In the early spring, the temperature is low and the light is weak.
A kind of anti-rotation. The minimum temperature for germination of fruit and vegetable seeds is 11 ° C ~ 12 ° C, and leaf vegetables are 0 ° C ~ 4 ° C. Under normal circumstances, no seedlings appear after 7 days of sowing, indicating that the seeds have rotted. The precautionary measures are to choose a sunny and warm day to sow, using an electric hotbed or a hot-bedbed seedling, thickening the covering, etc., to increase the temperature of the seedbed.
Second, prevent "wearing a hat." "Caps" means that when the cotyledons are unearthed, they will be pulled out of the soil, which affects the normal development and photosynthesis of the cotyledons. The reason is that the bed soil is too dry and the soil is too thin. The precautionary measure is that the bottom water of the seedbed should be poured, and the thickness of the cover soil should be appropriate. Generally, the small seed cover soil is 1 to 1.5 cm, and the medium seed is 1.5 to 2 cm. Before sowing until the emergence, the bed is covered with mulch to keep the soil moist.
Three disease prevention roots. Cold roots, roots and roots are all roots. The ratio of organic fertilizer and bed soil in the nursery bed is generally 1:1. If the unfertilized organic fertilizer is applied or the fertilization is too much, the rooting phenomenon is easy to occur. After the seedlings are burned, the edges of the leaves are yellow and the leaves are shrunk. Once rooting occurs, water can be poured into the bowl to reduce the concentration of fertilizer and increase ventilation and drainage. The roots and roots are caused by low bed soil temperature and high humidity. Its performance is that the leaves are yellow and the seedlings stop growing. The precautionary measures are to try to increase the temperature of the seedbed, reduce the amount of watering, carry out cultivating and loosening the soil, and reduce the humidity by ventilation.
Four anti-frozen seedlings. The measure to prevent stunting is to increase the temperature of the seedbed as much as possible in the early stage and promote root development. In the later stage of nursery, if the seedlings are long, the humidity of the seedbed should be reduced, the light intensity and illumination time should be increased, the ventilation should be increased, and the method of controlling the seedling growth should be avoided by using less watering or no watering.
Five anti-flash seedlings. In the spring, as the outside temperature and the temperature in the nursery bed increase, it is necessary to increase the amount of ventilation. When the temperature in the shed is higher than 25 °C, if the air is ventilated from the bottom of the shed, sweeping the wind will hurt the seedlings. This phenomenon is called flash seedlings. The prevention measures are timely ventilation when the temperature in the shed reaches 20 °C. When the temperature in the shed is higher than 25 °C, the ventilation at the top of the shed should be ventilated. The size of the vent and the length of the venting time should be used to adjust the temperature of the seedbed. ventilation.
Hyaluronic acid is an acidic mucopolysaccharide, which was first isolated from bovine vitreous in 1934 by Meyer, Professor of Ophthalmology at Columbia University. With its unique molecular structure and physicochemical properties, hyaluronic acid shows a variety of important physiological functions in the body, such as lubricating joints, regulating the permeability of blood vessel wall, regulating the diffusion and operation of protein, water and electrolyte, promoting wound healing and so on.
Main purpose
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Beauty function
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