Sunflower oil is not strict on the soil, it can be cultivated in a variety of soils, from fertile soil to dry land, thin, saline-alkali land can be planted, which is one of the reasons for the wide adaptability of sunflower oil sunflower. The most suitable soil for planting oil sunflower is loamy soil and sandy loam soil. This type of soil pellets has a good structure, high fertility, loose soil, is conducive to the development of the root system, can provide good nutrition, moisture and air, and is conducive to stable production and high yield of sunflower.
Oil sunflower is a warm crop, but also a cold-resistant crop, and has good adaptability to climatic conditions. When soil temperature (0 to 20 cm) reaches 2°C, the seeds start to germinate, germination can occur at 4 to 6°C, and seedling growth can occur at 8 to 10°C. When the soil temperature is low, seedlings will prolong. In addition, emergence is closely related to seed quality, moisture, oxygen, and the composition and structure of the soil.
Generally, the effective accumulated temperature of ≥5°C from the emergence and maturation of sunflower oil is about 1850°C.
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