What is the suitable temperature for wheat sowing? What should I pay attention to?

Wheat is a low-temperature tolerant crop, and the temperature required for seed germination is relatively low. If autumn wheat is sown too late, the seeds will overwinter in the soil. The seeds that have germinated can also survive the cold winter smoothly. . Spring wheat is sown after the soil thaws and germinates slowly at low temperatures, but is not tolerant of high temperatures. The temperature conditions for wheat seed germination include the following three aspects:

1. The minimum temperature for wheat seed germination is 1 to 2°C, and the germination speed increases starting from 5°C. If the temperature during the germination period is too low, the germination speed is extremely slow, making it easy to be infected with soil-borne diseases and causing seed rot.

2. The most suitable germination temperature for wheat seeds is 15-20℃. Within this temperature range, wheat seeds germinate the fastest, have the highest germination rate, and are not prone to leggy seedlings.

3. The maximum temperature for wheat seeds to germinate is 30 to 35°C. If it exceeds 37°C, almost no germination will occur.

Moisture and oxygen conditions required for wheat seed germination

Wheat seed germination requires not only specific temperature conditions, but also a certain amount of humidity and oxygen. Generally speaking, wheat seeds only need to absorb the normal moisture of their own weight to germinate, so there is a saying that "wheat produces yellow moisture". If the moisture in the 3-5 cm soil layer is insufficient, you need to create moisture for sowing, or sow seeds. Water later, but it is not advisable to flood with water, which will cause soil compaction and affect seedling emergence.

Wheat seeds also need sufficient oxygen to germinate. After continuous rainy weather after sowing, the seeds will absorb enough water but lack oxygen, which will also cause suffocation. Shangluo City calls it "slurry bag", and finally has to Replant wheat.

What is the suitable sowing temperature for wheat?

Under normal circumstances, wheat is sown when the daily average temperature is 16-18℃, and the ground temperature during this period is 14-16℃. The sowing period also needs to refer to the difference between spring wheat seeds and winter wheat seeds. Wheat seeds with strong winter characteristics require more accumulated temperature before winter and can be sown in advance, while spring wheat seeds are sown later. The suitable sowing period is that the wheat seedling emergence period is 7 days. If the seedlings emerge within 5 days, it means that the sowing period is early. If the sowing period exceeds 9 days, the sowing period is late.

The wheat sowing period is directly related to the strong seedlings of wheat before winter. Before the soil freezes, 6 to 7 leaves and 3 to 5 strong tillers will meet the standard of strong seedlings. The temperatures are different in autumn and winter every year, so the sowing period will also change. Some sowing periods are suitable, but the warm winter phenomenon will also cause leggy wheat seedlings to form before winter.

Wheat needs to determine the appropriate sowing period, and also needs to carry out reasonable seed treatment and soil treatment to prevent and control wheat rust, underground pests and other pests and diseases. It is also necessary to control the amount and type of fertilizer and control the sowing according to the moisture content. Depth etc. In wheat production, because wheat seeds require relatively little water, seed soaking and germination are generally rarely used. Unless the sowing period is late or continuous rain causes a lack of seedlings, germination and sowing will be considered.

In the process of making maltose, etc., it is necessary to control the temperature to ensure the progress of the entire process