1、 Curing method

1. Substrate: lettuce will grow better if it is planted in slightly acidic soil. The soil with good drainage and looseness should be selected. Its root is shallow and its absorption capacity is weak, so sandy loam can be used for planting

2. Light: lettuce is a plant that likes shade and cold, and can't stand high temperature. However, it also needs sunlight and good ventilation, and long-term light exposure will lead to long-term failure

3. Temperature: during the breeding period, the temperature can be maintained at about 15 ℃ - 20 ℃. When the temperature is too high, it needs to be cooled down

4. Moisture: the early stage of lettuce growth is neither dry nor wet, and sufficient moisture is required in the later stage. If the lack of water will lead to the aging and bitter taste of the stem, water it appropriately when the soil is dry

2、 Breeding skills

1. Sowing: lettuce can be planted in spring. Put its seeds on the soil and cover it with a film

2. Winter: lettuce can't endure low temperature. If it's cultivated in winter, it's best to put fertilizer in the greenhouse

3、 Diagnosis and treatment problems

1. Virus disease: lettuce will flower and leave after being infected. It should be treated with 50% carbendazim 1000 times solution every other week. It needs to be sprayed about 4 times in total

2, aphids: use 20% viruses A per catty add 500 Jin spray, can not be used under the sun exposure, should be cool after spraying, cloudy days can be used at any time. p>

4、 Other issues

1. Whether to plant in the field: it can be planted in the field, with wide adaptability and wide planting range. To choose fertile land that can be drained and irrigated, the temperature should be controlled at the most suitable temperature for the growth of lettuce

2. Whether it is poisonous: lettuce is not poisonous and belongs to a kind of vegetables, so it will not be harmful to humans