How to grow tomatoes in winter and spring

The sowing date for winter and spring pods of tomato is generally set in the late September to early October, late November to early December, and the seedling age is about 60 to 70 days. Seed soaking, germination The tomato seeds are placed in warm water at 55°C and soaked for 15-20 minutes. After the water temperature drops, soak it for another 5-6 hours, remove it, rinse with clean water, soak it in 1% potassium permanganate solution for 10-15 minutes, sterilize it, rinse it with clean water, wrap it with cloth, put it in pot or In the bowl, maintain the temperature between 25°C and 30°C in a warm place, and 2-3 days later, the buds should be put together and sowed in the nursery box or nursery box. In addition, it can also be used for sand precipitating, soaking tomato seeds, adding 2 times the amount of moist sand into the container, covered with a damp cloth, keep at 25 °C, the sand can not dry, 2-3 days after the bud out Qi.

First, sowing: high-quality bed soil nursery, seedlings developed well, plants robust, flower bud differentiation. The first step is to raise the seedlings. The thickness of bed soil should be 6-7 cm, and the foot water should be poured. After the water seepage, 3 cm thick nutritious soil should be spread and 2 times of water should be poured. After water infiltration, use a wooden stick to draw a shallow ditch. After sowing, cover 1 cm of nutrient soil (mixed with peat and vermiculite in a ratio of 4:1. Each side adds 10 kg of decomposed chicken manure and 1.5-2 kg of nitrogen and phosphorus. Potassium compound fertilizer, fully mixed). The subsoil should be moistened to ensure that the seed is water-absorbent, the topsoil is loose and dry, and the damping-off disease and leggy are controlled during the seedling period. Use 50% carbendazim WP to incorporate nutrient soil to prevent damping-off. After sowing, the seedlings are buckled by small plastic sheds, which are insulated and moisturized. Keep room temperature at 25 °C -28 °C, at night, not less than 23 °C, and the ground temperature is 15 °C -20 °C. When 80% of the buds started to top the soil, the plastic film was peeled off in time. After the seedlings, the temperature in the daytime is 18°C-20°C, nighttime 12°C-14°C, and ground temperature 20°C, which can promote the development of the root system, and the seedlings are thick and robust. No watering before transplanting.

Second, nurturing strong seedlings: strong seedlings is the basis of disease-resistant and high yield. Tomato seedlings showed short thick stems, large and thick leaves, 7-8 leaves with large buds. Winter and spring seedlings age 50-60 days, seedling temperature, moisture should not be too large to prevent seedlings grow. The general daytime temperature is around 25°C and the nighttime temperature is around 15°C. The temperature is too low and prone to malformation. Winter and spring seedlings need to be divided into seedlings, which are carried out in three true leaves. Separating seedlings is conducive to promoting new roots and nurturing strong seedlings.

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