When is wheat sow?
Winter wheat: planted in September and October, harvested in April and May of the following year (mainly south of the Great Wall)
Spring wheat: sowing after the Spring Festival, harvested in August and September (mainly north of the Great Wall)
The winter wheat area in North China is the main winter wheat area in China. The planting area accounts for 47% of China's total area, and the total output accounts for 53% of China's total. In winter, the winter wheat can be safely wintered, and the accumulated temperature is greater than 0 °C and 4100 °C. It can be used for both wheat and early-maturing corn. Water is the limiting factor in determining the area planted. There are many kinds of irrigated land in the north of the Yellow River, and the Huanghuai Plain is a suitable area for dryland wheat with great production potential.
In the winter wheat area in the middle and lower reaches of the Yangtze River, the planting area accounts for 12.3% and the total output accounts for 45%. From January to May, the light and warm water in the Jianghuai Plain is more coordinated. Areas with precipitation greater than 450 mm in March-May are not suitable for growing wheat areas. The wheat commodity rate in this area is high.
In the spring wheat area of ​​Northeast China, the temperature in Heilongjiang and Jilin is low, and spring wheat is suitable.
Northwest spring and winter wheat area, irrigation area and Loess Plateau area. In addition to southern Xinjiang, it is mainly spring wheat, winter wheat in southern Xinjiang, with good adaptability, high productivity and excellent quality.
Southwestern wheat area, Sichuan Basin, Yunnan-Guizhou Plateau. Sichuan is warm in winter, warm water is suitable, but the light is small, and the pests are serious. The light intensity on the plateau is low, and the temperature during the mature period of irrigation is low, which is conducive to high yield.
In the winter and spring wheat areas of the Qinghai-Tibet Plateau, light and warm water are beneficial to wheat growth and heading-mature period of 50-80 days. Insufficient precipitation, wheat is planted on irrigated land.
The wheat sowing time in the North China Plain is generally in early October, and the growth period is about 230 days. The wheat in the whole region matures from late May to early June.
Wheat in the northeastern region is sown in mid-April. Wheat is sensitive to light and has a short growth period of about 90 days. Mature around July 20.
In addition, the wheat planting period in the middle and lower reaches of the Yangtze River is from mid-to-late October to mid-November, with a growth period of about 200 days and maturity in late May of the following year.
Wheat seeding method
The main methods of wheat planting are: striping, spreading, and seeding.
The seeds are evenly distributed, the soil cover is uniform, and the emergence is neat. The middle and late groups have better ventilation and light transmission, which is convenient for mechanized management. It is suitable for high yield and good for improving the work efficiency. Under high-yield cultivation conditions, the row spacing should be appropriately widened. It is planted in ventilation and light transmission to alleviate the contradiction between individuals and groups.
Spreading is mostly used in wheat-cotton intercropping or rice-wheat rotation. The soil is sticky and the soil is difficult to spread when it is difficult to harvest. It is conducive to grabbing time, stealing and saving labor. The individual distribution of seedlings and the nutrient area of ​​individual plants are better, but the seeds are inconsistent. . When the soil is poor, the depth, dew, and plexus are more, the seedling rate is low, the wheat seedlings are poorly uniform, and the ventilation and light transmission are poor in the middle and late stages, and the field management is inconvenient.
The hole sowing is also called on-demand or nesting. It is used in the rice field and the lack of fertilizer or mixed cropping area. The fertilization is concentrated, the seeding is uniform, the emergence is neat, the field management is convenient, but the flowering is more, the hole spacing is larger, and the number of seedlings is Less, affecting the increase in output.
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