Sowing in narrow rows with equal row spacing: the row spacing is generally 16 cm, 20 cm, 23 cm, etc. The advantages of this method are that the nutrient area per plant is uniform, soil fertility and light can be fully utilized, and the plants grow healthily and orderly, which is suitable for the yield level below 350 kg per mu.
Wide-width drilling: the row spacing and sowing width are relatively wide, such as wide-width drilling, the sowing width is 7 cm and the row spacing is 20 ~ 23 cm. The advantages are: less broken ridges, wide sowing range, even distribution of seeds, improved nutritional status of single plant, good ventilation and light transmission, and suitable for wheat fields with an yield of more than 350 kg per mu.
Wide and narrow row drilling: the configuration methods adopted in various places include narrow row 20cm, wide row 30cm, narrow row 17cm, wide row 30cm, narrow row 17cm, wide row 33cm, etc. In high-yield fields, the yield is generally increased by 5% ~ 10% compared with equal row spacing. The reasons are as follows: first, the lighting and ventilation conditions between factories have been improved; Second, the group state is reasonable; Thirdly, the amplitude of leaf area is relatively stable.
Small hole close planting: The soil of wheat field in southwest China is sticky, and there are many autumn rains, so it is difficult to prepare soil and sow, so the small hole close planting method is adopted. There are about 450,000 nests per mu, the row spacing is 20 ~ 22 cm, the nest spacing is 10 ~ 12 cm, and the opening depth is 3 ~ 5 cm. Nitrogen and potassium fertilizer are usually mixed in human and animal manure water and then concentrated in the bird's nest. Calcium superphosphate, oil cake, etc. Mix and cover the seeds in fine compost, and the thickness of the covered seeds is about 2 cm. The tools used are small crowbars and hoes, and the simple seeder developed in recent years can also sow seeds in one ditch.