Cold damage period
Before April 20th of each year, it may be the time when the cold spring occurs. For kiwifruit, the bud sprouting leaves to the buds in the early stage is the most vulnerable to the cold weather hazard.
Basic knowledge
In the spring, the germination of kiwifruit leaves is in the bud stage. If the lower limit temperature is lower than 5 °C, the kiwi may suffer from cold damage. When the lower limit temperature is lower than 0 °C in spring, freezing damage will occur. This is a critical temperature that must be remembered for cold damage.
Master the law
When the critical temperature of the cold spring occurs, if the cloudy weather and rainfall occur at the same time, it will impact or ease the cold damage, but remember that when the critical temperature of cold damage occurs (or forecast), if it is sunny or windless, it is cold damage (freezing damage) It is most likely to aggravate the meteorological conditions that occur. Such meteorological conditions are alarms that must be engraved in the heart.
Proper measures
At present, the most effective, most feasible and quickest way to prevent and respond to the downfall is the orchard. Under the premise of safety, as long as a certain amount of smoke layer with a certain thickness is formed over the park, the fruit trees can be protected from the cold damage.
Be prepared
In areas where cold damage frequently occurs, prepare smoked materials such as sawn wood, hard firewood, waste engine oil, firewood, etc. in advance to prevent precautions.
Scientific fumigation
Smoke and smoke are cold, seemingly simple, but it is very complicated, requires a lot, and the details are very strict. The amount of smoked material per unit area, the location of the smoked material, the quality requirements of the smoked material, the method of igniting the smoked material, the ignition time of the smoked material, the time of smoking after the smoked material is ignited, the lowest temperature of the cold spring, the real-time monitoring time, etc. It has direct influence and relationship on fumigation and chilling, and must be strictly understood and mastered.
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