one. Selection of nursery: The best choice for seedlings of C. cusmifolius is soil with deep soil, loose structure, many humus and well-drained soils. It is also possible to use woodland needles or broad-leaved mixed forests for intercropping. Mu sowing 80 pounds germination rate of 90% This breeding base has been conquered the harringtonine in March has been conquered the cephalozoic seed dormant long, cutting seedling rooting and other technical problems, and screen out the harringtonia quality saplings.
two. Soil fertigation: Newly cultivated land is more fertile and can be used without fertilization. The old land must be well-grounded, usually deep-turned 20-25cm, bed height 15-20cm, width 1.2cm, unlimited length. Apply appropriate amount of decomposed basal fertilizer, and then use 1.5 kg of phoxim and ferrous sulfate in an appropriate amount per mu to eliminate underground pests and adjust soil pH. Two weeks before sowing, seedlings were sterilized with 0.3% potassium permanganate or formalin solution. Penetrate 20-30 centimeters. After pouring, seal it with plastic film. Open it after a week and sow 5 days after sowing. Drilling, on demand can be.
three. Seed germination: (1) New seed germination sowing method: Before seed sowing, first disinfect with 1% -2% concentration of copper sulfate solution for 5 minutes, then rinse with water, then use 50 degrees of liquor and 40 degrees of warm water (1: 1) soaking 20-30 minutes, remove and then soaked with 0.05% gibberellin for 24 hours, induce the production of hydrolytic enzymes, break the seed dormancy, and promote its early germination. (2) The method of burial and germination every other year: the seeds are soaked in warm water (about 45°C) for 3-4 days. When the kernels become milky white, they are removed with a 1%-2% copper sulfate solution, and then mixed with three times wet sand. Uniform (60% moisture fine sand) is placed in a straw bag or wooden box and placed in the underground cellar. The cellar should be selected in a high-lying, well-drained area with a pit depth of about 1.5m to prevent rodents from entering. In addition, the cellar temperature should be checked frequently. In summer, the temperature must not exceed 20°C. When the temperature of the window is high, an arbor can be set on the window or the window door can be opened to cool at night. Using this method, the seeds are generally stored in the autumn, fully buried in the second year, and the seeds are taken out in the spring of the third year, spread for 2-4 days, and the seed can be sown when 20%-30% of the seeds germinate. (3) The seedlings of Taxus chinensis are slow to reproduce (generally 2 years). The harringtonine must have overcome the technical problems of dormant seedlings and rooting of cuttings of C. cusmifolia in February, and screened out high-quality saplings of harringtonia. (4) Wintering burying and germination method: This method is suitable for seeding with seeding, that is, removing seed coats from fresh seeds in the autumn of that year, and soaking in seed then disinfecting them and then mixing them with sand (the method is basically the same as every other year). 20-30 days before the seeds are removed, placed in the leeward spread to the sun in the shade, cover the plastic film to increase temperature, and pay attention to watering to keep moist, until part of the seed shell can be used for seeding cracking.
four. Seedling management: (1) arch protection seedlings: If using flat film dense seeding seedlings, seeds often need to check, see the radicle whitening that is to cover, change the flat membrane for the arch membrane moisturizing germination. After changing the arching film, the temperature and humidity should be adjusted, and on sunny days, the two agricultural films on the shed should be opened, and the temperature should be reduced and the air should be changed. The seedlings were sprayed once every 3-4 days to maintain the humidity of the seedbed at 55%-60%. To prevent rat damage. When the seedlings have 2 leaves and 1 heart, the seedlings should be uncovered. (2) Sparse seedlings and sparse planting: The amount of seedlings for cultivars of yew cedar is generally about 200 grains per square meter. If the seedlings are too dense and the seedlings have 3-4 leaves and 1 heart, they must be planted at a spacing of 15 cm and 20 cm. Transplanting seedlings. (3) Weeding and topdressing: Weeding and weeding should be carried out 2-3 times, combined with 5–10 kg of urea and 3–5 kg of potassium chloride per acre per cultivator, and applied to water or flooding. Foliar can also spray 0.25% of urea and potassium dihydrogen phosphate. (4) Pest control: The cephalopods have strong resistance to insects, fewer pests and diseases, and occasional spiders or aphids may occur. The pesticides such as dichlorvos and dimethoate can be sprayed and used for prevention and control. (5) 2 years old bed seedlings: can be applied to decomposing animals dilute urine 3-5 times, ammonium sulfate 1-2 times, timely flushing with water after spraying seedlings, in order to avoid phytotoxicity, from June to July and then applied potassium fertilizer, Increase the degree of lignification of seedlings. In addition, we must strengthen field management such as weeding and ripping.
Cloth Diaper Liners,Cloth Diaper Liners,Thirsties Hemp Inserts,Disposable Changing Pads
Shandong Kangshun Daily Products Co., Ltd , https://www.centurybenifit.com