(1) Selecting iron species. It is better to grow sunflower seeds in the sand and soil surrounding areas. The sunflower planted with this seed has a strong trunk, strong petiole, high germination rate and easy growth; seeds in the near water garden are poor.
(2) Planting. Seeding seedlings are planted around the winter solstice, with a distance of 5 inches, and germination in the second and third months of next year. About three years, about six or seven palms can be transplanted to Kwai Tin. The leaves were cut 3 years after transplantation. Therefore, it takes only six or seven years for the sunflower to harvest.
(3) Fertilization. Fertilization is carried out every year before the Spring Festival, during the Dragon Boat Festival and Mid-Autumn Festival, with nitrogen fertilizer as the main. 40-60 kg per acre during the sowing period. After transplanting, the annual fertilization will be gradually increased from 60 kg in the first year to about 150 kg per year.
(4) Weeding. 2-3 times a year.
(5) Whole hoe, water conservancy, pest control, etc.
Pu Kui is adaptable and can withstand a certain degree of waterlogging, drought and low temperature of about 0 degrees. Pu Kui Xi is well-lit, but when planting in the north, do not put it in the hot sun in the spring and summer, not on the south side of the building, in case the radiant heat reflected from the wall is used to bake the leaves, preferably placed in Cultivate and maintain the north side of the building or the shady area of ​​the tree. Potted plants should be kept under the shade in the summer and pay attention to ventilation.
Before mid-October, it should be moved into the greenhouse for winter, and the room temperature should be no less than 5 degrees to safely overwinter.
The iron wood season should always add water to the plants to increase the air humidity. If the water is not watered for one day in the summer season, the leaves will be wilted and even dead. Although there is a certain ability to resist cockroaches, the rainy season should also pay attention to drainage and flood control.
Apply liquid fertilizer twice a month from the beginning of May to mid-September, and do not need to topdress the rest of the time. Fertilizer application should be based on nitrogen fertilizer during the growing period.
When cultivating, the humus culture soil can be used as potting soil, and the soil should be changed once every 2-3 years, and the plants above 10 years old should be placed in the wooden barrel.
Sowing and breeding, the production area is more than the autumn and winter sowing, but it can be broadcast in the north. The washed seeds are first germinated by sand. Seeds that have just sprouted through the seed coat are spotted on the seedbed. After sowing, they can germinate one month later and germination 60 days later. The seedling period is fully watered to avoid direct sunlight. When the seedling grows to 5-7 large leaves, it can be planted and potted.
Pests and diseases: Strong resistance to pests and diseases, common diseases include leaf blight, anthracnose, brown spot, leaf spot, and blight. The main pests are green moth and moth.
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