Site preparation. Choose fertile loam or sandy loam with flat topography and well-drained and arable land. After the ploughing, it will be finely soil-graded to achieve no darkness. Then according to the form of planting trenches, the general depth of 20-25 cm. Such as the size of rows planted, a large row of 100 cm, a small row of 50 cm, and other row spacing planting, row spacing is 70 cm.
Selection of plants. The use of ramets for planting can be planted in the spring and autumn, but it is best to plant in the fall. Autumn is best for autumnal equinoxes, and spring planting is thawed to the Ching Ming Festival. When planting, the plant type should be selected to be robust, and the ramets should be kept for more than three years, and 2/3 of the original strain should be kept. One third of the ramets should be removed with the soil as seedlings, and the grading should be used to ensure the uniformity of the field. The distance between the points is 40-50 cm, with 3-5 strains per hole. After planting soil compaction, apply 500-600 kilograms of water to human urine per acre to ensure the survival rate, and then water the pragmatic soil.
Post-plant management. After transplanting and survival, we should timely cultivating and weeding, drought and watering, and encountering drainage, the soil moisture content should be maintained at 20%, generally 3-6 times of watering a year, combined with watering, 8-10 kg of urea be recovered before pumping, and phosphoric acid II. Potassium hydrogen 3-4 kg, promote sturdy, multi-branched, early bud. Before freezing, apply 30 kg of calcium phosphate per acre, 500 kg of human excrement or 15-20 kg of urea. After the winter, the old leaves and the dry leaves are cut off from the ground 3 cm away, and artificial earthing is performed to prevent freezing damage.
Pest Control. Diseases that cause damage to day lily mainly include rust and leaf spot. There are mainly spider mites, aphids, beetles, tigers, and earthworms. In the prevention and control, a combination of agriculture, biology, and chemical control should be used. The main agricultural and biological measures should be supplemented by chemical control. Chemical agents should be highly efficient, low-toxic, and low-residue preparations, so that timely medications can be used to ensure production and quality.
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