Lettuce likes cold climate. What methods can make lettuce yield high?

Today, I will give you a special vegetable lettuce. According to some investigations by the author, the price of lettuce in the northern vegetable market is higher than that in the south. Both the north and the north are cultivated, but because they like warm environment, lettuce in the south will be better. Lettuce has a great demand for growth, which is suitable for simulating the growth of soil or loam in terms of organic matter, water storage and reproduction. The three main varieties include lettuce, lettuce and corrugated lettuce. Edible, delicious, it is a popular vegetable. Can stimulate the secretion of digestive enzymes, enhance appetite, promote human intestinal wall and prevent constipation. Good lettuce is not difficult, and the old farmers share their planting techniques in detail.

One. This is a living habit.

Lettuce is a cold-tolerant vegetable, if the weather is cold, there is no high temperature. If the temperature exceeds 30℃, the germination temperature is higher than 4℃, preferably 15-20℃, which will not cause rhamnose. Its seedlings can resist zero reduction, with seedling growth 15-20℃ and stem growth temperature 1 1- 18℃. Lettuce is high, the temperature changes greatly, the flowering temperature is high, and the temperature is 19-22℃. The reaction is very sensitive to the soil surface moisture state, so the soil should be kept moist. The amount of fertilizer is large, so it is suggested to plant water storage and heat preservation in organic residual soil or loam. For silver acidic soil, the suitable soil pH is about 6.0.

Second, the scope of distribution

Lettuce originated in coastal areas and is cultivated in the wild all over China.

Third, breeding methods.

When the seedlings are ready, the seeds are directly sown on the seedlings, and after watering, 4.5% Pepsi is used 3000 times. 5% Kung Fu vetro 3000 times liquid water promotes underground pests. Per mu of land 15-20 square meters, generally 25-30 grams per mu. Cover with shading net, and then compact. Transplanting is usually carried out in a series range of 32×35cm, with 4800-5200 plants per mu, and the stem-like seedlings are removed to avoid early pumping.

Fourth, planting time.

The planting time of lettuce needs to be determined according to the local climate and variety characteristics. Spring lettuce102-March, and seedling raising in February-March; Lettuce cultivation in summer from April to May; Lettuce seedlings in autumn from July to September. The Yangtze River valley is mainly spring and lettuce, which is usually sown in the first autumn of September 9- 10/0 and harvested in April-May.

Five. cultivation techniques

1, the whole place

Lettuce has weak roots and weak competitiveness. Cultivation before planting 15-2 1 cm, mature organic fertilizer per hectare 120 cm, 80- 100 cm. 7-8 days before planting, water for 3-4 days and cover with film. To flatten, so that the film is close to the ground and the soil is strict.

2. Water resources management

The soil at seedling stage should not be too dry to prevent the seedlings from aging or prolonging. If the rosette is properly controlled, the lotus leaves are rich in development. Borrow enough balls, the water will make the leaves smaller and bitter, and there should not be too much water behind the balls to avoid cracks and soft rot.

3. Fertilization management Fertilization management

Lettuce seedlings have been easily removed after emergence, which can produce a large number of roots and survive easily after planting. Water the root water to be planted for 2-3 days to increase the strength. Before planting lettuce, the top of the top needs to be combined. More than 30 thousand kilograms per hectare, 450 kilograms of calcium phosphate; Or vegetable fertilizer per hectare per hectare: or urea, 450 kg of calcium piperidine and 300 kg of compound fertilizer. Base fertilizer accounts for 60%-65%, and acid soil accounts for 1050 kg.

Keep the soil moist at seedling stage. Every 3-5 days, when you are dry, you should not have too much fat in the later stage of seedling growth. When the plant is 30-40 cm, it should be properly controlled to prevent diseases caused by humidity between plants. Lettuce begins to fertilize. Fertilizer cracks the bottom, leading to decay. At this time, Lettufer fertilizer can be sprayed every ten days, per hectare1.500g, or 0.2%-0.3% borax.

In order to prevent premature smoking or plants, multiple syringes can be used to spray, and 50 grams of syrup per butanol can be used one month after plants are used. 50 kilograms per hectare. Be careful not to spray repeatedly and not to open it, so as not to affect the output and quality. Stop supplying fertilizer to promote stem growth 10 day before harvest. One month after planting, turn it over 7-2 times.

4. Planting. Water regularly to promote root development and maintain soil moisture. If you encounter high temperature during the fixed period, you must do a good job to avoid damaging the seedlings. In China, it must be shallow roots. The roots of lettuce are not very developed. If planted too deep, it will damage the roots of lettuce.

Pest control with intransitive verbs

The main pests of lettuce are cold mold, bacterial rough dwarf disease, Fusarium wilt and aphids. The control of lettuce pests needs a combination of various control methods, including agricultural control, physical control and chemical control. Adopting appropriate rebound method, timely removing water and increasing light transmittance can effectively prevent cold mold and spots. Removal of old leaves and diseased leaves and deep burn therapy are also important physical prevention.

It can also be sprayed with 200 times of Bordess diluent or 500 times of 65% sisen zinc solution, which is effective every 10 day and can also effectively prevent freezing spots. Before sowing, using 10% salt water to float on the seeds has certain influence on preventing spasm. Lettuce has a special disinfectant. Usually in conventional pharmacies, professional disinfectants also have the effect of repelling insects. You can spray essence every time you use it. Can play the role of insect repellent, spraying on leaves and leaves several times, can avoid the cost of nailing in the future. Good lettuce is not difficult, and the old farmers share their planting techniques in detail.

The author here, although the content is not detailed, should be able to play a role, lettuce cultivation must pay attention to all the points mentioned in the article, so as to achieve the purpose of high income. The author hopes that there will be more comprehensive content to show, and everyone will have a better experience. The author will also improve this technology more thoroughly.