Icing hangs on branches and fruit trees

In the face of the harm caused by the uncontrollable “cold winter” to some fruit trees and wheat each year, experts and scholars Ren Zhi met each other recently and proposed ways to prevent “cold spring”.

Every spring, the “cold spring” is a big “killer” for fruit trees and wheat production. How can we take effective measures to minimize the losses caused by natural disasters? Several experts and professors gave advice to peasant friends.

"Cooling the cold" almost every year

Han Wei, director of the Yangling Meteorological Observatory in Shaanxi, said that the spring is a transitional period from winter to summer. Cyclone activity is particularly frequent and the weather is also very variable. Sometimes the temperature at midday plummets below 10 degrees Celsius, and it may even rain and snow. Sometimes it lasts as long as 10 days and a half month, which is what people say is "cold." Hanwei Province analyzed that the warm winter phenomenon has a relatively frequent “cold winter” chance. Last autumn and winter rainfall was basically the same as in previous years, and the temperature is normally low. He believes that it is unlikely that there will be a large area and long “cold winter” phenomenon. . However, he also said that if there is a long period of rainfall, the weather suddenly turns clear and the temperature will definitely drop sharply. Such a small-scale “cold spring” phenomenon will happen almost every year.

How do fruit trees prevent the “cold spring”? After years of practical observation, Professor Li Longshan, a professor at the Northwest Agriculture and Forestry University and an expert on fruit trees, concluded that the “cold spring” hurts all fruit trees, especially apricots, cherries, apples, and pears. Kiwifruit and other early flowering trees suffered the most significant damage. He proposed the prevention method is: conditional winter irrigation and spring irrigation, winter irrigation can maintain the ground temperature to avoid frostbite; the spring irrigation can reduce the temperature, can delay budding and flowering time. The next step is to dry the skin and apply amino acids to the tree trunk. This will increase the nutrition of the tree and enhance the cold resistance of the tree. Together with the pesticide Jinilushi, which is diluted to 4,000 times, it will kill overwintering pests lurking on the trunk. Can also be used lime, lime sulfur, salt, vegetable oil smear the trunk, the ratio is 5:1:0.5:0.5. The purpose of adding salt and vegetable oil is to prevent cracks from falling off, and lime sulfur can both prevent freezing and prevent insects. In addition, Professor Li believes that the traditional method of preventing smoke and frost is also effective. The specific approach is: When the temperature drops below zero, the top of the orchard will be littered with firewood, requiring firewood not too dry, otherwise the effect of less smoke is not ideal . Professor Li suggested that it is best that all orchards can act in unison so that the effect will be the best.

Wheat encounters "cold winter" how to remedy

Zhang Rui, a researcher at the Wheat Research Institute of the Northwest A&F University, recently saw a survey tour throughout Shaanxi. Last year, due to the late sowing date of wheat, the wheat population was generally smaller than in previous years. According to the analysis of the situation of the seedlings, this year's “cold spring” caused damage. The possibility is not great, however, individual sowing is too early, and the field where the seedlings are too busy does not rule out the possibility of a “cold spring” attack. Zhang researcher said that the wheat suffered a "cold spring" attack, the remedy is to carry out winter irrigation, add water; timely fertilizer, supplementary nutrients, do a good job of cultivator, raise the temperature, let it recover as soon as possible. Zhang researcher reminds us that wheat can be taken remedial measures in the early stage of “cold winter”. If the time is too late, the remedial effect will be very limited.

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