Oil sunflower emerges in a few days

Oil sunflower is the fifth largest oil crop in China. The extracted oil can extract high-grade edible sunflower oil with low cholesterol. At present, many growers will plant oil sunflower. How long will it take for the oil sunflower to emerge?

First, how many days does the oil sunflower emerge?

After planting, the oil sunflower can emerge within a week. Seedling replenishment should be checked in time after emergence, and transplanting with soil or budding should be carried out in time when a pair of true leaves are missing.

2. Cultivation techniques

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.

III. Use

Sunflower oil is recognized as a health oil, and its linoleic acid content is about 66%. Linoleic acid is an essential fatty acid for the human body, which helps to eliminate cholesterol and its products, can reduce arteriosclerosis and maintain blood pressure balance, especially beneficial to heart disease and hypertension; because of its low melting point, linoleic acid can be dissolved at 17 ℃-27 ℃ and is easily absorbed by the human body. Secondly, hybrid sunflower oil can also be used in industrial production. Hybrid oil sunflower belongs to semi-dry oil, which is of good quality and easy to refine. Its linolenic acid content is only 0.2%, and it has good dry oil properties, and the raw material used as paint will not deteriorate over time; when used in leather making, it will make the leather tough and bright. At the same time, it is also an important raw material for cosmetics, printing oil, margarine, pastry, plastic, resin, film, polyester, lubricating oil, spices, soap, lecithin and candles. The processed cruller is rich in nutrition and is a fine feed for livestock and poultry, and it is the best to feed dairy cows. Therefore, the market potential of oil sunflower is very broad.

The application of oil sunflower is very wide, and the prospect of planting is also very good. If there are conditions, it can be planted properly.