1. Nursery (1) Pay attention to the application of base fertilizer Tomato is a phosphorus, potassium crop, should be applied every 666.7m2 quality manure 4 ~ 5t, urea 20kg, diammonium phosphate 20kg. When deep-sloped during site preparation, the ridge width was 1m. In mid-February, it was flattened to be planted. (2) The proper sowing, cultivation of strong seedlings and large seedlings has proven that proper sowing and cultivation of large seedlings are the key technical measures for tomato production in the solar greenhouse. Because sowing is too early and the tomato blossoms early, the outside climate conditions are not suitable for planting. When the planting is too late and the harvest period is similar to the tomato in the spring greenhouse, the economic benefit is not obvious. Therefore, the sowing date must be strictly grasped. Early maturing tomato varieties have a seedling age of 60 to 70 days, and a suitable sowing date should be around December 10. Seeding soaked with warm scalding, germination, selected sunny morning broadcast on the seedbed. Nursery beds should be treated with carbendazim or thiophanate-methyl or pentachloronitrobenzene (10 g per square meter) in advance to prevent seedlings from falling down and blighting. The entire nursery period to promote the main. During the day, it is 20 to 25°C, and at night it is 12 to 15°C. After the emergence, more light is seen. 30 days after sowing, the seedlings can be divided into seedlings at the time of two leaves. The spacing of the seedlings is from 3 to 4 cm and 8 to 10 cm to ensure that the seedlings have sufficient nutritional area. When there is an appetite tendency, 40% chlormeson 0.5% spray or 20 mg/kg paclobutrazol spray can be used to promote seedling dwarfing and strong seedlings, and early flower bud differentiation can be achieved so that the seedlings can reach the seedling height standard: about 20cm in height, 6 to 8 leaves , Stem thick 0.5cm, generally significant bud, with flower colonization. Otherwise, after the tomato seedlings are planted, they see the water madness, the temperature is low, and it is not easy to flower and set fruit, which can not reach the purpose of precociousness. 2. Colonization in mid-February, the temperature rise in the greenhouse to raise the temperature, the ground temperature of 10 °C, choose to clear the morning Miao set planting, every 666.7m2 seedlings 5000 ~ 6000, watering is small, or the ground temperature is low, not easy to slow seedlings. Timely cultivator, loose soil, keep indoor 20 ~ 25 °C during the day, 15 °C at night, promote seedlings early hair. 3. After the management of flowering after planting, the flowers were stained with 10 to 15 mg/kg of 2,4-D to protect the fruit. In order to achieve early maturation, high yield, and high quality, 2 to 3 spikes per plant are required, and topping in April and mid-April, leaving 3 to 4 spikelets per panicle. Thinning and fruit thinning are required to ensure that the fruit is weighed. About 200g, 6 to 8 spikes per plant. Based on this calculation, the output of 666.7m2 can reach 5t, and the output value is nearly 10,000 yuan. Watering the whole growing period three times, topdressing tomatoes with open field production. 4. Harvest fruit into the white mature period, in time with 800 ~ 1000 times ethephon ripening once, spread evenly to prevent "flower face", at the same time, also properly increase the indoor temperature, up to 28 ~ 30 °C, to facilitate fruit ripening. In this way, you can mention the city for 5 to 7 days and truly achieve the goal of precocity, high quality, and high efficiency. Pest control Because the winter greenhouse tomato production is in the spring environment of high temperature and high humidity, it is easy to induce diseases such as gray mold and leaf mold, which has a great impact on the yield. Therefore, to coordinate the relationship between temperature and humidity, the daytime does not exceed 28 °C, the night is not less than 12 °C, do not form condensation. After the fruit is set, the amount of ventilation should be increased, and at the same time, the chemical agent chlorothalonil should be used for 2 to 3 times to prevent and control the disease.
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