Optimum sowing date of winter wheat

Cold dew, the17th solar term among the 24 solar terms, usually falls on the 7th to 9th day of June +00 in the Gregorian calendar every year, mostly on the 8th day of June +00. At present, +00 on June 6th, 1 ~ 15 is the suitable sowing date for planting wheat in most winter wheat planting areas in China. So it's basically "cold dew planting wheat."

Don't miss the busy farming season! It's time to plant wheat again!

It may be that global warming has delayed the date of temperature drop, which makes the agricultural proverb in the middle and lower reaches of the Yellow River "White dew is early, cold dew is late, and the autumnal equinox is just then" more and more inaccurate, so it seems that it should be changed to "cold dew is just then".

How should all localities determine the suitable sowing date of winter wheat?

Cold dew, the17th solar term among the 24 solar terms, usually falls on the 7th to 9th of 10 in the Gregorian calendar every year, mostly on the 8th of 10.

At present, 65438+1October 1 ~ 15 is the suitable sowing date for planting wheat in most winter wheat planting areas in China. So it's basically "cold dew planting wheat."

What is the suitable sowing temperature for winter wheat?

As we all know, 15℃~20℃ is the most suitable temperature for wheat seed germination and seedling growth, while 16℃~20℃ is the most suitable temperature range for wheat root growth.

Too low or too high temperature will affect normal germination, especially below 2℃ and above 30℃ will seriously inhibit germination and root development.

Of course, different wheat varieties have different requirements for sowing temperature. Generally speaking, the suitable temperature requirements for winter varieties are air temperature 16℃~ 18℃ and 5cm ground temperature 17℃~ 19℃.

Semi-winter varieties are suitable for sowing at air temperature 14℃~ 16℃ and 5cm ground temperature 15℃~ 17℃. Spring varieties are suitable for sowing when the air temperature is 12℃~ 14℃ and the ground temperature is 5cm 13℃~ 15℃.

The suitable sowing temperature of winter wheat in most winter wheat areas is just in the middle and early days of June 5438+ 10, so it is more suitable to sow before and after the cold dew solar term.