The continuous cloudy snow weather is the main reason for the failure of the greenhouse cultivation in the winter and spring. Generally more than 7-8 days of continuous yin, due to the ground temperature dropped below 10 °C, vegetables are easy to pick roots, leaves turn yellow, starved, and even died. For this reason, corresponding measures must be taken. Fight for more light First of all, we must seize the opportunity of clearing the sky in the short-term and in time to make up for the lack of light and temperature. On cloudy days, as long as it does not snow, it should be uncovered. If continuous cloudy snow is used, as an emergency measure, young fruits on the plants can be removed to prevent fruiting defects. At the same time, continuous cloudy days, lack of light, low temperature, control of water, and easy to form a flower topping, must be promptly removed top flowers, in order to promote normal plant growth. After cloudy snow transfer to sunny management After the snow has turned cloudy, suddenly the grasshoppers are uncovered, and plants are often wilted and withered to death, the so-called “flash seedlingsâ€. At this point, you should return for a short time. After the leaves are recovered, they will be lifted again. This will be repeated until the leaves no longer wilt. If the wilting is heavier, sprayer can be used to spray water and cover the grass. After recovery, it can be opened again. Strong wind The impact of disasters has a destructive effect on the structure of the facilities. The shed film, grass weirs, and scaffolding are lifted, causing damage to facilities and affecting the normal growth of crops. Pre-disaster preventive measures (1) Select high-quality construction materials and construct suitable facilities and booths according to local climate characteristics and geographical location. (2) According to the forecast, before the disaster comes, check the fixing of the grasshopper and the shed film, and the lamination line or pressure bar must be fixed firmly. Post-disaster remedial measures After the disaster, the broken leaves and leaves of the old shed films and plants should be quickly removed, and the shed film and vegetable seedlings should be promptly covered to minimize the loss. Cold damage The impact of low-temperature disasters can cause physiological disorders in vegetables, such as leaf spot, yellowing, wilting, flower topping, abnormal flower and fruit, early flowering or early bolting, and falling and fruit falling. (1) According to the latitude of each area, suitable booths should be built to optimize the photothermal effect of the greenhouse. Frequent cleaning of the surface of the shed film increases the light transmittance. (2) Choose cold-tolerant varieties, and select the appropriate sowing date and planting time according to the local climatic conditions. (3) Strengthen the hardening of seedlings and strengthen the exercise of cold resistance. (4) When the temperature in the greenhouse falls to the required minimum temperature, warming measures are taken. For example, small and medium sized sheds can be added to the greenhouse, coverings can be added outside the shed, and the temperature can be increased by increasing the temperature of the shed. Avoid overheating the shed temperature too quickly. When chilling injury causes yellowing of the plants, 0.5%-1% sucrose + 0.1%-0.3% potassium dihydrogen phosphate mixture can be used to supplement nutrition. When the plants are hiccuped, they should generally not be watered. If the weather starts to get better, the soil is arid, and when watering is necessary, use a kettle to warm the water. Never use cold water to flood the area. In addition, spraying high-efficiency foliar fertilizers to strengthen the growth of vegetables will also help increase the cold resistance of the crops. Thick fog with cloudy days The disaster affected the lack of light in the shed, the temperature was low, the relative humidity of the air was high, the photosynthetic efficiency of the vegetables was reduced, the root growth of the vegetables was inhibited, and the absorption of water and nutrients was affected, and the comprehensive stress resistance was significantly reduced. (1) Clean the film regularly to increase the transparency and light intensity. (2) Use non-drip shed film to increase the light intensity in the shed and increase the temperature of the shed. (3) Reduce the management temperature, implement low-temperature hardening, and increase the cold resistance of vegetables. (4) Within the permitted scope of management of temperature, appropriate removal of grasshoppers for heat preservation and delayed cover curtains in advance can prolong illumination time and increase light quantity. (5) Suspended aluminized film reflector, can increase light, raise the temperature. In addition, laying a silver-gray mulch on the ground can also increase the light intensity between the plants. (6) At the time of cold weather in the continuous fog, the plants with weaker growth or more results are harvested in time, and thinning and fruit thinning are appropriate. (7) When the fog is cloudy, the humidity in the shed is relatively large, and pests and diseases are prone to occur. (1) Even after the storm is over, it is forbidden to uncover the grasshopper at the same time. When the temperature is increased, the use of high temperature at noon can be released for a short time, the amount of wind should not be large, in order to facilitate the emission of harmful gases. (2) Apply foliar fertilizers, supplement nutrition, and enhance plant resistance to cold and disease. (3) Cut off dead branches and spray manually. Management is mainly based on low temperature and less light, gradually increasing light and temperature. RFID Ceramic Anti-metal Tags are usually used in tracking small tools. Such as scalpel, bearing, auto spare parts, etc. And it's also widely used in high temperature, waterproof, rugged and metal environments or hazardous environment. Rfid Anti Metal Tag,Rfid Uhf Anti Metal Tag,Anti Metal Abs Rfid Tag,Ceramic Uhf Rfid Anti Metal Tag Guangdong Xinye RFID Label Application Co., Ltd , https://www.xinyerfid.com
Facilities vegetables to prevent winter disasters