In recent years, the United States has introduced the United States hybrid oil sunflower G101 and other varieties, the production practice is known as the saline-alkali land "pioneer crops." After two years of planting in Shandong's Jiaodong region, G101's output exceeds 400 kg/667 square meters. In the frost-free period of about 200 days (Huanghuaihai Region, about 35 degrees north latitude), it can be planted for two seasons in a year. Practice has shown that planting prospects are strongly promoted. considerable. Characteristics G101 is a thermophilic short-day crop with developed root system, lodging resistance, wide adaptability, strong stress resistance, and high salt and alkali resistance (0.77% soil salinity and annual rainfall of 400 mm ), Drought-resistant and resistant. The spring sowing period is about 100 days, and the summer sowing period is about 85 days. Resistance to rust and gray mold, it is resistant to high temperature and low temperature, can germinate at 4 °C, 5 °C can emerge, seedlings can withstand several hours -4 °C low temperature, late autumn when the temperature can still be normal growth and maturation. Plant height is about 150 cm and stems are hard. Cultivation Techniques Sowing Seasons and Sowing Dates Spring mulching in the Middle of March in Jiaodong uses mulch film coverage, and the second cropping (season) sowing season is best in early July. The above two sowing schedules can avoid heat hazards, which will facilitate pollination and fertilization to increase production. The seeding rate and cultivation density are 0.5 kg per 667 m2. The density controls the principle of thin and dense land. The size and size of the land are used. The size of the big line is 60 centimeters and the small line is 40 centimeters. Enough to sow. Scientific fertilization applied 667 square meters of high quality farmyard fertilizer 3--5 tons, three-element compound fertilizer 50 kilograms, and potassium sulfate 15 kilograms as base fertilizer. In the budding stage, topdressing 15 kilograms of urea or 20 kilograms of ammonium bicarbonate. Field management In order to increase production, the bees can be placed in the ground or in the field to help pollinate, and pollination can be artificially assisted when unconditional. The use of seed coating agents can prevent and control underground pests, and at the seedling stage, they can prevent and control the occurrence of pests such as tigers, and at the bud stage, they can prevent and treat cotton bollworms and aphids, and can prevent and treat diseases.
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