How many kinds of oil sunflower are used per mu

Oil sunflower seeds extract oil, can extract low-cholesterol high-grade edible sunflower oil, many people will grow oil sunflower. So how many kinds of oil sunflower do you use per mu?

1. How many kinds of oil sunflower are used per mu

Oil sunflower one mu of unobstructed need to prepare about a jin of seeds, maintain a distance of 50 cm, according to 30-40 cm hole spacing, 2 seeds sowed together in a small hole with a depth of about 3-5 cm, and then do a good job in field management and water and fertilizer conservation.

2. Cultivation techniques of oil sunflower

1. Sowing: sowing oil sunflower first master the temperature and pay attention to the weather change. In general, oil sunflower can be sown when the soil temperature can be kept above 5 ℃. If the temperature is too low, it will affect the emergence rate, and the seedlings are vulnerable to frost. At the same time, attention should be paid to the sowing depth, which is generally maintained at 3-4cm. In addition, reasonable close planting should be carried out to improve the yield of oil sunflower.

two。 Management: in order to ensure the emergence rate of oil sunflower, soaking seeds should be carried out before sowing. After emergence, to replenish seedlings in time, the best way is to transplant seedlings, replanting time should be placed in the evening or cloudy days. When the seedlings grow to two pairs of true leaves, the seedlings should be fixed, and the principle of seedling determination is to retain large and strong seedlings. For the plots with poor soil and serious damage caused by pests, the fixed seedling stage should be postponed according to the situation.

3. Fertilization: ploughing can loosen the soil, prevent consolidation, reduce water evaporation, eliminate weeds and reduce unnecessary nutrient consumption. Especially after a rainy day, ploughing must be carried out in time. Although oil sunflower does not have high requirements for soil, but fertile land is more conducive to the growth of oil sunflower. Therefore, in the whole growth process of oil sunflower, topdressing should be carried out timely to enhance its ability to resist natural disasters. For the plots with poor land and insufficient bottom fertilizer, the amount of topdressing should be increased in the budding stage. Topdressing is generally applied in acupoints or in ditches. Urea and compound fertilizer are suitable for topdressing.

4. Pollination: oil sunflower belongs to cross-pollination, and insects are the main medium of pollination. Therefore, when the pollination medium is not enough, oil sunflower should be artificially pollinated. There are two main methods of auxiliary pollination: one is to use a tool to collect the pollen from the bud and gently wipe the pollen against the disk with a pen or a soft brush. Another method is the disk contact method. In the full bloom, put the two adjacent disks opposite each other, gently rub to get the effect of mutual pollination. Due to the large planting area of oil sunflower, artificial pollination will inevitably consume a lot of manpower, which is more difficult, the best way is to use insects as the most scientific and ideal vector. For example, raising bees near the oil sunflower planting land is not only conducive to the growth of the oil sunflower, but also has honey harvest, killing two birds with one stone.

Oil sunflower can extract oil and residue and can also be used as protein feed. Sunflower plates and straws are also used accordingly, and the economic benefits of planting are still very good.