Key points of no-tillage sowing technology of wheat

Wheat no-tillage sowing is an important link in conservation tillage, and the sowing quality directly affects the benefits produced by conservation technology. In order to improve the no-tillage sowing quality of wheat, we should pay attention to the following problems:

1. The surface cover should be uniform. Try to return the corn straw to the field mechanically when the corn straw is upright, once. On the other hand, returning the field after artificial cutting will make the surface cover uneven, which is easy to cause blockage in the operation of the planter.

two。 Choose a good variety. The row spacing of no-tillage sowing wheat is 26 times, which is larger than that of conventional sowing and the number of plants per mu is less. Therefore, when selecting wheat varieties, we should choose high-quality varieties with drought resistance and strong tillering ability. Experts recommend: Lumai 21, Yannong 19. Carry out the necessary uniform mixing or coating treatment before sowing.

3. Sow seeds with enough moisture. Try to avoid irrigation after sowing, so as not to cause thickening of the covered soil and low surface temperature, resulting in weak wheat seedlings and affecting pre-winter tillering, so that the wheat population before winter is insufficient and the strong seedlings can not survive the winter.

4. Apply sufficient base fertilizer. Try to apply enough granular compound and compound bottom fertilizer at one time. 25-35 kilograms per mu is fine. If the phenomenon of yellow seedlings occurs in the field, nitrogen fertilizer can be added with irrigation. Do not reduce the amount of chemical fertilizer in the first year, and then gradually reduce the application rate according to the content of soil organic matter and available nutrients.

5. Sowing in the right amount at the right time. In the case of good soil moisture, winter wheat should be sowed at the right time; in the case of poor soil moisture, it can be sown 3-5 days early and increase the sowing rate by 1.5-2 kg / mu.

6. Control the depth of sowing. Under the condition that the soil moisture is good and can ensure the emergence of seedlings, it should be shallow rather than deep. It can be kept between 1.5 and 4 inches according to soil moisture. If sowing is too deep, first, the emergence of seedlings is late and the tillering ability of wheat is poor. Second, it is not conducive to the dispersion of wheat in the process of entering the soil, which makes the seedling belt too narrow. According to the field measurement last year, when the sowing depth was between 1.5 and 3 years, the tillers were 4-7 plants and the seedling bandwidth was 11-16 years. When the sowing depth is less than 4 times, the tillers of wheat are 3-5 plants, and the seedling bandwidth is 7-11 times.

7. Frozen water brings fat. Where there are irrigation conditions, in order to prevent early return to green due to de-fertilization, it is very helpful to adopt frozen water with fertilizer irrigation in years with poor soil moisture, which is very helpful for plots with insufficient populations before winter. Yin Shuhong