How to grow purple leaf lettuce planting techniques of purple leaf lettuce

When it comes to purple leaf lettuce, I believe many people are relatively unfamiliar, because life is relatively rare. Purple leaf lettuce is actually a variety of lettuce, because the leaves are purple and the name, can be eaten raw or fried, eat a variety of ways. Do you know how to grow purple lettuce?

How to grow purple leaf lettuce

1, sowing time: purple leaf lettuce in addition to the hottest season, other times can be cultivated.

2. Selection of seedling site: The annual production of seedling site in Beijing area is open field and protected land for half a year respectively. Usually April, May, September purple leaf lettuce seedlings in the open field. Sunshade and rainproof measures should be taken in June, July and August. From October to March of the following year, it needs to be carried out in protected areas.

3, sowing: planting 1 mu purple leaf lettuce needs 12~15 square meters of seedbed, usually dry seed direct seeding. But summer early autumn, purple leaf lettuce emergence difficulties, the best germination after sowing. Sowing quantity 15~20 grams. Spring and autumn seedling, such as sowing for rapid emergence, can be covered with film mulch, warming and moisture preservation, and then removed after emergence; summer seedling to take shade, cooling and rain prevention measures. Seedling watering, especially plastic plate seedlings, more water, one day in winter and spring, three times a day in summer. No topdressing is needed at seedling stage. Temperature management should be paid attention to when raising seedlings in protected land. The optimum temperature for germination is 18~20℃. Winter and spring when the room temperature is not enough, the use of solar greenhouse seedlings, to strive for more light during the day, at night covered with cold insulation.

4. Seedling division: When sowing for about 10 days, cotyledons are long and two true leaves can be divided into seedlings. The seedlings can be divided into seedlings or nutritious earth seedlings. The distance between seedlings is 5 cm ×5 cm. The seedlings grow at a suitable temperature of 20℃ during the day and 12~14℃ at night. Before planting in winter and spring, we should cool down and practice seedlings. When the seedlings grow to 4 - 5 leaves, they are planted.

Cultivation Techniques of Purple Leaf Lettuce

1. Cultivation and planting of purple leaf lettuce

When planting purple leaf lettuce, you need to raise seedlings before planting. The seeds of purple leaf lettuce should be soaked in warm water for seedling raising, and then germinated. After the seeds grow small buds, they can be planted into the seedbed. When the seedlings grow three leaves, transplant them. Before transplanting, apply 3,000 kilograms of organic fertilizer per mu of land, and level the land. After planting, water the purple leaf lettuce in time.

2. Management of purple leaf lettuce

Purple leaf lettuce in the growth period of water requirements are very high, not excessive watering can also make the soil too dry, people can control according to the weather changes, in addition to purple leaf lettuce growth period also topdressing once, each mu of land can be applied with 100 kilograms of chicken manure, and then apply 20 kilograms of compound fertilizer. Aphids sometimes appear during the growth of purple-leaf lettuce, which needs to be removed by spraying in time, otherwise there will be a large number of insect bites on the lettuce leaves, affecting the quality of purple-leaf lettuce.

growth environment

Purple leaf lettuce is a semi-cold-resistant vegetable, like cold, avoid high temperature. Seeds germinated slowly at 4℃, and the optimum temperature for germination was 18~20℃. Germination rate decreased greatly at 25℃, and germination was hindered above 30℃. The suitable temperature for seedling growth is 16~20℃. The seedlings trained at low temperature can endure-1~2℃ for a short time and can tolerate light frost slightly.

Purple leaf lettuce likes plenty of sunshine, seeds germinate quickly in the light; on the contrary, cloudy days, leaves become small and slender, plant growth thin and weak.

Purple leaf lettuce likes wet environment and is not tolerant of drought. The seed germination period needs sufficient water to keep the seedbed soil moist, which is conducive to seed germination and seedling growth, but it cannot be too dry and too wet to avoid seedling aging and excessive growth.

Purple leaf lettuce has wide adaptability to soil, but the sandy loam with rich organic matter, good permeability and strong ability to retain water and fertilizer is the most suitable. Purple leaf lettuce has short growth period and fast growth speed, so it must have sufficient fertilizer supply, sufficient nitrogen fertilizer and phosphorus and potassium fertilizer at the same time. The plants lack phosphorus at seedling stage, the leaves are few, the leaf color is dark green and the growth is weak, and the lack of potassium affects the leaf weight.

main value

Purple vegetables contain one of the most special substances-anthocyanins. Anthocyanins not only have strong antioxidant capacity, prevent hypertension, slow down liver dysfunction, but also have great effects on improving vision and preventing eye fatigue. Purple vegetables have unique nutritional components, their nutritional value is higher than ordinary green vegetables, the market prospects are better, is the future development direction of vegetable varieties.

Purple leaf lettuce is very nutritious, it contains anthocyanins, carotene, vitamin E, vitamin B1, B2, B6, but also rich in minerals, such as phosphorus, calcium, potassium, magnesium, etc., but also contains a small amount of copper, iron, zinc, selenium. The benefits to the human body are digestion, stimulation of bile formation, cooling blood, promotion of blood circulation, diuresis, sedation, sleep, prevention of intestinal accumulation of waste, and anti-aging and anti-cancer functions. Can also be used as potted flowers, placed on the balcony, you can watch and eat.

The above is a summary of the purple leaf lettuce planting method, I hope to help you oh! In fact, purple-leaf lettuce nutrition is more common lettuce, because it is relatively rare and many people do not understand, there are friends planting lettuce may wish to try to plant purple-leaf lettuce next time oh!