The management of seedlings to planting is mainly the management of temperature and humidity. After the sub-seedling is completed, warming and moisturizing measures should be taken immediately. Keep the temperature between 25°C and 30°C during the day and 15°C-18°C during the night. Grasshoppers should be covered as early as possible. If the weather is fine and the temperature inside the greenhouse is too high, shading may be appropriate to prevent the loss of water and wilting of the seedlings before the root system is restored. This period of time is generally not ventilated, maintaining a high air humidity in the shed. After 5-6 days, the heart and leaves of the seedlings begin to grow, indicating that the sapling has ended. After easing the seedlings, it is mainly to fully utilize the light, enhance the photosynthesis of the seedlings, and exercise the seedlings by controlling the soil and air temperature and humidity of the seedbeds to cultivate strong seedlings and enhance the resistance of the seedlings. During this period of time, ventilation should be increased, and the temperature should be appropriately lowered, especially the night temperature, in order to prevent leggy growers. When ventilating, care should be taken not to suddenly pass through the wind, otherwise it will cause "flashing seedlings", causing the leaves to wilt and dry. Sudden exposure on a continuous cloudy day or after a sudden snowfall can also result in "flash sprouts." After easing the seedlings, watering should be controlled. If the soil moisture is poor and the seedlings are seriously wilted, a small amount of warm water can be sprayed on the pods. After water spray, cultivators should be promptly culled to eliminate soil compaction, improve sensation, and promote root development. The cultivator depth should be 1.5-3 cm. There is generally no lack of nutrients in the seedbed. In case of fertilizer deficiency, some decomposed organic manure may be applied, and 0.3%-0.5% potassium dihydrogen phosphate or urea aqueous solution may be used for foliar spraying. In order to cultivate strong seedlings and improve their stress resistance, seedlings are generally trained 5-7 days before planting. The main measure of exercise is cooling and controlling water. The bed temperature during the day can be reduced to 15°C-20°C, and the temperature at night can be reduced to 5°C-10°C. Under the premise of seedlings not being frozen, the night temperature should be reduced as much as possible. Increase the temperature difference between day and night, increase the amount of ventilation, and gradually bring the seedbed temperature closer to the temperature of the production site. With the low-temperature exercise to control the watering, to prevent the emergence of re-vigorous growth, in order to improve the adaptation of the seedlings to the external environment and the survival rate after colonization. Portable videoscope is suitable for human designing,one-hand to operate for taking pictures and bending the articulation at same time.Portable videoscope widely using in automotive,casting and parts processing,pipelines container manufacturing,pressure vessel and so on. Portable Videoscope,Portable Videoscope Equipment,Hd Portable Videoscope,Camera Portable Videoscope Zhengzhou Runde Dellonscope Co.,Ltd. , https://www.china-borescope.com
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