What methods can be used to prevent freezing injury before the arrival of late spring cold?

First of all, let me share with you what is cold in spring? Late spring cold usually occurs in April, and the temperature is high and low. When the temperature is high, if crops bloom, if the temperature drops suddenly, it may affect pollination and flower development. If crops sprout and the temperature drops suddenly, the buds will turn black or fall off due to freezing injury. There have been many cold winters in Shandong this year, which have had a great impact on cherries, peach trees and kiwifruit.

So how to prevent colds in spring? 1, do a good job of fertilization in autumn, enhance crop nutrient storage and improve crop stress resistance.

Autumn fertilizer is also called "moon fertilizer". Autumn fertilization is an important fertilization period that determines flower bud differentiation and root growth in the coming year. Good autumn fertilization can enhance crop nutrient reserves and improve crops' own cold and drought resistance.

2. Check the weather forecast in time, master the temperature change and take preventive measures.

Late spring cold usually occurs in April, so people here in Shandong have formed the habit of watching the weather forecast every day in April, so we should grasp it in advance and act in advance;

3, water in advance, irrigation treatment

Reducing ground temperature, increasing specific heat and delaying the germination and flowering period of crops can avoid the influence of premature flowering and temperature on buds to some extent;

4, antifreeze treatment in advance

Spray brassinolide, cytokinin, plant protein, etc. Or some biostimulants (seaweed extract, amino oligosaccharide, chitin, chitosan, etc.). ) foliar fertilizer to increase the stress resistance and cold resistance of crops before late spring cold;

5, pay attention to the antifreeze period

Be sure to spray brassinolide before flowering to enhance the ability of frost resistance and stress resistance;

6. Smoke treatment

On the night before the arrival of late spring cold, light wet firewood and smoke in a low room to increase the temperature around the plot and reduce the influence of cold air.

To sum up, applying foliar fertilizer two days in advance has a certain anti-freezing effect. There are many kinds of foliar fertilizers. Only by choosing the right fertilizer can we prevent the cold in late spring, thus reducing the losses caused by the cold in late spring. I hope that the subject can do the above six measures, comprehensively prevent the cold in spring, minimize the harm, and achieve a bumper harvest of crops!