The phenological period of fruit trees is different, and their frost resistance is also different. The critical temperature of short-term hypothermia in different organs of common fruit trees is: -3.9-1.1°C in bud stage, -2.2-0.6°C in flowering stage, and -0.6-0°C in young fruit stage. The main anti-frost measures in orchards are as follows: (1) In spring, water is poured before the frost comes, and water is used to adjust the temperature and reduce the impact of frost damage.
(2) Orchard smoke and frost protection can reduce the loss of ground heat.
(3) The use of heaters in orchards in a conditional area can effectively increase the temperature in the park.
(4) For the fruit trees that are prone to frost, it is necessary to strengthen the management of water and fertilizer in the field and improve the antifreeze ability; for frozen fruit trees, artificial pollination and external spraying of fertilizers shall be adopted to restore the tree vigor as soon as possible.
Thoracoscopic knot Pushing Stick
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