When is the best sowing time for wheat? What's the temperature? How much is it?

The suitable sowing temperature for winter wheat varieties is 16-18 ℃, about September 27 to October 5, and that for semi-winter wheat varieties is 16-17 ℃. From September 27 to October 12, the suitable temperature for spring varieties is 16-15 ℃, and the suitable sowing rate is 18-30 jin / mu in dry stubble wheat field and 35-50 jin / mu in rice stubble wheat field.

I. the best sowing date for wheat

1. The suitable sowing temperature of winter wheat is 16-18 ℃, which is about September 27 to October 5, and that of semi-winter wheat is 16-17 ℃. From September 27 to October 12, the suitable temperature for spring varieties is 16-15 ℃, about October 10-15.

2. Due to the popularization and application of semi-winter varieties, the improvement of soil and fertilizer conditions and the strict control of pre-winter population, the sowing date is later than traditional. "White Dew is earlier, Cold Dew is later, the Autumn Equinox is just at that time" is only suitable for shady sloping land in mountainous areas. as well as some saline-alkali land and northwest Shandong wheat area.

3. In general, the sowing amount of wheat should be determined according to the characteristics of varieties, the time of sowing, the quality of soil, the level of soil fertility and so on. The sowing time is early, the amount of sowing is less, and vice versa. The amount of planting of varieties with strong tillering ability is less and that of weak tillering ability is large. However, the amount of seed used for heavy soil quality and poor soil fertility is 18-30 jin / mu in dry stubble wheat field and 35-50 jin / mu in rice stubble wheat field.

4. generally planted in the land with deep soil layer, good structure and deep plough layer, it is beneficial to store water and preserve fertilizer and promote the development of wheat root system. Soil structure refers to solid, that is, organic and non-organic body, as well as the composition proportion of liquid and gas. it has a close relationship with soil moisture, air, temperature and nutrients, such as poor structure of sand and heavy clay, it is difficult to form high yield.

5. Wheat is a long-day crop, which needs 8-12 hours of light every day. If the sunshine condition is not enough, it can not go through the light stage and can not go through the heading and fruiting stage. The wheat light stage is generally after the vernalization stage.

Second, the distribution range of wheat

1. The North China region is Tianjin, Beijing, Hebei, Henan and Shanxi; the East China region is the central part of Shandong, Jiangsu and Anhui provinces; the Central China region is Jiangxi and Hubei; the Northwest region is Gansu, Shaanxi, Qinghai, Ningxia and Xinjiang; the northeast region is Liaoning, Jilin and Heilongjiang; the southwest region is Chongqing, Sichuan and Guizhou; and the northern region is Inner Mongolia and Xinjiang.

2. Wheat is a gramineous plant and a cereal crop widely planted all over the world. The caryopsis of wheat is one of the staple foods of human beings. Generally, it can be ground into flour to make bread, biscuits, steamed bread, noodles and other foods. After fermentation, it can be made into beer, liquor (such as vodka), alcohol, or biomass fuel. Lianghe Valley is the region where wheat was cultivated earlier in the world, and China is one of the countries that planted wheat earlier in the world.