When is the best time to plant safflower?

Sowing time: Sowing can be done when the ground temperature is stable above 5℃, and early sowing can increase the yield. The suitable sowing date of safflower in this area is generally from late March to early April.

First, seed treatment

Seed preparation is to clean the seeds before sowing, remove small and incomplete grains, and then turn them over and dry them. Because safflower is an oil crop, it should be dried in sunny days with low air humidity 1 ~ 2 days, avoiding exposure at noon or drying in strong light for a long time. Before sowing safflower in autumn in southern China, it is customary to soak 10 seeds in warm water at 50℃, then cool them in normal temperature water, take them out and dry them, and wait for sowing. The purpose of soaking seeds in warm water is to kill the mold on the surface of seeds by absorbing water and accelerate the germination of seeds.

Second, the sowing method and sowing amount:

The sowing method adopts a grain seeder for row sowing, with equal row spacing of 45㎝, sowing depth of 4 ~ 5 ㎝, and evenly sowing 50 grains per meter. The sowing line is straight and the sowing depth is consistent. No rebroadcasting, no missed sowing, tight soil covering, practical suppression, and the sowing amount per mu is 5㎏.

Field management at seedling stage

(1) spacing: After the seedlings of Carthamus tinctorius grow completely, the spacing between seedlings can be set to 1 ~ 2 ㎝, which is beneficial to promote the uniform growth of seedlings.

(2) Sowing: When the seedlings grow 5-6 true leaves, start planting with a spacing of 5-7 ㎝, remove the small leaves and leave the big ones, and remove the weak ones and leave the strong ones.

⑶ Seedling density per mu: High fertility soil has strong branching ability of safflower, and the seedling density per mu is sparse, with an average spacing of 7㎝. The seedling density per mu is 2 1 1,000 plants. The average plant spacing of medium fertility soil is 6㎝. The density of seedlings per mu is 24,000. Carthamus tinctorius has weak branching ability in low fertility soil, and the density of seedlings per mu is dense, with an average spacing of 5㎝. The density of seedlings per mu is 29,000.

(4) Timely intertillage weeding: In case of rain after sowing, the hardening should be broken in time to uproot weeds beside the seedlings. The first intertillage should be shallow, with a depth of 3-4 ㎝, and then gradually deepen to 10㎝, so as to prevent the seedlings from being injured by pressing during intertillage. Tillers should be weeded 2 ~ 3 times before irrigation.