Planting methods and techniques of glass lettuce

Lettuce is high in water content, rich in various vitamins, trace elements, dietary fiber and a variety of minerals, known as the "vegetable queen", raw and cooked food. It has the functions of clearing heat and refreshing spirit, clearing liver and gallbladder, nourishing stomach and hypnosis. It is a kind of healthy vegetable. Raw food is crisp, refreshing, very fresh and tender. Let's introduce the planting methods and techniques of glass lettuce.

I. planting at the right time

1. Glass lettuce is not heat-resistant, so you should avoid the high temperature season when planting, or take cooling measures when planting, such as planting in Guangdong from August to March of the following year, while other areas should be planted according to local climatic conditions.

two。 The seedling age of glass lettuce is 25 days, and it can be planted as long as 4-6 real leaves.

3. When planting, it was planted according to the distance of 14 × 18cm.

4. Soil protection should be taken when planting, and planting water should be watered in time.

5. The planting depth is appropriate to bury the land, not the heart leaves.

6. After planting, organic fertilizer 4000-5000kg, superphosphate 20kg, or chemical fertilizer 50kg were applied per mu.

II. Field management

1. Glass lettuce needs a lot of fertilizer, so the principle of frequent application and more application is adopted.

two。 A small amount of available nitrogen fertilizer was applied 5-6 days after planting, and 15-2 kg / mu after 15-20 days, followed by topdressing compound 10-15kg 25-30 days.

3. Human feces and urine should not be used as topdressing in the middle and later stage of glass lettuce.

4. Glass lettuce needs a lot of water after planting, so it is necessary to properly water the soil when the soil is moist according to the weather conditions after slow seedling, generally every 5-7 days.

5. The watering amount of glass lettuce should be controlled in the middle and later stage, and the humidity in the greenhouse should be controlled for planting in greenhouse.

6. Controlled watering 5 days before harvest.

III. Pest control

1. The common diseases and insect pests of glass lettuce are Sclerotinia sclerotiorum, soft rot and aphids.

two。 Pest control measures:

Select disease-resistant varieties and do a good job in the field.

Autumn, winter and spring are the peak periods of aphid damage. 40% dimethoate emulsion or 2000-3000 times of aphid spray can be used to control aphids.

Sclerotinia sclerotiorum disease often occurs in February-March, and can be controlled by spray of 1000 times of 5% Sukeling wettable powder or 1000-1500 times of 50% prohydantoin wettable powder.

Soft rot often occurs in high temperature and rainy seasons, and can be prevented by spraying 47% Garinon wettable powder 1000 times, or 77% killing wettable powder 500 times.

Stop taking medicine 15 days before harvest.