In the process of breeding tomatoes, due to the high temperature in the nursery, low temperature difference between day and night, excessive nitrogen fertilizer application, high humidity, or failure to transplant the seedlings in time, the tomato seedlings tend to be slender and thin, forming leggy seedlings. For the cultivation of leggy seedlings, the following measures should be taken to promote growth. First, the scientific application of basal Before planting Shizu base fertilizer, basal fertilizer to fully decomposed organic fertilizer, Mushi can be 3000 ~ 3500 kg, while using a certain amount of phosphorus and potassium fertilizer, control the application of nitrogen fertilizer, to prevent excessive nitrogen fertilizer, speeding up. Second, take legal planting To plant a plant is to plant a portion of the stems of tomato seedlings into the soil in a recumbent manner. By planting the plants, the transpiration of the leaves can be reduced, and the apical dominance of the plants can be inhibited, and the growth of the underground can be promoted, so that dwarfing plants can be obtained. Regulate the effect of growth. In addition, the lying planter can grow many adventitious roots in stems buried in the soil to form a developed root system, enhance the ability of tomatoes to absorb and utilize soil nutrients, and is conducive to the survival of seedlings and the formation of strong seedlings. In this way, the tomato not only grows quickly in the early stage, but also has early flowering results and high yield. When planting and planting, it is best to make the stem obliquely to the north, and then gradually straighten, so that the height of the seedlings is the same to avoid the uneven phenomenon. The depth of lying planting is generally about 10 centimeters, not too deep, so as to avoid the poor permeability of underground roots, causing the occurrence of root diseases, root rot, and other physiological diseases. At the same time, the stalk leaves buried in the soil should be removed to avoid the soil. The rot causes disease. Third, adjust the temperature Tomato plants long seedlings after planting, before easing Huamiao should do a good job of greenhouse insulation, daytime temperature control at 28 °C ~ 30 °C (over 30 °C when the air release), night temperature control at 15 °C ~ 18 °C, in order to promote Huanmiao. Ventilation should be strengthened after easing the seedlings, and the indoor temperature should be appropriately reduced. The temperature should be controlled to 22°C to 25°C during the day, 15°C to 16°C at night, and 10°C to 12°C at the lowest. Through lower temperatures, the seedlings should be properly controlled. Fourth, rational control of water and fertilizer Tomato plants long seedlings after planting to the result before the end of the period, generally no longer fertilize, through the nutrition provided by the base fertilizer to meet the needs of the early growth of tomatoes. Do not apply nitrogen fertilizer after planting until fruit set, so as to prevent extra weight. At the same time to reduce the number of watering, flood irrigation is strictly prohibited. Fifth, appropriate chemical regulation When tomatoes appear to be long, many vegetable farmers will choose to control hormones. When using chemical hormones, we must pay attention to controlling the concentration of agents to avoid over-control. Can be sprayed with 1% paclobutrazol 1500 times, auxinous 600 times liquid or harvested No. 1 800 ~ 1000 times, to promote plant vegetative growth and reproductive balance. Shanghai J.Shine Co.,Ltd , https://www.jshinechem.com