1. Use excellent seeds. Spring sowing should use varieties with good precocity, short straw, high yield, and stable yield, such as the short-headed 567DW and short early morning hybrids. Eas anti-theft antenna is mainly suitable for large supermarkets, shopping malls, bookstores, audio stores with Security hard tags, rf soft label, AM lable,Pin and Lanyard, eas detacher, Hook Lock,EAS Self Alarm Tag, EAS Safer Box,etc. WENZHOU BOSHINE ELECTRONIC SECURITY CO.,LTD , https://www.cnboshine.com
2. Soil preparation. The roots of oil sunflower are developed and have strong absorption capacity for nutrients. In order to achieve high yields, basic fertilizer must be applied. General Mushi rotted farmyard fertilizer 5000 kilograms or dry chicken manure 5 cubic meters, ternary compound fertilizer 50 kilograms, even after the deep cast.
3. Early sowing. Oil sunflower is highly resistant and has a short growing period and should be sown early. The flowering season can avoid the high temperature and rainy season, increase the rate of self-pollination and reduce the empty shell rate. Generally sowing in late March, more use of sowing, put 2 per hole, spacing 50 cm, spacing 30-40 cm, depth 3 cm, mu density of 3800 or so, about 800 grams per mu. The use of plastic mulch cultivation will enable early sowing, early harvesting, and avoiding the risk of lodging during the rainy season.
4. Field management. After the emergence of seedlings in time to make up the seedlings, in the long 2-3 pairs of true leaves, combined with cultivator weeding Dingmiao. Early low temperatures and slow growth of seedlings should be 2-3 times of cultivating, in order to increase the temperature of the soil, promote the roots down, and enhance drought resistance. After entering the budding period, it is also the peak period of water demand, and sufficient water supply should be ensured. When the formation of the disk, often keep the soil moist, flooding should not be flooded, in case of heavy rain should be drained. Mu combined with watering urea 10 kilograms, the end of the potash fertilizer is insufficient, Mushi potassium sulfate 10 kg. After entering the grain filling stage, potassium dihydrogen phosphate fertilizer can be sprayed to increase grain weight and seed setting rate.
5. Control pests. At the seedling stage, the main underground pests are ground tigers, earthworms, cockroaches, etc., and 50% of the phoxim or chlorpyrifos 1000 times solution can be sprayed on the surface. The main insect pests in the seeding stage include cotton bollworm, Spodoptera litura, corn borer, beetle, and wasp, etc., which can be controlled by pyrethroid pesticides. It is forbidden to use drugs during the flowering period to avoid killing the bees and causing adverse effects of disk pollination on the seed setting rate. It is also possible to use an artificial method of catching insects and use lice to eliminate pests.
6. Timely harvest. Early spring sunflower oil is generally harvested from the end of June to the beginning of July. Harvesting premature kernels is not full, and the maturity is low, which seriously affects the yield and quality. Harvesting too late can easily result in shedding of grains, resulting in reduced yields. At the same time, entering the rainy season, it is vulnerable to rain and is not conducive to the normal drying of sunflower seeds. The harvesting standard is that the back of the sunflower plate turns yellow, the loquat leaves turn brown, the stalks yellow, and the grains harden. After harvesting, select sunny weather and dry it in time.