How should fruit trees distinguish between natural dormancy and forced sleep
Every year when entering the winter season, the leaves of the fruit trees will basically fall, and there is no trace of growth from the outer layer phenomenon, so people call this phenomenon of fruit trees a dormant period. From the appearance, the life activities of the tree in the dormant period are gradually weakened, but the physiological and biochemical activities in the tree are still continuing. A large amount of starch in the body is converted into sugar with the decrease of temperature, and the nutrient content of the cell liquid increases. The ability to cool is enhanced.
First, the natural dormancy of fruit trees
Natural dormancy refers to a dormant state in which germination growth can be initiated after a certain low temperature condition is required to achieve germination growth even if a suitable growth environment condition is given. The deciduous dormancy of deciduous fruit trees in winter is a typical natural dormancy.
Understanding natural dormancy is very important for the cultivation of fruit trees. If you do not understand the characteristics of natural dormancy, for the morning market, premature warming of the fruit trees cultivated in the facility will lead to serious consequences such as weak tree, early flowering and irregularity, and poor fruit setting rate.
Natural dormancy generally refers to the cumulative number of hours from 0 °C to 7.2 °C. In the case of 0 ° C - 7.2 ° C, apples and pears need 1200-1500 hours, apricots, plums, peaches need 600-1100 hours, grapes, walnuts, dates need 1000-2100 hours. Therefore, fruit growers engaged in facility cultivation must wait until the crop reaches a cumulative low temperature before it can heat up.
Second, the forced destruction of fruit trees
Forced dormancy means that after natural dormancy, often due to adverse environmental conditions, such as low temperature, lack of water, etc., the fruit trees can not germinate, and the fruit trees are forced to sleep, called forced sleep. During forced dormancy, if the temperature is warmed up and then turned cold, the tree is susceptible to freezing damage.
In the northern region, the time period below 7.2 degrees is longer than the natural dormancy time of the fruit trees. After the natural dormancy period, there is a period of forced dormancy. Therefore, the trunk is often whitened and sprayed in early spring. Water irrigation, spray growth retardant and other measures force the fruit trees to continue to sleep, avoiding early spring frost.
I believe that after reading it, you will have a certain understanding of the natural dormancy and forced dormancy of the fruit trees. It is very important to distinguish the two dormancy of the fruit trees, because only correct separation can come to take correct agricultural measures to ensure Fruit trees are strong and growing in the coming year.
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