The use of the remaining space for summer crops to grow oil sunflowers is an important way to increase the multiple cropping index, increase farmers' income, and increase the overall efficiency of agriculture. 1. Selecting the best varieties The high-yielding varieties suitable for planting in our district mainly include G101 and transporting sunflower. 2, pouring sole (墒) water, Shizu base fertilizer sunflower seed top soil is weak, should be shallow sowing, generally 3 ~ 5 cm is appropriate. Saturate the bottom water about 7 days before sowing, and be sure to plant enough seeds to ensure that you have a full seedling. Reapply basic fertilizer, generally Mushi farmyard fertilizer 1500 ~ 2000 kg, 25 kg phosphorus nitrate, urea 10 ~ 15 kg, 25 kg of potassium fertilizer. 3, the appropriate period of sowing oil sunflower growth period is short, generally about 85 days, sowing date should be held in late June is appropriate, this will not affect the sowing of crops, but also make the sunflower bud blossom just in late July Or in early August, to avoid high temperature and drought, it is beneficial to the pollination of oil sunflower. 4. Proper density planting requires 0.25-0.3 kilograms per mu, 60-65 centimeters of road, 25-30 centimeters of plant spacing, 3,500 leaves per mu, and generally no more than 4,000. 5, to strengthen field management Seedling emergence of a pair of true leaf time seedlings, two pairs of true leaves when Dingmiao. Seedlings are generally not watered. Flowering buds are the peak of the water requirement for oil sunflowers. At the same time, it is a critical period for the formation of sub-solids. It should be watered as appropriate, and at the same time it can be combined with watering, and ammonium recovery is 15 to 20 kilograms. 6. Artificially-assisted pollination The oil sunflower is a cross-pollination crop. The rate of self-pollination is 1%, and the pollen is heavier, requiring insect or artificially-assisted pollination. There are many methods of artificial pollination, most of which use powder puffs to pollinate. The specific method is to lay a layer of cotton on a cardboard or three-ply board with a diameter of about 10 centimeters and to cover it with a gauze or towel. During pollination, several taps on the faceplate are performed one by one so that the mixed pollen sticks to each faceplate, completing the pollination process. Bee pollination may not be artificially assisted in pollination. Generally, a box of bees can be placed every 5 mu of land. 7, timely harvesting oil sunflower growth period is generally 85 days or so, in the mature period should pay attention to observe the changes in the color of the disk, the grain color from gray to oil black, when the disk as a whole dry than timely harvest. 8. After the straw is returned to the field, the sunflower is harvested and the straw is chopped and returned to the field. Oil cakes can be used for feeding, but also fertilizer land, can increase soil organic matter, to achieve a virtuous cycle of planting and breeding.
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