Cedar, native to the Himalayas at an altitude of 1500-3200 meters and the Mediterranean coast of 1000-2200 meters. It is an evergreen tree species. It prefers to grow robustly in acidic soils with milder climates, cooler, deep soils and good drainage properties, and is a light-loving tree species.
Propagation Method:
Propagation methods are generally divided into sowing propagation and cuttings propagation.
Sowing and propagation:
Generally, in mid-to-late March of each year, the amount of sowing per mu is generally 5Kg. Sowing land should choose well-drained, well-ventilated soil as seedbed. In addition, before sowing, soak the seeds with cold water for 1 to 2 days, and sow seeds after drying, generally in about a month can reach a germination rate of 90%. In the seedling formation stage, attention should be paid to shade, and at the same time attention should be paid to the control of cataplexy and underground pests.
Propagation of cuttings:
Cedar can be propagated in both spring and summer. Spring cuttings are usually carried out before the 20th of March, and summer cuttings are better in mid-to-late July. Spring cuttings, generally choose the annual robust branches of the mother tree with a smaller age, and can be dipped for 6-10 seconds with 500 mg per liter of naphthaleneacetic acid for 6-10 seconds, which can promote rooting and improve the survival rate of cuttings. The depth of cuttings is 5-8cm, the plant row spacing is 5 * 10cm is appropriate, and then fully watered after cuttings, and a shading shed is set up. In summer, it is best to choose semi-woody cuttings. It is very important to maintain humidity after cuttings in summer, and the air humidity should be maintained above 70%. Generally, 30-50 days after cuttings can form calluses, at which time 0.1-0.2% of the aqueous urea solution and run everything water-soluble fertilizer 800 times can be spray topdressed. When the root system germinates, it is necessary to gradually control the watering to avoid the water rotting the roots.
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Prevention and control of diseases at the seedling stage:
1. Gray mold disease
Gray mold is one of the diseases of the cedar seedling stage, mainly harming the young shoots and the two annual twigs. It often causes three types of young shoots: dead shoots, ulcers, and branch wilts. It can be sprayed with compound gray mold and pyridoxine with fungicide.
2. Leaf blight
Generally, the harm begins from March to April, and the onset gradually worsens after May. The humidity is large, which is conducive to the occurrence of diseases. It can be used in phenoxymethanazole, pyrazole ether ester, methylthioxin, mesophyticin and so on.
3. Pine aphid
Pine aphid is one of the common pests of cedar, mainly in the branches of the hazard, aphid color is very similar to the pine bark night color, difficult to find. Spray control can be carried out with imidacloprid, pyridone and acetamiprid.
Transplanting and maintenance technology for large-size cedars
1. Topography before planting
In the construction site, because during the construction process, the soil of the construction site may be crushed back and forth by the construction machinery, resulting in the phenomenon that the soil is hard, so before the cedar is planted, the soil of the engineering site should be deeply turned, and the depth of the deep turning should be more than 50 centimeters, and when operating, the construction machinery should carry out construction operations in a retrogressive manner to ensure that the soil to be ploughed is no longer crushed and achieve a loose and breathable effect.
2. Dig a tree burrow
When digging a tree burrow, it is best to dig as large as possible, and it is best to mix some perlite and grass charcoal soil when the bottom of the tree pit is backfilled, which can increase the root speed and root amount of cedar in the later stage and shorten the recovery period. The size of the tree burrow can be determined according to the size of the soil ball of the cedar to be planted. In general, the depth of the general tree burrow is 5-10 cm higher than the upper edge of the earth ball, and the diameter of the tree burrow is generally 50-60 cm larger than the diameter of the earth ball.
3. Start digging
When cedar is digging, it must be dug with soil balls, and trees without soil balls have a very low survival rate.
4. Hoisting
In the process of cedar loading and unloading, protective measures must be taken when lifting with cranes. Cedar bark can easily be strangled or peeled by the lifting belt and should be reinforced and protected at the location of the strap.
5. Trim
Xu Jian of Cedar is mainly thinning branches and does not shorten. For large-scale cedar pruning, it is mainly to prune dead branches, diseased branches, stumps, inner branches, overlapping branches, and pruning. When pruning, pay attention to multiple pruning, do not prune once to form, so as not to cut wrongly, another pruning is formed, which is more harmful to the tree. When pruning, it is also necessary to retain 0.5-1 cm of pruning branches to prevent excessive flow of glue.
6. Planting
(1) When planting, pay attention to the pine tree to be shallow, not deep. The upper edge of the soil ball is preferably 5-10 cm higher than the ground, and planting too deeply has a greater impact on the roots of the cedar.
(2) Backfill soil. When backfilling soil, it is best to backfill the topsoil first, if the soil is more viscous, it is necessary to backfill after sand mixing, generally 30%-40% of the sand can be mixed in, so as to facilitate the soil root permeability.
(3) After planting backfill soil, the trees should be fixed with supports in time to prevent trees from lodging when watering the fixed root water.
(4) Before the tree is put into the tree cavity, use naphthaleneacetic acid or indolebutyric acid compound with xanthoxin for root spraying and soil spraying ball treatment or tree planting backfill soil, with watering and root permeability, with rooting agent and nicox or allicin for root irrigation treatment. After planting, watering is watered three times, the first time is watered on the day after planting, the second time is generally carried out on the second or third day, and the third time is generally carried out after 5-7 days. If there is a crack in the tree cavity after watering, it is necessary to loosen the soil or sprinkle the soil in time to reduce the damage of the crack to the root system.
(5) Newly planted trees should be sprayed with water to moisturize. It is often possible to replenish water with aerosol dispensers, water pipes, erecting sprinklers, etc. However, pine trees should pay attention to the root system should not be too wet to prevent rotten roots.
(6) If the soil where cedar is planted has salinity, it should be treated with acidic substances such as ferrous sulfate, sulfur, gypsum, phosphorus gypsum, etc., and organic fertilizer is used to change the soil properties and be suitable for the growth of cedar.
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7. Post-maintenance
In the first year after the cedar is planted, conservation is very important. The control of moisture should be dry and wet, can not be short of water and water; in the short period after planting, when encountering strong light and high temperature, it is best to shade properly; when deciduous leaves and yellow leaves occur, it should be considered that the moisture is too large and the moisture is dispersed in time; when encountering new shoots for a long time, attention should be paid to whether the planting is deep or the dry base is exposed.
The above is the cultivation of cedar, planting and maintenance of the most basic maintenance technology, I hope to bring some inspiration to everyone.
