Lettuce management method

After watering the seedlings scientifically, the number of times of watering should be determined by the condition of soil moisture and growth. Usually 5-7 days a water. When the temperature is low, the amount of water should be small, and the date of watering interval should be long. When the water is growing, the amount of water needs to be large, and the soil should be kept moist. After the formation of the leaf ball, watering should be controlled to prevent the water from being uneven and cause fissure ball and rotten heart. When the protective cultivation begins to bury the ball, watering must ensure the plant's need for water, but not excessive, and control the humidity in the field. It should not be too large to prevent the occurrence of disease.

After cultivating and weeding, planting and weeding should be carried out to increase soil permeability and promote root development.

The top dressing is mainly topdressing, and when the bottom fertilizer is sufficient, no fertilizer may be added in the early stage of growth. At the beginning of the start of the season, the nitrogen fertilizer is chased once with the water to promote the growth of the leaves; the second fertilizer is taken after 15 to 20 days, and the compound fertilizer is NPK. Well, about 15-20 kilograms per mu; when the heart begins to curl inward, apply a compound fertilizer once again, using about 20 kilograms per mu.

Diseases and pests control diseases mainly include downy mildew, soft rot, viral disease, dry rot, and top burning diseases; insect pests mainly include leafminers, whitefly, aphids, and thrips. Diseases and pests should be based on prevention, and field management should be strengthened. For chemical control, low-toxicity, high-efficiency and low-residue pesticides should be used. Attention should be paid to the withdrawal of drugs 15 days before harvest.

The collection period of scientifically harvesting loose leaf lettuce is relatively flexible, and the harvesting specifications are not strictly required, and may be determined according to market needs. The harvest of lettuce must be timely, according to different varieties and different cultivation seasons, generally after 40-70 days after planting, the formation of leaf ball can be harvested by light pressure with a sense of reality, only to strengthen field management, vegetable farmers have good The benefits.

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