When is the tomato seedling transplanted? What are the main points when transplanting? If improper transplanting will bring many problems in the late growth of tomatoes, the following explains in detail:
When is tomato seedling transplanted?
Generally, it is planted in mid-July, and it is easy to get viral disease in early sowing. Late sowing is low in the late stage, affecting fruit ripening and low yield. During the nursery period, in order to prevent rain, sun exposure and viral diseases, the seedbed should be placed in a high dry place, and sorghum, shacks, nutritious paper bags or nutrient seedlings should be used. During the nursery period, the seedlings are not moved, the seedling age is 20-25 days, and the 3-4 seedlings of the seedlings are suitable for colonization. The roots of the large seedlings are fixed and the virus is seriously ill. If there is a phenomenon in the seedling stage, it should be sprayed 1-2 times (500-1000) × 10-6 chlormequat in time.
How to transplant tomato seedlings
Site preparation
The greenhouse autumn tomatoes are planted early, and the external temperature is high. Before the planting, the shading-type shed film should be fastened, and only the upper part of the rain-proof and anti-glare should be left. After the shed film is buckled, the planting hoe is made into a 100 cm wide sorghum or a 50 cm wide ridge, which is combined with a good base fertilizer and filled with water. In the future, when the two spikes are left, the planting distance is 25 cm; when the seed is 3, the plant spacing is 30 cm, and the 667 m planting is about 4,500 plants.
Post-plant management
1. After the temperature management is planted, the wind will be released day and night, and the bottom wind will be closed, and the surrounding area will be closed, and only the middle and upper parts will be released. When the external temperature drops below 15 °C, the wind will stop at night, and it will be controlled at 25-30 °C during the day and 15-17 °C during the night. After the shed was detained in late October, it was ventilated at the top of the shed at noon.
2, 2-3 days after the establishment of fertilizer and water management, when the soil moisture is appropriate, it is necessary to cultivate the loose soil in time, combined with loose soil for ridge cultivation. After the seedlings are slowed down, you can pour 1 water, and then water the guards. Until the emergence of large flower buds, a water is poured, followed by shallow tillage, seedlings, until the first ear fruit grows to the size of the walnut when topdressing and watering, 25 kg of diammonium phosphate per 667 meters. After mid-October, to reduce the humidity in the shed, stop watering. Spray some foliar fertilizer on the ear expansion period.
3, plant adjustment using single dry pruning, leaving 3-4 fruit-shaped fruits on each ear, small fruit varieties can leave 4-5 fruits, remove the rest of the fruit.
4, auxin treatment flowering period using 2,4-D tomato spirit treatment, in order to protect the flowers and protect the fruit. Due to the high temperature of the flowering period, the concentration should be lower than that of the spring tomato.
5, pest control autumn tomato cultivation should pay attention to the prevention and treatment of viral diseases and late blight. In the early stage, attention should be paid to the prevention and treatment of viral diseases. In addition to the selection of resistant varieties, suitable sowing, nutrient seedlings and selection of disease-free seedlings, it is also possible to buckle the shed in advance, which can significantly reduce the amount of mites. If the diseased plant is found, it should be removed in time and washed with soapy water and then replanted. In the middle and late period, attention should be paid to the prevention and treatment of late blight. The cultivation should be strengthened to reduce the temperature, remove the diseased fruit, and spray the zinc and chlorothalonil.
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