First, the selection of superior varieties should be selected early maturing, lodging resistance, disease resistance, adaptability of oil sunflower varieties, such as dwarf bighead 567DW, 667DW and other varieties.
Second, the soil preparation and application of oil sunflower roots is huge, deep roots under the roots, deep plowing can meet the deep roots, absorbing water and fertilizer requirements. The depth of ploughing should be stable at 20-23 cm on a yearly basis. When the land is plowed, Mushi Fertilizer Fertilizer 3000 kg, NPK fertilizer compound fertilizer 30 kg as the base fertilizer.
Third, the appropriate time sowing 5 cm soil layer 4-5 days stable at 8 °C -10 °C when sowing, suitable for sowing in mid-south region of our province is in mid-March. Single and double grained seedlings can be used on-demand or on-demand 2 seeds per hole. The sowing rate is 400-500 grams per mu. Sowing density should be based on soil conditions, the general spacing 50 cm, spacing 30-40 cm, sowing depth of 3-5 cm, fertilization of 4,000 acres of Mu Liumiao, infertile Mu Mu 4000-4500 strain.
Fourth, the field management of sunflower oil seedlings less water demand, drought resistance is strong, it is appropriate to carry out seedlings to promote root growth. Flower bud stage is the key period of water demand, if the weather should be combined with water, planting ditch Mushi three yuan compound fertilizer 20 kg, fertilization depth in the 8-10 cm. The flowering filling period is also a critical period of water demand, and watering should be timely 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. Oil sunflower pollination is usually done by insects. If pollinating weather is poor or pollinating insects are not enough to meet pollination requirements, pollination can be done by means of free-ranging bees or artificial pollination, and gently pairing a pair of flower disks together. Just click.
V. Disease prevention and control pest control The main disease of oil sunflower is Sclerotinia sclerotiorum. When there are diseased plants in the field, it should be promptly cleaned up and used to prevent and cure with sclerotium and other agents. The seedling pests of sunflower oil are mainly underground pests and can be baited and killed by poison baits. In the middle and later stages, they are mainly susceptible to aphids and bollworms. When the control targets are reached, 1000-times of highly effective cypermethrin EC can be sprayed.
Sixth, timely harvest general sunflower oil 30 days after the final flowering, when the upper part of the plant 4-5 leaves and stalks and the back of the disk yellow, the sub-shell becomes black or hardened, the seeds are full, real-time harvest, early spring Film mulching cultivation is generally harvested in late June or early July.
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