The dormancy of fruit trees in autumn and winter is an important feature of deciduous fruit trees and a developmental stage in the fruit tree's annual growth cycle. In order to adapt to the low temperature, the fruit trees will enter dormancy during autumn and winter.
Facilities for growing fruit trees must break the natural dormancy of fruit trees during the winter cold period. The facilities will cultivate fruit trees. If the cold temperature required for winter is not met, the fruit trees will sprout late, the buds will fall off, and the growth and development will be poor. Under natural conditions, fruit trees must go through a certain low temperature in order to complete the internal transformation of the tree body and lift the dormancy of the buds. Therefore, the cultivation of fruit trees must be managed to break the winter sleep of fruit trees.
Temperature is one of the major climatic factors that affect the dormancy of fruit trees. There are two ways to break the dormancy of fruit trees. One is the chemical method and the other is the physical method. Here are some physical methods for breaking the dormancy of fruit trees as follows:
First, create the low-temperature environment needed to break the dormancy. Some studies have found that 0 to 7.2 °C low temperature as soon as possible to break the dormant effective low temperature, the temperature is higher than the effective low temperature (0 ~ 7.2 °C), have a negative effect, below the effective low temperature, you can not break the dormancy of fruit trees. The methods for creating an effective low temperature environment include: 1. Ice cube cooling. Use ice cubes to lower the temperature inside the facility so that the fruit trees will go through the dormancy as soon as possible. 2. The use of short-distance temperature difference climate. In the fall, fruit trees (such as peach trees) planted in containers are transported to high altitude mountains for 40 days. In low altitude areas, it can also be placed below 4°C for 15 to 20 days.
Second, high temperature processing. Suitable for grapes, soaking the grape branches in warm water of 45°C for 4 hours will help break the dormancy of buds.
Third, intermittent water spray. After the peach tree begins to sleep, spray the water every 40 to 50 minutes every day at night temperatures below 12°C.
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