First, choose the best species. In spring mulching cultivation, varieties with good precocity, strong lodging resistance, strong disease resistance, and strong adaptability should be selected. Such as short head 567DW, 667DW and other varieties.
Second, soil preparation and fertilization. The huge root system of oil sunflower, deep rooting under the root system, deep plowing of farmland can meet the requirements of deep rooting and absorption of water and fertilizer. The depth of ploughing should be stabilized at about 20 to 23 centimeters on a yearly basis. When plowing the land, Mushi Fertilizer Fertilizer 3000 kg, compound fertilizer 50 kg as the base fertilizer.
Third, the appropriate sowing. Spring sowing should be planted at 5 to 10 cm in 4 to 5 days at 8 to 10 °C. The suitable period in central and southern regions of the province is 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. Sowing density should be based on soil conditions, the general row spacing 50 cm, spacing 30 to 40 cm, sowing depth of 3 to 5 cm, fertilization of 4,000 acres left mulei, languid to keep 4000 ~ 4500 strains.
Fourth, field management. Oil seedlings need less water at the seedling stage and have stronger drought resistance, and seedlings should be used to promote root growth. Flower bud stage is the key period of water demand, if the weather should be combined with water-drying Muji compound fertilizer 20 kg, the depth of fertilization in the 8 to 10 cm. The flowering filling period is also a critical period of water demand, and it should be watered in time if drought occurs. Although the oil sunflower is tolerant to drought but not tolerable, it should be drained in time if the rainwater is too large. Most of the sunflower oil is made up of insects. If the pollination season is poor or pollinating insects are not enough to meet pollination requirements, pollination can be done by free-range bees or by artificial pollination. You can.
Fifth, 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 damage is mainly caused by oil sunflower aphids and cotton bollworms. When the prevention and control targets are reached, 1000-times of highly effective cypermethrin EC can be sprayed to prevent and cure; the main disease that damages sunflower is Sclerotinia sclerotiorum, and the field diseased plants should be promptly cleaned up. Agent spray control.
Six, timely harvest. Usually about 30 days after flowering, when the upper part of the plant 4 to 5 leaves and the upper part of the stem and the back of the dish yellow, the sub-shell becomes black or hardened, the seed is full and can be harvested in real time. In the early spring, the plastic film covering cultivation is generally 6 Harvest in late July or early July. After the harvest, the oil sunflower dish shall be spread out, air-dried, threshed, lifted, and stored in a timely manner.
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