First, land preparation and planting
The land for growing autumn lettuce requires fertile soil, strong water retention and fertility, and fine farming. Combining arable land into 3-5 square meters of farmyard fertilizer per mu, 30-50 kg of high-nitrogen and low-phosphorus potassium compound fertilizer, 20-30 kg of biological bacterial fertilizer, and 200-400 grams of trace elements, after arable land scraping Do it flat. Then grind with a hoe. The distance between the burrows (line spacing) is 35-40 cm. When autumn lettuce shoots grow to 5-6 true leaves, they can be planted. When planting, choose a cloudy or rainy day, which is conducive to rapid seedling growth and improve the survival rate. Transplanting as far as possible to make the seedling erect, avoid skew, timely watering after planting.
Second, field management
After watering the saplings, when the ground is dry, in the principle of deep and shallow depths, the plan is repeated twice. It should be noted that in case of planting seedlings that are stumbled when they are planted, they must be earth-rooted in a timely manner, because the collapsed seedlings will produce bent bamboo shoots, commonly known as "sticks and bamboo shoots." This will greatly reduce the commercial quality of lettuce and affect the quality of lettuce. income. In case of heavy rainfall, it should be planned in time after the rain is fine. Lettuce likes moist soil, so it should be properly watered to keep the soil moist. About 15 days after the asparagus lettuce planting and about 10 days combined with watering, per acre red pepper 20 grams and 20 kg of ammonium nitrate plus 1 kg of potassium dihydrogen phosphate.
Third, timely harvest
Autumn lettuce harvesting is too early, affecting yield and yield, and harvesting will result in hollow convulsions too late and should be harvested when the outer edge leaves are flush with the growing point before the convulsions.
IV. Pest Control
Autumn lettuce disease mainly includes downy mildew, soft rot, black rot and sclerotia. In the early stage of disease, 72.2% of procarbazine 1000-fold solution or 70% of Anetose 600-fold solution was used to control downy mildew and sprayed 3-4 times. The soft rot and black rot were sprayed with 30% nitrous copper humate 500 times solution or 14% urea copper solution 300 times, and sprayed twice in intervals of 7-10 days. Sclerotinia was sprayed with 50% of Nongli 1000-fold solution or 50% of proploine 1000-fold solution sprayed twice in intervals of 7-10 days. Autumn Lettuce insect pests are mainly Liriomyza sativae, which can be controlled by 40% Wanling 1300 times spray.
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