Now entering the early winter, many places have continued to cool down, especially when it rains, the temperature is very low, and even some areas have rain and snow. Although it is not the coldest time, Xiaobian reminds the majority of growers that they must do antifreeze measures. The following reminds everyone to popularize anti-freezing knowledge.
Anti-freezing points of greenhouse vegetables
If the vegetables have been frozen and caused frostbite, then the loss is difficult to avoid, so in order to minimize losses, growers must be prepared to prevent them in advance. When the crop is generally subjected to freezing damage, it is in a sub-health state. If it encounters low temperature, it is very likely to cause cell wall and cell membrane rupture. Therefore, we are supplemented with vegetable nutrition, which can make crops robust, better able to withstand frost damage, and also facilitate rapid recovery after freezing.
This point is said to be like a human being. A healthy person's virus is not easy to invade. If the body is weak, the temperature will only change slightly. They are not a cold or a fever. In the final analysis, it is because the body is not working. Vegetables are also true.
Greenhouse vegetable antifreeze program
1, improve lighting conditions
Improve the structure of the greenhouse: If there are conditions, it is best to use a galvanized steel pipe greenhouse. It is best to use a shed film for the shed film in the greenhouse. If it is a common film, it is better to use a polyethylene film. First of all, we can whiten the building materials and walls, which can increase the reflected light and extend the service life. We can increase the height of the greenhouse appropriately, and it can also improve the lighting conditions in the shed.
2, reasonable mix planting
When planting different varieties of vegetables in greenhouses, it is necessary to be high in the north and low in the south. When sowing, the seeds should be oriented in the same direction, and the cotyledons should be arranged in parallel when transplanting, and the cultivation specifications should be strictly enforced.
3, keep the film clean
Always clean and wash the water droplets and dust on the shed film, and remove the snow in time after snowing to increase the transparency and the amount of light. In addition, under the premise of not significantly affecting the temperature inside the shed, the warm materials such as grass rafts covered on the outside of the greenhouse should be properly covered and covered to ensure the lighting area.
4, artificial fill light
In the deep winter season or the plastic greenhouse with insufficient sunlight, it is especially important to carry out artificial light supplementation. However, due to the high cost, it is difficult to promote it in large areas, but it can be used as an emergency measure to improve the lighting conditions in the shed.
5, timely dehumidification
The humidity in the solar greenhouse is often greater than that of the open field and in a humid state. Therefore, the most important management of the air humidity in the solar greenhouse is dehumidification. The dehumidification measures on the production are summarized here: ventilation, reasonable watering , film cover, temperature rise and humidity, strengthen greenhouse warming and insulation measures.
In the early stage of vegetable growth, that is, the initial flower and the initial fruit period, the daytime temperature is controlled at about 23 °C, and the temperature gauge should not be hung under the tuyere, and should be hung in the middle to see the average temperature. The temperature required for the fruiting period is 28-30 ° C. This temperature refers to the temperature of the expanded fruit, so the temperature gauge is generally hung at the position of the first ear, about 30 cm above the surface.
If it is lower than 10 °C, it is not conducive to the growth of vegetables, and it is necessary to take timely insulation measures. Specifically, the following measures can be taken: improving the thermal insulation of the straw curtain, increasing the heat preservation of the rear wall, excavating the cold ditch outside the shed, digging the ditch in the shed, setting up temporary heating measures, hanging the reflective curtain in the greenhouse, and timely adding phosphorus Potassium.
To ensure that crops are healthy and not too long, it is essential to supplement phosphorus and potassium in crops. Therefore, in the winter, we can use potassium dihydrogen phosphate to the crops in an appropriate amount, which can prevent the wintering of the crops and the freezing damage of the plant's tender and weak buds. Winter temperatures are very low, and crops absorb nutrients slowly, so proper adjustment of crops is also very important, especially after recovery from freezing. This small series recommends paeoni.
Potassium dihydrogen phosphate and brassinolide are perfect match
This product is now eliminated by many manufacturers and distributors, but in fact it is a good price-effective antifreeze package. Brassinolide can regulate the endogenous hormone balance of the crop itself, enhance the resistance of crops, and achieve the effects of cold resistance, drought resistance, mites and disease resistance. It can also alleviate the damage of plants and help the crops recover quickly.
The above is about the introduction of crop antifreeze. In order to ensure your own interests, antifreeze must be done well in advance. The hazards caused by freezing damage in these years are also very common, so it is necessary for the growers to plan ahead, but don’t wait until after the occurrence to blame themselves. Do a good job of anti-freezing measures, and it will be late.
ZHOUSHAN SINOMEGA BIOTECH ENGINEERING CO.,LTD , https://www.sinomegabiotech.com