What does the sentence "March is afraid of Sanqi, April is afraid of the first day" mean? Why are farmers afraid of the first day of April?

As a rural person, Lao Zhang is very familiar with many rural planting proverbs. Today is the 30th day of the third lunar month, the day before the 1st day of the fourth lunar month. This is the critical period of agricultural production, because rape and wheat at home are in the middle and late stage of grain filling. It can be said that the weather at this time has a very obvious impact on the grain output in the next month. However, we didn't have a very advanced weather forecast in ancient times, so our ancients made a rough statistics based on the possible impact of some weather changes on subsequent grain production, and compiled the results of these statistics into some proverbs. Afraid of March 37 and April 1 day? This is the common saying we are going to say today.

March is afraid of Sanqi

According to our ancestors' understanding, three days in the third month of the lunar calendar are very important for subsequent production. These three days are March 7th, March17th and March 27th. Because our ancestors thought that if it rains in these three days in March, it means that there will be more rain this year and the next month, and March and April in the lunar calendar are important filling periods for wheat, rape and other food crops. At this time, the demand for sunlight is particularly great, because only enough sunlight can meet the accumulation of starch in crops, and if there is more rain, crops are prone to diseases, such as scab, which has a great impact on crop yield.

But why does this mean that if it rains in March these days, it will rain more next month? Perhaps many friends don't quite understand it, because many of our ancient folk proverbs are aimed at the Central Plains. After all, the Central Plains used to be the gathering place of the whole culture, which was more representative than the whole coastal area. Most of our central plains are in Hebei and Henan, and the climate in this area is influenced by cold air and hot air. The cold air in our Central Plains mainly comes from Siberia, while the hot air comes from the humid and warm air in the Pacific Ocean. We know that hot air usually carries a lot of water. When it meets cold air, the water vapor in the hot air will condense into raindrops, thus forming rain. The three days in March are the last three days of morning, noon and evening. In these days, if the weather is rainy or cold, the weather in recent days is likely to be like this. Generally speaking, March is a month with frequent cold in late spring. At this time, if there is too much rain these days, it means that the cold air in Siberia is relatively strong this year, so the subsequent cold air will slowly shrink, so this year there will be more rain and lower temperature, and the crop yield will not be too high.

April is afraid of the first day of junior high school.

In fact, April is not the first day of fear. I believe anyone who knows the rural calendar knows that there is an important solar term around the first day of April every year, and this solar term is Long Summer. The arrival of long summer represents the coming of summer. It can be said that there will be no late spring chill after the long summer, so farmers, don't worry about late spring chill after April. However, after April, crops will grow very fast, wheat will be harvested soon, and then corn and rice will be sown. In this case, if the long summer is still cold and rainy, it means that the cold air is particularly strong this year, and the whole northern region may be dry and rainy, because it is difficult for the hot ocean air to repel the cold air in the north quickly. Therefore, if the long summer weather is particularly good, it means that there will be more rain and favorable weather in the north this year.