What are the measures for vegetables to prevent and cure cold in late spring? These three critical periods should not be missed!

Cold in late spring is a weather phenomenon in which the temperature in early spring is lower than that in the same period of the normal year, and crops often suffer frost damage as a result. This kind of weather "big change face" is very disadvantageous to the agricultural production, if the prevention is not timely, it is very easy to make the crops freeze. So what are the measures for vegetables to prevent and control the late spring cold? These three critical periods should not be missed!

Prevention and control measures of late spring cold with vegetables

The prevention and control of late spring cold by vegetables can be divided into three parts: the first is the damage in the seedling stage, the second is the damage in the adult stage, and the last is the damage in the flowering and fruiting stage. In the face of these three kinds of vegetables in different growing periods, we should have different prevention and control measures.

1. Victimization in seedling stage

Damage performance: when the cotyledon is injured, the edge of the cotyledon loses green, and it can grow normally when the temperature is restored; when the real leaf is injured, the edge of the leaf appears dark green, which will slowly dry up. When the growth point is damaged, the terminal bud will be frozen, and new leaves will not grow at this time, so that the slow seedling period of the plant will be greatly prolonged. If the weather gradually warms up and the damaged plant can not recover, it needs to be replenished at this time.

Countermeasures: to cultivate strong seedlings. It is best to be able to refine the seedlings at low temperature, which can effectively improve the frost resistance of vegetable seedlings, even if the late spring cold can minimize the effect of cold on the seedlings.

2. Victimization in the adult stage

Victimization performance: often show that the edge is dry, the plant becomes dispirited, the relatively young leaves lose green and turn yellow, and so on. Severe freezing will cause the growth point to dry up, and the plant root system will not grow new roots.

Countermeasures: the first thing to ensure is not the external conditions, but the plant itself, only robust vegetable plants in the late spring cold can reduce the loss, because robust plants will suffer much less damage. When cultivating plants, we should first do a good job of squatting seedlings of vegetable seedlings, then let the root system of vegetables get robust growth, and the third is to topdressing vegetables to ensure the nutrient demand in the middle stage of plant growth.

3. Victimization in flowering and fruiting period

Victimization performance: when vegetables are suddenly suffering from a cold spell or cooling when they blossom and bear fruit, it will reduce the pollen activity of the vegetable meeting, which will indirectly affect pollination, fertilization, etc., and will also lead to flower and fruit drop in the later stage. Flowering will also lead to poor differentiation of flower buds, which will directly lead to malformed fruits. Severely damaged melons and vegetables will also be topped by flowers.

Countermeasures: vegetables in the flowering stage are relatively delicate, as long as they are hurt, it is easy to fall flowers and fruits, even if the fruit will be deformed. Therefore, the good work to be done in this period is to carry out prevention in order to ensure the flowering and fruiting of vegetables. First of all, pay attention to the local weather in time, do not just look at these two days, be sure to look at a few more days, it is best to take a look at nearly half a month, so that you can better take preventive measures. When the temperature begins to change, do not water to avoid freezing damage, and prepare vegetables in time to survive the cold. Secondly, heat preservation should be carried out in time when the late spring cold is coming, so that the temperature of vegetables can be stable. There are many measures that can be taken, such as setting up some wind barriers and covering vegetables with plastic film. One of the more recommended small vegetables here is straw, which can not only keep out the cold but also be used as fertilizer.

The growing period of vegetables is different, so when the cold comes in late spring, the growing periods of vegetables are different. We should deal with them according to different growing periods and take the most effective measures.