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Leaf lettuce cultivation techniques
Leaf lettuce is a thermophilic and more fat-tolerant vegetable. Its suitable growth temperature is 15-25°C. It can be planted in all seasons, and it is the most suitable planting period from November of that year to May of the following year. First, soil preparation, sowing, nursery, and site preparation: The selection of seedlings requires loose soil, good air permeability, and the ability to retain water and fertilize the sandy loam. After the seedlings have been sun-dried in the riven soil, the soil is crushed from 1.2 to 1.5 meters and the height of the sorghum is 25 centimeters. The basal fertilizer should be applied to the seedlings, and the organic fertilizer should be used as the decomposer. The basal fertilizer and the soil can be fully mixed and sown. 2. Seeding: It is required to select fresh and full-colored seeds, and do a good job of processing before sowing. The seeds will be sun dried and germinated. The amount of mu seeds is 0.1--0.12 kg. 3, nursery: After sowing, cover the seed with fine soil about 1 cm thick, and drench water moisturizing. After 3 to 10 days after sowing, the seedlings are unearthed. When they grow to 2 or 3 true leaves, they should be thinned, and the thinning should be conducted in sunny weather. Second, transplant seedling colonization. Planting a field of leafy lettuce requires the selection of irrigation and drainage facilities. It is appropriate to use sandy loam with neutral or slightly acidic soils. After Daejeon applied base fertilizer, the ploughshare was used for soil preparation. The rake was 1.5 meters wide (baggage ditch). After opening, the plant was opened and planted. The specifications were 1013 cm. The seedlings could be transplanted to planting trees when they grew to 4--5 true leaves. Mu planting 3500--4000 strains. After transplanting enough rooting water. Third, fertilizer and water management. After planting the seedlings, it is necessary to timely pay attention to fertilizer and water management. After planting, the seedlings should be sprayed every day on sunny days, even for 3 to 4 days, to keep the surface moist, and to exclude the waterlogging in the rain. After 10-12 days of planting, the fertilizer can be topdressed, requiring frequent application and thin application. The best is the decomposed manure, and compound fertilizer can also be applied. Do not use chemical fertilizer for 10 days before harvest to avoid lowering quality. Fourth, timely harvest. The harvest of leaf lettuce should be harvested in a timely manner. When it grows to 10-12 leaves, it is the most suitable harvest period. At this time, the quality of the harvest is the best. Fifth, pest and disease control. The diseases and pests that the leaf lettuce produces are: powdery mildew, blight, canker, aphids, and cabbage caterpillars. Disease prevention and treatment drugs include: carbendazim, extermination disease, thiophanate and so on. Pest control drugs include: trichlorfon and some pyrethroid pesticides. China Agricultural Network Editor