1, timely planting

Since glass lettuce is not heat-resistant, it is necessary to avoid the hot season or to cool down when planting. The Guangzhou area was planted from August to March of the next year, and other areas were planted in time according to local climate conditions. The glass lettuce is about 25 days old, and 4-6 true leaves can be planted, with a row spacing of 1418 cm. Planting soil applies 4000-5000 kg of organic fertilizer per acre, 20 kg of superphosphate, or 50 kg of compound fertilizer. When planting, it should be soiled with roots, timely planting water, planting depth to embed the land is appropriate, not to bury the heart leaf.

2. Field management

Lettuce requires more fertilizer, should be applied in a multi-application, 5-6 days after planting, a small amount of quick-acting nitrogen fertilizer, 15-20 days after the mu compound fertilizer 15-20 kg, 25-30 days after chasing 10-15 kg compound fertilizer, but in the middle In the later stage, human feces and urine can not be used as top dressing. After planting, the amount of water required should be large. It should be watered according to the weather after slow seedling, and the soil is wet. Generally, it is once every 5-7 days. The watering in the middle and late period is not excessive. The greenhouse cultivation should control the humidity in the shed, 5 days before harvesting. To control watering.

3. Pest control

Lettuce mainly includes sclerotinia, soft rot and aphid hazards. It is necessary to do a good job in pastoral cleaning, use disease-resistant varieties, and start from pollution-free cultivation management, and do a good job of prevention. The aphid damage is mostly in autumn, winter and spring. It can be sprayed with 40% dimethoate emulsion 600-800 times solution or 50% sputum mist 2000-3000 times solution. Sclerotinia sclerotiorum occurs mostly in 2-3 months, and can be sprayed with 5% keering WP 1000 times solution or 50% chlorhexidine WP 1000-1500 times solution. Soft rot is prone to occur in high temperature and rainy months. It can be sprayed with 47% galenic WP 1000 times or 77% WP 500 times. The drug is stopped 15 days before harvest.

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