Sunflower planting time How is sunflower seed planted? Sunflowers can be planted in all seasons, often in summer and winter. The flowering period can be more than two weeks. Except for the appearance of the sun, the flowers are bright and generous, suitable for ornamental decorations. The seeds are more economical and can be used as a substitute. The favorite sunflower seeds can extract high-grade edible sunflower oil with low cholesterol. Let's take a look at how sunflower seeds are grown together!
For the cultivation of selected land preparation sunflowers, the land should be flat, the fertility should be medium, the irrigation and drainage should be convenient, and the soil with relatively small soil viscosity should not be heavy. The seedlings are progeny, and peat soil is suitable for sowing. Seed dressing with new high-fat membrane before sowing can repel underground pests, isolate virus infection and increase seed germination rate.
The sowing time for timely sowing sunflower is generally from March to April, and the suitable temperature for sowing is 18 to 25 ° C, usually 5 to 7 days after sowing. The basic principle of sowing date selection is based on the regularity of salt and alkali, suitable early or late sowing, so that the seedlings avoid salt and alkali. Spring or summer sowing according to the growth period of the variety.
Chatian replanting sunflower is a dicotyledonous crop. It is more difficult to top out the soil. In addition, the soil preparation, the quality of the sowing is not high, or the soil surface of the rain after the sowing, or diseases, insects, rats, and birds are all harmful. . In order to ensure that the whole seedlings are broadcasted, it must be checked line by line in the seedling stage, and the seedlings should be replanted in time.
Interplanting seedlings and sunflowers should be planted early, prevent seedlings from being seeded, affecting the cultivation of strong seedlings, and even future yields. As for the saline-alkali land and heavy insect plots, the seedling time can be appropriately postponed. At the same time, the sunflower should be fixed early, which is conducive to the cultivation of strong seedlings, and is also conducive to the development of the flower disk. The seedlings should be carried out in two pairs of true leaves.
The cultivating weeding sunflower is generally cultivated 2 to 3 times to remove the grass and loosen the soil, remove the knot, save the water, reduce the evaporation, reduce the damage caused by the salt and alkali, etc. The first cultivating in the 1 to 2 pairs of true leaves combined with the seedlings and seedlings, the first 2 times of cultivating was carried out 1 week after the seedling was planted, and the 3rd cultivating was combined with ditching, soil cultivation and fertilization before sealing the ridge.
Ditching and topdressing sunflower is more like fertilization. Ditching and topdressing are usually carried out during the third cultivating. Nitrogen and phosphorus fertilizers are mainly used, 5 kg of diammonium phosphate per acre and 10 kg of urea, which are mixed and applied to the soil. Through ditching soil, it can effectively ensure the growth of secondary roots, prevent lodging, and reduce the branches of the bases below the cotyledonary nodes.
The timely irrigation of sunflower irrigation is carried out by furrow irrigation. The general plant height is 1.5 meters. The head water should be carried out in the flower bud stage. The second water is in the early flowering stage and the three water is in the filling stage. For plants with a plant height of about 2 meters, the head water is carried out 4 to 5 days before flowering (severe drought, irrigation is advanced), and the second water is 6 to 7 days after head water, and the water is in the filling stage.
Branched protective sunflowers have the habit of growing branches between leaf axils, which occur in the bud to flowering stage, and consume nutrients, which have a great impact on yield and quality. At least three times of this stage are to be smashed. Snoring should be "playing early and playing small", and the tender little cockroaches will fall off, saving effort and not hurting the stems and leaves. It is necessary to pay attention to the middle and upper leaves firmly unable to fight. As for the lower old leaves in the late growth stage, in order to facilitate ventilation and light transmission, and reduce pests and diseases, a small part can be destroyed.
This article URL: sunflower planting time sunflower seeds how to plant [Figure]
Unviersal Adhesive Bandage,Universal Water Repellent Plaster,Strong Adhesion Adhesive Bandage,Cotton Plaster
RFX+CARE Manufacturing Co.,Ltd. , https://www.rk-rfxcare.com