At present, it has entered the deep winter season. The weather is cold, snowfall and hazy weather, and sunlight, greenhouses and other facilities are prone to environmental conditions such as low temperature, high humidity, weak light, and short illumination time, which are not conducive to the growth of vegetable crops and fruit enlargement. It is prone to disease. To this end, it is recommended that the majority of vegetable farmers make emergency preparations in advance to avoid losses caused by unfavorable weather such as low temperature and snowfall to the production of vegetable facilities. Extreme cold weather measures When extreme cold weather is encountered, effective measures to increase room temperature and ground temperature ensure that crops are not affected by freezing. Current economical and practical temporary heating measures include installation of Yuba, electric heater stoves, warming combustion blocks, air heating lines, and temporary stoves. Yuba heating lamps: Each greenhouse installs 10-15 275W Yuba bulbs, which can increase the indoor temperature by 2°C-4°C. The installation height is 1.5-2.5 meters away from the ground, and it is more than 50 centimeters away from the growing point of the plant to avoid burns. Turns on at low temperatures when the room temperature is too low in the morning, in the morning, and at night. Pay attention to the use of waterproof lights, but also consider the use of electricity load to avoid accidents. Warming combustion block: The warming effect of the warming combustion block is obvious. Each time, the greenhouse use amount is 6-9 blocks, and it can also be used for every 250-300 cubic meters of room space. After the experiment can increase the indoor temperature by 2°C- 6°C. The use time is 1-2 hours before pulling the grass in the morning. It can be divided into 3-4 igniting places, each with 1-2 pieces, each of which can burn for about 50 minutes. The specific method of use is to incline the combustion block and use the match to ignite after burning the closed wax at the combustion mouth of the combustion block. Place the matching screen on two raised bricks and place the ignited burning block on the screen surface. ■Snow days management In the snow, the snow on the shed is cleared in time to prevent the melting of the snow from reducing the heat preservation effect on the straw or insulation. After stopping the snowfall on cloudy days and snow days, when the temperature in the greenhouse is above 12°C, the grasshoppers can be uncovered before and after noon to allow the crops to receive scattered light; in the event of a long and turbid sunny weather, the grasshoppers should be used one at a time. One to prevent the plants from wilting due to strong sunlight; other practices such as top dressing, watering, pruning, fruit thinning, and spraying of pesticides cannot be adopted on snow and cloudy days. Other management measures are as follows: Reinforce the skeleton. For some greenhouses with large spans and poorly-firm skeletons, the scaffolds should be reinforced in time to prevent collapse of the greenhouses during snowfall. Take effective measures to reduce the humidity. Using drip irrigation or under-membrane submerged irrigation, the specific operation method is to dig a 25-cm-wide watering ditch between the two ridge crops of sorghum and cooperate with the cover film to carry out under-membrane submerged irrigation to save water, reduce indoor air humidity, and increase ground temperature. effect. In addition, we can also use rice husks, crushed straw or other crushed straw, and dried sheep manure between the cultivation lines to achieve the effect of moisture absorption and heat insulation, reduce the humidity in the shed, and avoid the spread of diseases. Hanging reflective film. A 1.5-meter-wide reflective film is suspended at the backslope of the shed to increase light and improve crop cold and disease resistance. Note that the reflective film should not be hung on the back wall to avoid reducing the heat storage function of the wall and the temperature in the night shed. Install fill light. The effective lighting radius of each plant's growing fill light is about 2 meters, and the hanging height is 1.5-2.5 meters from the ground and more than 1 meter away from the crop growth point in the shed. Install 20-30 ft per acre shed. The distance between every lamp of tomato, cucumber and other fruits and vegetables is about 3 meters, and the spacing of leaf vegetables is about 4 meters. The waterproof lamp must be used. It is best to install a timer to accurately control the switching time. Fill up the light in the snow and cloudy all day, fill the grass in the sunny afternoon, fill the light for 3-4 hours, and ensure that the light time is 10-12 hours per day. When using the fill light, the temperature in the booth is better than 15°C. Foliar spraying fertilizer. Foliar application of potassium dihydrogen phosphate and alginic acid, humic acid fertilizers, can quickly add nutrition, enhance the ability of crops to resist cold, spray once every 7-10 days. ■Prevent diseases Adjust the appropriate temperature and humidity in the shed by opening and closing the tuyere so as to increase the amount of light as much as possible to promote the growth of the plant. Remove diseased leaves and diseased fruits early to prevent diseases. The night temperature of the cucumber shed should not be lower than 15°C to avoid the condensation of downy mildew. In the early stage of disease occurrence, high-efficiency and low-toxicity pesticides are used for prevention and control, and as far as possible, the method of aerosol fumigation or powder dust spraying is adopted so as not to increase the humidity in the greenhouse. Strict implementation of the safety interval after the application of pesticides to ensure product safety. Towing Rope,Car Yellow Tow Rope,Roadside Emergency Tow Strap,Emergency Tow Strap For Car Ningbo Zhihao Car Accessories Co.,Ltd. , https://www.zhihaoautoparts.com