The chinese food safety net news (wing zheng) began its planting season at the beginning of the summer, when beijing city began broadcasting on sunflower. In order to improve the quality of sunflower landscapes and extend the viewing period for sunflower landscapes, the beijing city agricultural technology extension centre provided technical guidance on summer sunflower landscape cultivation。
Source: beijing rural agricultural advocacy centre
Selection of varieties according to local conditions
Sunflowers are divided into sunflowers for oil, sunflowers for food and sunflowers for viewing. Farmers can choose suitable varieties based on demand. The oil sunflower can be used to extract oil, which is the dominant sunflower landscape in beijing city, with plots that take into account the needs of tourists to photograph small head varieties, with ld1003, 567dws of about 110 cm high, suitable for adult photographs, and s606 and more than 160 cm high as a landscape background. Sunflowers are grown in beijing on a relatively small scale, and farmers with needs such as science, diets, and fried experience can choose an aura variety of ld5009s, usually nearly two metres high. The variety and diversity of sunflower species is such that growers may choose to grow according to the colour, height, and number of days to sow。
Source: beijing rural agricultural advocacy centre
Reasonable timing
The summer sunflower is suitable for planting between late june and 15 july. Premature seeding, excessive precipitation when a dish matures, prone to rot and disease, and heavy rain weather during harvests are not suitable for tan; late seeding is not normal. The viewing sunflower can be calculated for a suitable planting period, based on the target viewing period and the number of days during which it is planted. Land parcels for the purpose of sightings can be sown in error and extend the observing period。
Adjust appropriate density
Due to the high density of sunflower and its susceptibility to disease, rational thinning techniques are promoted. A variety of 170 - 200 centimetres is suitable for density control at 2100 - 2,500 acres; a species of 100 - 170 centimetres is desirable for density control at 3,000 - 4,000 acres; and a species of acacia about 50 centimetres is suitable for 5,000 acres per acre. Specific densities depend on the variety, with an appropriate increase in soil density。
Fertilizer management
The sunflower is more drought-resistant and usually waits for rain to sow. (c) the availability of seedlings with irrigation conditions to ensure that they are well established. Fertilizing acres used for urea 20 kg, ammonium 20 kg, potassium sulphate 15 kg as bottom fertilizer, current urea 5-10 kg and ammonium 10 kg。
Getting it in time
The aces and aces should be harvested when they turn yellow on the back of the plate, the rod is yellow, the tongue flower is removed and the seed shell is hard。
