It is a famous garden ornamental and garden green tree species, and it is also a valuable family potted plant. The following is a brief introduction of its breeding methods.
1. Seed-picking for mother trees that have more than 20 years of age, with good tree crowns, robust growth, no pests and diseases, and strong yield per plant. After the fruits ripen in October, the seeds are sown in time, spread in the sun, and the wings are removed. Immediate autumn sowing is also available. It is sown in spring, but after the seeds are removed, they should be stored in layers with wet sand to prevent the seeds from losing their vitality.
Second, the selection and treatment of nursery land nursery selection of deep fertile soil, adequate water, well-drained sandy loam. Early winter deep nursery, 100 kg per mu compound fertilizer, 50 kg of vegetable cake fat, calcium and magnesium phosphate 20 kg as base fertilizer. The seedbed is 1.2 meters wide, the bed is 25 centimeters high, and there is a good drainage ditch around it. 7 days before sowing, 43.5 % formalin solution was used per acre, and 600 kg of water was added to prepare a disinfectant solution. The bed surface was evenly sprayed and immediately covered with a film. The two days before sowing were removed.
3. Seed treatment before sowing, washing, and seed selection, selecting seeds for development with a healthy development, fullness, large grain, high germination rate, strong vitality, and no pests and diseases.
2 to 4 days before sowing, the concentration of 40% formalin plus water (1:200) was diluted to 0.2% solution, soaked for 10 minutes, taken out and sealed for 1 hour, then the seeds were diluted and dried to sow. However, the disinfected seeds should be immediately sown so as not to reduce the germination rate and germination potential.
Fourth, the sowing rate of 5 kilograms per acre is about to be sowed in February. On a flat bed, open a width of 5 centimeters.metres and a row of 15 centimeters south-north furrows. Fill enough bottom water to evenly spread the seeds in the ditch. Cover the soil with seed not seen. Do not cover it with too thick.
V. Seedling management seed about 40 days after sprouting, should pay attention to field observation, timely weeding, spraying, prevent seedling blight and so on. The next sentence in April, the first time the seedlings, left seedlings per square meter 50-55 The second time the seedlings were in the middle of July, with 35-40 strains per square meter. Before and after the seedlings are sprayed with water. The seed production per mu can reach 1.3-1.5 million.
After 7 days of first thinning, a small amount of nitrogenous fertilizer was topdressed at a concentration of 0.3%-0.5% and applied 1.5 kg per acre; thereafter, once every 20 days or so, the concentration was 1%, and 3 kg per mu was applied. After each fertilization, the seedlings should be cleaned to prevent the occurrence of fertilizer damage. From August to the end of September, fertilization is completed.
During the growth of seedlings, weeding work should be done to ensure the rapid growth of seedlings. In July, an arbour was erected to prevent sunburn and the shed was removed in October. The next spring equinox will be planted and the two-year-old seedlings will be transplanted. For home potted plants, one-year-old seedlings should be properly pruned and reshaped to create a beautiful tree shape.
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The Greenhouse Film Manual Roll Up Unit can roll up a length of 60-80 meter, running stably with fine out side looking and long time of usage. The inside drive gears are made of high quality steel with fine workmanship, and what is more, there is lubricating bearing assembled on the out put and input shaft. At the meantime, there is also a group of reverse gear added to it. All these make the unit to be light and easy for
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