Management and propagation techniques of Metasequoia glyptostroboides
Metasequoia glyptostroboides is suitable for warm and humid climate, cool summer, snow but not cold winter, annual average temperature 13 ℃, extreme lowest temperature-8 ℃, extreme highest temperature 35.4 ℃, frost-free period 230 days; annual precipitation 1500 mm, annual average relative humidity 82%. The soil is acid mountain yellow soil, purple soil or alluvial soil, and the pH value is 4.5 Murray 5.5. Most of them are born in places with gentle terrain, deep soil layer, moist or slightly stagnant water near valleys or foothills, with strong cold resistance and water and moisture resistance. they can grow into light-loving tree species in light saline-alkali land, and their roots are well developed. the speed of growth is often dominated by soil moisture, and grows slowly in places with long-term stagnant water and poor drainage, and the base of the trunk is usually inflated and longitudinally angled.
Metasequoia glyptostroboides is generally propagated by sowing and cutting. Metasequoia glyptostroboides generally enters the seed-setting peak at the age of 40-60 years old, sows in late March, and germinates and emerges half a month after sowing. Hardwood and tender wood cuttings are also widely used to cut 1-year-old healthy branches from 5-year-old seedlings as cuttings with high survival rate. Hardwood cuttings are carried out in early spring, cuttings should be cut immediately after defoliation, bundled into bundles, stored in sand for winter, cut after warming, and watered immediately after cutting to keep the bed moist. In the period of sprouting and leaf expansion, we should water frequently and build a shade shed. The softwood cuttings were cut in the first and middle of June, and the semi-lignified twigs about 12~15cm were selected, and the top 2-4 leaves were left, and inserted into the soil 4~6cm. After planting, water should be sprinkled frequently, shading should be strict, and rooting would take place after 20-25 days. The seedling was as high as 25~30cm in that year. In the seedling stage, we should pay attention to setting up a shed for shade, often watering and fertilizing properly.
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What are the characteristics of metasequoia species?
The tree species of Metasequoia glyptostroboides are characterized by deciduous trees of Taxodiaceae. It can reach more than 35 meters in height and 2.5 meters in breast diameter. At the end of the trunk, the base is often inflated and the crown is conical. It is a precious tree species endemic to China. It belongs to ancient relict plants. Metasequoia glyptostroboides is adaptable, but likes warm and humid climate, deep, fertile and moist soil. Drought, barren, low temperature and saline-alkali are not conducive to the growth of metasequoia. Metasequoia wood has straight texture, light and soft material, small difference in shrinkage, and easy to process. Suitable for construction, furniture, agricultural tools, ships and other materials, can also be used as raw materials for papermaking. With
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What is the symptom of metasequoia red blight?
The symptom of red blight of Metasequoia glyptostroboides is that the disease usually starts from the lower branches and leaves of Metasequoia glyptostroboides, gradually develops and spreads upward, and finally leads to the death of the whole plant. The susceptible branches and leaves produce brown spots at the beginning, then expand into dark brown, and then the branchlets and withered branches turn brown and die. The disease can also spread to green branchlets, forming sunken brown ulcer spots that surround the main stem and cause the upper part to die; or do not surround the main stem, but cannot heal for a long time, with the growth of the main stem, the ulcer sinks deeply into the trunk, forming trench rot, and the young tree base cadres produce irregular grooves and become deformed. Under moist conditions, disease spots
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