For high-yield potato planting, it is necessary to prevent cold and frost in winter and spring!
The temperature in winter and spring is relatively low, which has a great impact on the growth of potato. If the cold-proof measures are improper, it is easy to cause frostbite of stems and leaves, and it is impossible to potato, resulting in reduced yield. Therefore, it is very important to make cold and anti-freeze of potatoes. So how do you do it? Let's take a look at it. Basic requirements for temperature of potatoes 1. The temperature suitable for the growth of potato shoots is about 18 °C. If the shoots are lower than 4 °C, the shoots can not elongate, and the shoots above 36 °C are not easy to germinate, and often cause a lot of decay. 2. The optimal growth temperature of potato stems and leaves is 17-21 ° C. When it is lower than 7 ° C or higher than 42 ° C, the stems and leaves will stop growing. If the average daily temperature is 25-27 °C, stem and leaf growth will be affected. 3, the optimum potato tuber growth temperature is 17-19 ° C, more than 21 ° C tuber is inhibited, below -2 ° C or higher than 29 ° C, the tuber will stop growing. Low temperature can increase the formation of tubers early, and high temperature can cause secondary growth of tubers to form small potatoes. 4, the optimum temperature for potato flowering is 15-17 ° C, the temperature is lower than 5 ° C or higher than 38 ° C, there will be no flowering phenomenon. It will be frozen at -0.5 °C and will die at -1 °C. Potato pre-disaster prevention measures 1. Choose varieties with strong cold resistance, sowing at the right time Potatoes avoid the key to preventing freezing damage during heavy frosting. You can choose to sow about 20 days before the final frost day, or it is better to sown at 7-8 °C when the soil temperature is lower at 10cm. 2, fertilization and antifreeze Before the arrival of frost or strong cold air, stop using nitrogen fertilizer, beware of the plant's softness and cold resistance. 1-2 days before the arrival of the freezing damage, the antifreeze or the composite biological fertilizer can be sprayed to reduce the freezing damage. 3, irrigation and frost protection Pay close attention to the weather changes, put water into the ditch 1-2 days before the frost arrives, keep the soil moist or have water at the bottom of the ditch. 4, water spray anti-frost At the time of the frost (before the morning to the sun), use water spray and frost-proofing such as nozzle belt, sprinkler ring or water vapor diffuser. 5, covering the cold Before frost or frost damage occurs, you can cover the seedlings with agricultural film, straw, color strips, straw curtains, mats, etc., or build a small arch shed to prevent frost and frost. Potato disaster relief measures 1, water defrosting After the frost occurs, before the sun comes out, promptly spray water or manually remove the ice on the leaf surface to reduce the damage of frost. 2, drainage and warming After the frost occurs, the field water is drained, the soil temperature is raised, and the freezing is reduced. 3, topdressing promotes long After the freezing damage, when the growth is resumed, urea 3 2 per acre, potassium dihydrogen Phosphate 4 2, brown sugar half a catty to water 100 kg spray, or spray cytokinin to promote the plant to resume growth. 4, pay attention to disease prevention Verticillium wilt and blight are prone to occur after cryopreservation. You can use carbendazim plus nail cream and carbaryl to prevent verticillium wilt. You can use bacteriocin or thiabend copper to prevent bacterial wilt, or use Dasheng or metalaxyl to prevent late blight. The above is the main point of measures for potato planting to prevent freezing damage. After reading it, what else do you have to add? For the wonderful pictures and hot comments about potato freeze damage, you may be interested in the following recommended content, welcome to read. Zinc Acetate Dihydrate,Zine Acetate,Zinc Diacetate Dihydrate,Zinc Acetic Dihydrate Wuxi Yangshan Biochemical Co.,Ltd. , https://www.salesacetates.com
