First, the selection of varieties of winter and spring tomatoes suitable for the selection of relatively low-temperature, disease-resistant varieties, such as early morning, early Kui and Xifen 3, Su Kang 5, Su Kang 9, and so on. Second, sowing nursery 1. Seedbed preparation planting one month before sowing in the greenhouse or open field, should choose the terrain Gaozao, drainage and irrigation facilities, did not plant the land of Solanaceae vegetables, made of lotus root width of 1 m ~ 1.2 m, length according to local conditions, To make a sorghum, 10 kg of cooked manure was applied per square meter of seedbed. 2. Seed treatment is soaked in warm water of 55°C for 10 minutes before sowing, and stirring is continued, and soaking in warm water at 25°C for 4 hours to 5 hours. Direct sowing or continued germination, in order to prevent the mosaic virus disease can be soaked with 10% trisodium phosphate for 20 minutes. 3. The sowing method is generally sowed in late October. The seedbed is soaked with water every day before sowing. The sowing rate is about 10 grams per square meter for seedbeds. A layer of medicinal soil is placed before sowing and after sowing. The last layer is covered with an old film. , In the bed and then take a small arch cover film insulation. 4. Seedling management in addition to seeding and seedlings when pouring enough water, usually according to the seedlings to control the watering, 70% of the seedlings peeled off the film, the temperature gradually decreased, maintained at around 25 °C during the day, about 15 °C at night. After one month, seedlings can be transplanted into plastic or paper baskets. After the seedlings were kept at 28°C during the day and 18°C ​​at night, the hair roots were promoted, and after the seedlings were slowed, the temperature in the shed was reduced to around 25°C during the day and around 15°C at night. Strong seedling standards: early maturing varieties about 70 days of age, plant height 15 cm to 20 cm, with buds. 3. One month before planting and planting, the greenhouse must be deep-rooted and full-fertilized. The base fertilizer should be 5000 kg per mu, 50 kg of ternary compound fertilizer and 10 kg of potassium sulfate. After fertilization, the crop should be ploughed twice to make sorghum and planting density. Different varieties and pruning methods may be. Normal early-maturing varieties and single stalk pruning are more dense, and mid-late-maturing varieties and double-stalked pruning should be thinner. Colonization of 4500 to 5000 plants per acre. The middle of the planting worms should be ditched to facilitate irrigation. Before the planting, the mulch must be covered to prevent water evaporation. After the planting, the planting hole should be sealed with soil. IV. Field Management 1. Before temperature is planted on a live tree, keep it at 28°C～30°C during the day and ventilate after exceeding 30°C. After living, keep it at 20°C～25°C during the day and reduce it to about 15°C during the night when the outside temperature gradually rises. When it is high, it should be ventilated during the day. 2. Light does not affect the temperature of solar greenhouses. In the morning, it is necessary to uncover the straw curtain in the morning and cover it later in the evening. When it is cloudy, it is generally necessary to remove the straw curtain. During long-term rain and snow days, it should be maintained during the gap between rain and snow. Uncover some straw curtains. At the same time, a light curtain was placed in front of the post of the greenhouse to increase the amount of light. 3. Top dressing usually before the flowering period, if the basal fertilizer is sufficient, it is not necessary to top-dress. During the fruiting period, several top dressings are required. When the first panicle has been seated, 10 kg of urea is applied per mu. When the fruit of the panicle is harvested and the second and third panicle fruits are rapidly expanding, they are chasing the second fertilizer and the fertilizer amount is the same as above. During the results, two additional foliar sprays can be carried out. Each mu of viable multi-responsive pigment 100 g water 50 kg, or 0.5% potassium dihydrogen phosphate solution evenly sprayed. 4. Plant adjustment When the seedling height is 30 cm, the scaffold should be set up in time. The mid-late-maturing varieties use single-stalked pruning, and the early-maturing varieties use one culm and half pruning. As a result, 3 spikes are called panicles. 3 to 4 fruits per panicle were preserved. The shoots were sprayed once every 3 days at the flowering stage with concentrations of 30 ppm to 40 ppm. Each inflorescence was sprayed twice. 5. Diseases and pests control more tomato diseases, such as gray mold, sclerotinia disease, can be used 50% Suo Keling WP 1000 times to 2000 times the liquid spray, virus disease can be used 1.5% disease disease Ling suspension 1000 times to 1500 times Liquid, or virus A wettable powder 1000 times liquid control, while eliminating aphids. Bacterial blight, leaf mold, early blight and late blight, can be sprayed evenly with 90% diethylphosphorus aluminum wettable powder 400 times liquid and 50% mancozeb zinc wettable powder 500 times liquid. Insect pests mainly include locusts and tobacco insects. The agent can be sprayed with 10% quinone net WP 4000 times solution or 50% phoxim 2,000 times solution. The control of tobacco larvae should be before the pods. When the tomato grows to a size of 3 cm, use 90% crystals of trichlorfon 800 times or 80% dichlorvos EC 1000 to 1500 times. Spray 1 time every other week for a total of 3 sprays. - 4 times.
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