1. Choose the best kind. Spring mulching oil sunflower should be selected early maturation, lodging resistance, disease resistance, and wide adaptability of varieties, such as short head 567DW, 667DW and other varieties. 2. Soil preparation. Plowing soil depth should be stable at 20-23 cm on a yearly basis. Combined with ploughing, Mushi farmyard fertilizer 3000 kg, compound fertilizer 50 kg. 3. Suitable sowing. Seed sowing at 5 to 4 centigrade in 4 to 5 days at 8 to 10 degrees Celsius. The suitable sowing date in mid-southern part of our province is in mid-March. Single and double grain can be used on-demand or on-demand 2 seeds per hole. The sowing rate is 400-500 grams. The planting density is determined by the soil strength, and the general spacing is 50 centimeters, the plant spacing is 30 to 40 centimeters, the seeding depth is 3 to 5 centimeters, the fertilized land is about 4000 strains of the left seedlings, and the inoculated seedlings are 4000 to 4500 strains. 4. Field management. Oil seedlings need less water at seedling stage, and seedlings should be used to promote root growth. Bud stage is the critical period of water demand. If the weather is drought combined with watering and ditching 20 mu of compound fertilizer, the depth of fertilization will be 8 to 10 cm. Flowering season should be timely watering in case of drought. Although the oil sunflower is tolerant to drought but not tolerable, it should be drained in time if the rainwater is too large. The majority of oil sunflower pollination is done by means of insects. If the weather during the flowering pollination season is poor or pollinating insects are few, the method of stocking bees or artificial pollination can be used. 5. Disease prevention and pest control. The underground pests of oil sunflower seedlings can be baited by poison baits. In the middle and late stage, the oil sunflower aphids and cotton bollworm are the main damages. When reaching the prevention and control targets, 1000 times liquid chlorine can be used to prevent and treat the highly effective cypermethrin EC. The main diseases are sclerotial sclerotia. The diseased plants in the field should be promptly cleaned up, and the sclerotia net should be used for spray control. 6. Timely harvest. Usually about 30 days after the final flowering, when the upper part of the plant 4 to 5 leaves and the upper part of the stem and the disc back yellow, seed husk black or hardened, the seeds can be harvested in real time and full harvest. Film mulching in early spring is generally harvested in late June or early July. Immediately after harvest, the oil sunflower dish will be spread out, air-dried, threshed, lifted, and stored, and sold at the right place. Tablet Candy,Confectionery Tablet,Replenish Blood Tablets,Ganoderma Lucidum Capsules Guangzhou Etechange Biological Engineering Co.,Ltd. , https://www.etechange.com