"Chilling the cold" refers to an unexpected cold spell that occurred in March and April, which poses a serious threat to fruit trees such as apricots, plums, and cherries. These trees are particularly sensitive to "cold spring" conditions, which can damage or even destroy blossoms. To protect their crops, farmers can implement several effective measures: Spraying lime water is one of the most common techniques. Applying 1% lime water 25 to 30 days before flowering can delay blooming by 3 to 5 days. However, this method should be used carefully, as a sudden drop in temperature just 1 to 2 days after application may still cause damage. Another strategy is irrigation. Farmers should monitor weather forecasts closely and water their orchards before a cold front arrives. This helps lower soil temperature, slows tree growth, and delays flowering by about 2 to 3 days, giving the trees more time to withstand the cold. In addition, using smoke for frost protection is a traditional but effective method. On the night when a cold snap begins, farmers light small fires around the orchard. The resulting smoke creates a protective layer over the trees, helping to trap heat and prevent frost damage. This practice should continue until sunrise. For fruit trees that have already been damaged by frost, there are steps that can help reduce losses. One key measure is artificial pollination. If some flowers remain open and unfrozen, pollen can be collected from the refrigerator and used to manually pollinate them, increasing the chances of fruit set. Fertilizer and water management should also be intensified, especially in low-lying areas where frost damage tends to be more severe. Quick-release nitrogen fertilizers and timely watering can help stimulate recovery and support the growth of remaining healthy flowers and fruits. Finally, applying foliar fertilizer after a frost event is highly recommended. Frost-damaged leaves may not function properly, so spraying nutrients directly onto the foliage helps boost photosynthesis and provides essential energy for the tree’s recovery and future growth. By combining these methods, farmers can better protect their orchards and minimize the impact of unpredictable spring frosts.

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