°C. When the daily average temperature exceeds 24°C, premature bolting is likely. Below 0°C they are easily damaged by freezing. It is a semi-cold-resistant vegetable.
2. Sunlight: Celtuce is a long-day crop. Long days can promote bolting and flowering, especially high temperature and long days are more conducive to bolting and flowering. Among variety types, early-maturing varieties are the most sensitive, mid-maturing varieties are next, and late-maturing varieties are relatively insensitive.
3. Water: Celtuce has different water requirements at different growth stages. During the seedling stage, keep it moist, not too dry, to avoid the seedlings becoming aged; during the rosette stage, appropriately control water; during the tender stem enlargement stage, water must not be lacking, otherwise the stem will be small, hard in texture and bitter; near maturity, water must not be excessive, to avoid the tender stem cracking or soft rot and root rot.
4. Nutrients: Celtuce has a shallow root distribution and requires loose, fertile loam rich in organic matter. It prefers slightly acidic soil. The absorption ratio of the three elements nitrogen, phosphorus and potassium is 2:1:4.
II. Key points of cultivation techniques
1. Cultivation season: Celtuce has wide adaptability. By selecting different varieties, sowing can be staggered and supply can be year-round. The main cultivation is in spring and autumn. Generally, spring celtuce is sown in September-October and harvested in February-April; summer celtuce is sown in March-July and harvested in June-October; autumn-winter celtuce is sown in August-September and harvested from November to February of the following year.
2. Variety selection: For celtuce harvested in spring, it is advisable to choose varieties with strong cold resistance and relatively early maturity, such as Ziye, Guasihong and Erbaipi; for celtuce harvested in summer and autumn, it is advisable to choose varieties with relatively strong heat resistance and later bolting, such as Kumaiye, Thailand Fragrant Celtuce and Wannianzhuang; for celtuce harvested in winter, it is advisable to choose pointed-leaf and round-leaf types.
3. Sowing and seedling raising: Celtuce can be sown directly or raised as seedlings and transplanted. Off-season cultivation is mostly direct sowing. Before raising seedlings, the seedbed should be carefully prepared, so that the soil is fine, fertility is sufficient and the seedbed surface is level. Generally, the sowing rate is about 2 grams per sq m. After sowing, cover lightly with fine fertile soil and keep the soil moist. After the seedlings emerge completely, thin them in time. The seedling age is 30-45 days, and they can be planted out when they have 5-6 leaves.
4. Planting density: For early-maturing varieties, the plant spacing is 25-28 cm; for mid- and late-maturing varieties, the plant spacing is 30-33 cm. In-season cultivation can be slightly sparser, while off-season cultivation should be denser. Direct sowing uses more seed, but there is no seedling recovery period. Management is more labor-intensive, and attention should be paid to weeding, loosening the soil, thinning and final thinning of seedlings.
5. Fertilizer and water management: Celtuce has relatively strict water and fertilizer management. Slight negligence can easily lead to slender plants and premature bolting, affecting yield and quality. Therefore, in management, lean land should be fertilized, waterlogged land should be drained, and drought should be irrigated. Generally, 2000-3000 kg of decomposed barnyard manure per mu is applied as base fertilizer, with 3-4 topdressings: 1-2 light topdressings during the seedling stage, 1 heavy topdressing during the rosette stage, and 1 topdressing as appropriate during the tender stem enlargement stage.
6. Pest and disease control: The main insect pests of celtuce include aphids, thrips, cutworms and white grubs, which can be controlled with pesticides such as imidacloprid, acetamiprid, abamectin, deltamethrin and chlorpyrifos; the main diseases include downy mildew and soft rot, which can be controlled with pesticides such as Kelu, fosetyl-aluminium, propanocarb, dexon and agricultural streptomycin.
7. Harvest standard: The suitable harvest period is when the top of the tender stem of celtuce is level with the leaf tip of the highest leaf, or before budding. At this time the stem is fully enlarged and the quality is crisp and tender. If harvested too late, the flower stem elongates, fiber increases, the stem skin thickens, the flesh becomes hard, and it may even become hollow or develop root rot, reducing quality.