Beware of freezing injury of kiwifruit in spring

In recent years, the phenomenon of "cold in late spring" is very prominent. Spring freezing injury is one of the disastrous weather that causes less germination, poor pollination, low fruit setting rate, delayed growth period, high yield and setback of income of kiwifruit. Prevention of kiwifruit freezing injury in spring is an important link in kiwifruit spring management. Recently, the reporter went to Louguan Town, Zhouzhi County, Shaanxi Province for an interview. Cao Yaobin, chairman of Zhouzhi Kiwifruit Branch of Shaanxi Province Fruit Industry Association, told the reporter that before April 20 of the solar calendar every spring, that is, before the grain rain, it is the frequent period of kiwifruit spring freeze damage. Kiwifruit gardens are located in tuyere zones or low-lying zones. The possibility of "late spring cold" in the spring of the next year is quite high. Fruit growers should pay close attention to local weather forecasts at any time and take necessary and effective preventive measures and methods in due time. There can be no fluke mentality. So, what are the clever measures to prevent kiwifruit from freezing in spring? Director Cao told reporters, First, Should be based on the weather forecast at that time, Timely crown spray water, Can delay bud germination 5-7 days, If can spray diluted fine rare earth fertilizer solution, Can improve the stress resistance ability of macaque Taiwan, Can play cold resistance, Freeze resistance, Flower protection fruit, Improve flowering pollination rate role. Second, spraying 3%-5% salt solution on kiwifruit shoots before spring freezing injury can effectively reduce freezing point and alleviate freezing injury. Thirdly, spraying antifreeze products before or after freezing injury can prevent freezing injury, repair cell membrane, restore cell activity and reduce pathogen invasion. Fourth, irrigation before freezing, irrigation time must be carried out before cooling, irrigation after timely drainage, irrigation, such as combined with human excrement, the effect is better. Fifth, with smoke warming, insulation antifreeze, in the orchard prepared chaff, sawdust, firewood and other flammable smoke, every 10 meters a pile, in the cold before the arrival of the night after 10 o 'clock, ignite flammable. Sixth, the tree tray cover, winter in the tree tray around with wheat straw, rice, corn stalks and other cover 10-20 cm, can improve the soil temperature. Seventh, the tree body wrap, before the arrival of the big freeze, with straw wrapped tree trunk, main branch, can effectively prevent cold invasion. In the spring of next year, straw is taken and burned intensively, which can prevent freezing and eliminate winter pests.