There are many kinds of Chinese fir, which can be roughly divided into three categories: one is Taxodium ascendens, also known as Taxodium ascendens and Hemlock, whose shoots and new leaves are yellow-green and shiny; The other is gray fir with blue-green leaves and dull leaves, also known as brown fir, mountain fir and soaking fir; There is also a kind of Chinese fir with thin and soft leaves and drooping branches, which is also called soft-leaved fir. It is called "all-round wood".
Characteristics of Taxodium distichum
The propagation of Taxodium distichum is mainly sowing, and seed treatment is the first step. After obtaining the net seeds of February 65438-1October 65438 of the following year, immediately put the seeds in the wet sand layer, put them in the cold storage or refrigerator at 5℃, or mix them with wet sand (the ratio of sand to seeds is about 8: 1), put them in plastic bags, and put them in the cellar or outdoor shade.
Regularly check whether the sand is dehydrated and dry. If it is dry (the sand is white), water it to keep it moist. After about 80 days, the seeds can absorb enough water. Then it is ideal to sow in the second spring from late March to early April. In that year, the seedling height can reach 0.8m- 1.0m, and the ground diameter can reach about 1.0cm, which can meet the needs of afforestation and cultivation of large seedlings in the coming spring.
Its seed shell is hard, not easy to absorb water, and contains inhibitory substances, so germination is slow and lasts for a long time, sometimes up to more than 80 days. If you sow in spring, it will not emerge until summer, which will seriously affect the growth of seedlings. Therefore, the seeds were collected in autumn and winter, and after being treated to get clean seeds, wet sand stratification was carried out in June+February, 5438, and the seeds were sown after 90 days of germination.
When planting Taxodium ascendens, the fertile and moist slightly acidic sandy loam was selected as the border, the row spacing was 20cm, and the sowing amount per mu was 8- 10kg. Conventional management after sowing, when the annual seedling is as high as 60-80 cm, it can be planted in the nursery.