In the folk, we often hear such a proverb: "Winter snow is a treasure, spring snow is as cheap as grass". In the cold of winter, people begin to hope for a few heavy snowfalls, which will indicate a good harvest for the coming year. Recently, heavy snow has occurred in many places, which has had a great impact on people's lives, but it is a good thing for croppers.
1. Winter snow is a treasure: the meaning of heavy snow in winter.
Snow in winter is a characteristic of the climate at this time. For many crops, however, a cold winter means withering. However, there are also some crops that are not afraid of the cold and can survive the cold winter. For example, winter wheat and rape, which are common in the countryside. Seemingly weak seedlings can also survive at sub-zero temperatures.
In fact, if you are familiar with the growth characteristics of wheat and other crops, you will know that wheat crops are not frozen or bad, but can survive the cold winter through dormancy under certain conditions. In fact, snow is one of the conditions for whether wheat can survive the cold winter.
Especially in the northern regions, low temperatures and little rain in winter can lead to a decrease in soil moisture, which in turn causes the ground temperature to start to decrease as well. At this time, if the ground temperature is too low about 20 centimeters underground, it will lead to frozen soil. At this time, it will damage the seedlings and roots that are not deeply rooted because of freezing.
If it snows frequently after the winter, it will cause the soil to be more humid and avoid the continuous drop in ground temperature. In this way, the situation of frozen soil can be greatly reduced, and the root system is reduced by frostbite.
In addition to this effect, heavy snow can also add a lot of water to the soil, and because of the cold winter temperature, it can freeze the pests and insect eggs that are not deep in hiding. In the coming year, the impact of pests and diseases can be greatly reduced.
2. Spring snow is as cheap as grass: the harmfulness of spring snow.
Every time after the beginning of spring, the temperature gradually warms up. As the temperature rises, crops that have passed the cold winter begin to slowly enter the normal growth period as the temperature rises. At this time, because of the rapid growth, the cold resistance of the crop is greatly reduced.
If there is a sudden spring snow at this time, it will inevitably cause frost damage to crops, which will affect the key growth periods such as growth, flowering, and pollination. The consequences of spring snow may be a reduction in production or even a complete harvest. It can be seen that for farmers, spring snow is very unwilling to be seen.
The spring snow mentioned here is the manifestation of the disastrous weather of "inverted spring cold" after the beginning of spring. In fact, many farmers know that there are very few cases where there is no "inverted spring cold" every year. This makes people have to prepare for the cold of spring every year. It doesn't always snow, but it's not uncommon for a steep drop to drop.
After the beginning of spring, many orchards in the northern region are about to enter the flowering period. In order to avoid the effects of the "cold spring" as much as possible, the growers will water the orchard to lower the ground temperature and make the trees longer dormant. This can help to delay flowering and avoid the adverse effects of steep cooling.
Summary:
In fact, through this agricultural proverb, you can see whether the weather is good or bad, depending on when it appears. The weather is good when people need it. If the farmer doesn't need it, then it's bad weather. For the effect of the inverted spring cold, it is estimated that no one will like it.