Cultivation techniques of Metasequoia glyptostroboides

Metasequoia glyptostroboides (Metasequoiaglyptostroboides), alias Metasequoia glyptostroboides, Taxodiaceae.

I. Overview:

Is an ancient and rare tree species, known as "living fossils", for the national key protection of plants. In 1941, Chinese botanists first discovered it in Wanxian, Sichuan and Lichuan, Hubei, which caused a shock in the botanical circle of the world.

Second, ecological characteristics:

It originated in China. Like a warm, humid and sunny environment. Strong adaptability, cold tolerance, shade tolerance, moisture tolerance, drought and barren. The suitable growth temperature is 15-20 ℃. It can withstand low temperature of-30 ℃ in winter and high temperature of 46 ℃ in summer. The soil is suitable for slightly acidic sandy loam with deep soil layer, fertile soil and good drainage, and is more tolerant to saline-alkali soil.

3. Reproductive skills:

1. Sowing: the 30-year-old plant can bear fruit, and the 40-year-old 60-year-old plant enters the fruiting and flourishing stage. It is suitable for spring sowing in March, the optimum temperature for germination is 12-20 ℃, and germinate 10-15 days after sowing, and the germination rate is 8%-10%. The height of seedlings in that year can reach more than 40 centimeters.

2. Cuttings: hardwood and softwood cuttings are commonly used. It is best to cut 1-year-old full shoots as cuttings on 1-5-year-old seedlings, and the survival rate is the highest. Hardwood cuttings were carried out from February to March, cut after defoliation, tied up and stored in sand to survive the winter, inserted into the seedbed in the following spring, sprayed and moisturized, and rooting in 30-40 days. The softwood cuttings were carried out from May to June, and the semi-lignified branches were selected, which were 12-15 cm long and took root 20-25 days after cuttage.

4. Main points of cultivation:

When transplanting seedlings, young seedlings should take more soil, and big seedlings should bring soil balls. Basic fertilizer should be applied before planting and water should be watered thoroughly after planting. Keep the soil moist during the growing period. Two years after planting, fertilization was applied once before sprouting in spring, once in early summer and once in autumn. Trim properly at the seedling stage and straighten it with fine bamboo.

5. Disease and pest control:

It mainly has the harm of Rhizoctonia solani and dry rot, which can be sprayed with 1000 times of agricultural streptomycin powder. The pest is harmful to Plutella xylostella and white nematode, which can be sprayed with 0.5% avermectin EC 1500 times.