The agricultural proverb "The white dew is early, the cold dew is late, and the wheat is sown at the right time in the autumn equinox". Are you getting used to it now?

Agricultural proverbs are proverbs about agricultural production and a summary of the long-term life and production practice of working people in China. The ancients created the "twenty-four solar terms" to guide agricultural production. There are also many proverbs around these 24 solar terms to arrange agricultural activities according to the schedule, such as "the white dew is early, the cold dew is late, and the autumn equinox is the time to plant wheat". However, China has a vast territory, and the situation in different places in the same season is very different. Therefore, local agricultural production should not be guided by regional agricultural proverbs, but should be arranged reasonably according to local actual conditions, supplemented by agricultural proverbs.

First of all, temperature is the main factor that determines the sowing date of winter wheat.

The agricultural proverb "The white dew is early, the cold dew is late, and the autumn equinox is the time to plant wheat" is also based on the temperature. Millennium (September 7 -8), autumnal equinox (September 22? 24), cold dew (101October 7? 9) These three solar terms are separated by half a month, and the temperature gradually decreases.

As we all know, the temperature in the past winter was much lower than now. Especially in recent years, with the climate warming, these ancient agricultural proverbs have to keep pace with the times and can't stick to the rules.

The second is the change of wheat varieties. We don't know what kind of wheat was sown in the past. At present, we have winter wheat varieties (suitable temperature 16? 18℃), semi-winter wheat varieties (suitable temperature is 14? 16℃) and so on. Because the required temperature is different, the sowing date is early or late.

Under normal circumstances, the average daily temperature 14? 18℃ is the best sowing date for winter wheat.

I wonder when is the suitable sowing date for winter wheat in your place? As far as Anqiu, Weifang, Shandong Province is concerned, the suitable sowing date of wheat is 65438+ 10 from October 3rd to 65438+ 10. However, this time period is around the cold dew solar terms, but it is not like the agricultural proverb that "cold dew is too late". We have an agricultural proverb here called "Don't use manure on cold dew wheat", which also means that it is not too late to plant cold dew wheat.

Second, facts speak for themselves.

I have a piece of land which is a typical waterlogged depression. In our words, "this is a land of waterlogged frogs." One autumn, it rained continuously, and the corn in the field was rotten. Other people's wheat was "small" and my land was still in rotation. I finally waited until it was almost ready, and it was several days before the first frost solar terms. Shall we sow wheat?

An old man said to me, "just sow, plant more seeds and apply more fertilizer." Why is there such a thing as "working hard"? Listen to the old man. Play it. Don't tell me. It's okay. Although the output is lower than others, it is not much different, and the yield per mu is more than 800 kilograms.

I have a friend whose land is planted with ginger, but the stinking ginger that year is almost worthless, and 25 cents a catty is not enough to pay for ginger. When he finally finished producing ginger, it was almost 10 days after the first frost. He planted wheat without using seed fertilizer, but the yield was good later. Because the ginger field is full of fat and water.

There are many examples to prove that the agricultural proverb "early dew and late cold dew, autumn equinox just planting wheat" is no longer suitable for today's wheat sowing. In my opinion, it should be "the autumnal equinox is early, the first frost is late, and the cold dew is sowing wheat at that time", which is roughly the case, and the next solar term is just behind.

There is also a peasant proverb that says, "You can't plant wheat in the first frost, and you can't bear wheat after the first frost." . It means that after the first first frost solar term, the weather will be hard to feel. Maybe one day, cold air will come, the ground temperature will drop, the wheat will not germinate, and there is even the possibility of rotten seeds. Even if the seedlings can be unearthed, they will suffer because they are thin and can't stand the frost, and they will wither without harvest and burden.

Therefore, it is best to sow winter wheat before the first frost. However, due to various reasons, wheat was sown late, so we can make up for the shortage caused by late sowing by increasing chemical fertilizer, selecting semi-winter, spring-biased or spring-oriented improved varieties, increasing sowing quantity and scientific management. This is the so-called four supplements and one liter method.

Well, that's all about the sowing date of winter wheat. Anyway, I don't think the agricultural proverb "early dew and late cold dew, planting wheat at the autumnal equinox is just the right time" is appropriate here. Today is the autumnal equinox, but the corn cobs here are even green. It takes 10 days to harvest corn, which is similar to sowing wheat in cold dew. As for my "waterlogged frog" land, because there is too much rain this year, corn is gone, and wheat may be planted around the first frost.