Management measures before and after colonization of tomatoes in middle sheds

Cultivation management

Site preparation before planting: Generally, 4 to 5 square meters of perishable manure, or 80 to 100 kilograms of commodity organic fertilizer, 4 to 5 kilograms of biological agent, 40 kilograms of compound fertilizer, and rotary tillage to mix soil and fertilizer (in cooler areas should be in winter Good place before. To warm up the shed in advance, the temperature in the shed is stable above 10°C, which means it can be planted on sunny days.

When planting, according to the direction of the shed, Shun direction, generally 70 cm wide row spacing, small row spacing 55 cm, 30 cm spacing, planting 3800 ~ 4000 acres in general, after planting poured water, and then close the greenhouse heating, no more than 35 °C is not ventilated to facilitate the rapid recovery of root growth, and then timely cultivating, mainly to insulation, when the shed temperature is too high, through the top wind, and then with the plant growth in time pruning, when the plant grows to 40 to 50 cm when the stand or pull Wrap around the rope, during this period, each opening a spike of flowers with 15 ~ 20 mg / kg of 2,4-D sticky flowers, can add a small amount of red ink to mark the liquid, so as not to repeat the sticky drug, excessive flowering should be sparse In addition, 3 to 4 days after sticking, select 4 to 5 good fruit types. After opening a panicle and tying a vine, when the plant is sitting on 3 panicles, usually when the first panicle is the size of an egg, stop the seedlings, start topdressing and watering. At this time, according to the dry humidity of the soil, advance or postpone several days, select the sunny morning. , Mushi nitrogen and potassium topdressing 10 to 15 kg, with the top dressing water once, after about 10 days, chasing the second fertilizer, according to the growing trend of the plant fertilizer 15 to 20 kg per mu, when the plants sit 5 layers of fruit can be destroyed Top, so that nutrients are transferred to the fruit.

Pest Control

At the seedling stage, it mainly controls damping-off, and generally does not water at the seedling stage, which can effectively reduce root diseases. The two-leaf period can be prevented with 64% anti-virus 500 times spray or 72% Prec 600 times, 7 to 10 days. Medium-term prevention of leaf mold, early blight, late blight, available 70% thiophanate-methyl 800 times or 500 times chlorothalonil, generally 10 to 15 days of regular prevention. Pay attention to ventilation and dehumidification to reduce the incidence of disease. Since there are no insect pests transmitted in early spring, this tomato has almost no insect infestation. As the growth of the ear is gradually increased, it is generally red in batches in mid-May and marketed according to market picking.

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