How to plant sunflower seeds

Before sowing sunflowers, select the land suitable for planting, then soak the selected seeds in warm water, and sow the seeds after germination. The sowing time is determined according to the growth period of the variety, mainly in spring or summer, and the way of sowing can choose artificial or mechanical bed, on-demand sowing or ditch sowing.

After sowing sunflower seeds, we should pay attention to field management:

1. Check the fields to replenish seedlings

Sunflower is a dicotyledonous crop, it is difficult to grow seedlings on the top soil, coupled with soil preparation, sowing quality is not high, or rain topsoil hardening after sowing, or diseases, insects, rats, finches and other damage, are easy to cause lack of seedlings and broken ridges. In order to ensure the whole seedling sowing, the field must be checked line by line during the seedling emergence period; if the seedlings are missing in a row, they should be replanted in time, and the seeds should be soaked to promote budding and whitening. Lack of seedlings should be dense and sparse, transplant with soil (pay attention to the sunny orientation of the seedlings), pour good root water, the survival rate can generally reach more than 95%.

two。 Inter-seedling fixed seedling

It is necessary to interplant seedlings as early as possible to prevent seedlings from squeezing, affecting the cultivation of strong seedlings, and even the yield in the future. According to the experiment: 1 pair of true leaves and early seedlings, 2-3 pairs of true leaf seedlings have 1200-1500 florets in each disk, which is higher than that of 3 pairs of true leaves, and the yield is 19% higher. To

3. Intermediate ploughing and weeding

During the whole growth period, 2Mel was ploughed for 3 times. The first intertillage was carried out in 1 Mel and 2 pairs of true leaves, the second intertillage was carried out one week after seedling setting, and the third intertillage was completed before ridge sealing.

4. Trench and manure

In the third intertillage, ditching and topdressing is needed, mainly nitrogen and phosphorus fertilizer. Every 667 square meters of diammonium phosphate 5 kg, urea 10 kg, mix evenly and apply to the soil. Through trenching to cultivate soil, we can ensure the growth and development of secondary roots, prevent lodging and reduce the basal branches below the cotyledon nodes.

5. Irrigation

Using furrow irrigation to reduce the amount of irrigation each time can effectively prevent lodging. Proper irrigation should be carried out in the bud, 4-5 days before flowering and during the filling period.

In addition, during the management period, we should also pay attention to artificial pollination and drought prevention, which can be harvested when the outer ligulate flowers bloom.