When digging seed plants, you should take out the whole root of the plant (or take it out of the pot), and then gently break off the excess soil with your hands, leaving only some protective soil. When storing seed plants, you can shovel out a ditch and put it neatly, leaving no gap as far as possible. Cover the roots tightly with soil after planting, and pay attention to that the plants are flush with the soil surface. Water it once after hoarding. The suitable temperature for plant preservation in winter is 0-5℃.
Second, cutting propagation.
1.In late March, select cuttings, plant overwintering seed plants in greenhouse with row spacing of 30*40 cm, trim seed plants (stubble leveling), and do well in fertilizer and water management. Cuttings are usually carried out in April and May in spring. If there are few propagation materials, cutting can be carried out in February and March. Choose the foot buds of chrysanthemum germinated in winter as cuttings, or cut strong shoots with the top length of 8- 10 cm as cuttings, and pick the cuttings repeatedly. After the cuttings are picked, they are immediately immersed in water and inserted when they are picked. Before cutting, the leaves at the base of the cuttings are removed, and only the upper three or four leaves are kept to reduce water transpiration.
2. Cutting can be carried out in bed or seedling tray, and the substrate is humus soil or pastoral soil mixed with a small amount of river sand or cinder. 400 times of 25% carbendazim solution was sprayed evenly on the bed surface for soil disinfection. The cutting depth is about one third of the depth of cuttings. After transplanting, compact the soil, water it with a watering can, and sprinkle water around the transplanting bed to increase air humidity. Immediately after insertion, establish a shade to prevent direct sunlight and reduce water evaporation. Generally covered with film to keep warm and moist. From 9: 00 a.m. to 4: 00 p.m. every day, open the film for ventilation according to the temperature and humidity, and often spray water around the slotted bed. After a week, the cuttings began to take root and the spray waves gradually decreased. As long as the soil is kept moist, it will be exposed to light sooner or later. In about two weeks, most cuttings take root, as long as the soil is kept dry, the film is removed and the light is gradually seen.
The optimum rooting temperature of cutting ground cover chrysanthemum is between 15-20℃. If the temperature is too low, the rooting time will be prolonged, and if it is too high, the cuttings will easily rot.
Third, colonization.
Chrysanthemum can be planted in fields or potted plants 25-30 days after cutting. The row spacing of open-field plants is 30*40 cm. After the ground cover chrysanthemum seedlings are delayed, they should be picked in time, leaving only 4 leaves for more branches.
In the early stage of growth, chrysanthemum needs multiple intertillage weeding to enhance the air permeability of the soil. The ground cover chrysanthemum likes fertile sandy loam with good drainage and is afraid of waterlogging. In order to prevent waterlogging in rainy season, when the plant grows to 20-30 cm high, it can be combined with fertilization and soil cultivation, and the decomposed sesame paste residue or cake fertilizer can be scattered near the seedlings for cultivation.
Fourth, fertilization.
Dali Chrysanthemum likes fertilizer, and foot fertilizer should be applied before planting. Generally, decomposed animal manure, cake fertilizer, sesame sauce residue, a small amount of bone meal and calcium superphosphate are mixed, and the above farmyard manure 1 0,000-10,500 kg is applied per mu. Urea, cake fertilizer, etc. Topdressing should be applied at the initial stage of ground cover chrysanthemum growth. After entering the flower bud differentiation stage, especially during the flower bud pregnancy, phosphorus and potassium compound fertilizer should be applied, and 0.2-0.5% potassium dihydrogen phosphate and 0. 1% urea solution should be sprayed once a week. Topdressing outside the root is effective quickly, which can accelerate its growth and make its leaves dark green and bright in color.