Introduction of gold leaf metasequoia
Metasequoia sinensis is a genetically superior change that occurs in the long-term cultivation process of common metasequoia. It is artificially screened and finally cultivated. Genes mutate in the genetic process, with subtle changes and superior changes. Deterioration is harmful and eventually eliminated; superiority is beneficial and ultimately used. In the breeding of improved varieties, we have occasionally appeared, beneficial, and can be used for excellent variability, layer screening, generational breeding; promoting benign or beneficial characteristics, and multi-generational genetic stability This is the basic content of genetic breeding.
Metasequoia originated in China and was introduced to Japan and Korea. In the long-term cultivation process, the final selection [growth speed, tree shape, adaptation habit] is consistent with ordinary metasequoia; leaves, wood, bark [color and wood firmness] are different from ordinary metasequoia Metasequoia, which was “returned†to China in 2003, is now widely planted in Sichuan, Jiangsu, Zhejiang, Guangdong, Fujian, Shandong and other provinces.
The gold leaf metasequoia is a deciduous tree of the genus Sequoia. The leaf color is long-term yellow, the tree is end-shaped, cold-resistant and heat-resistant, and the growth rate is fast. The introduction and cultivation experiments in various places show that in areas with poor ridges, no tall buildings and trees, the color is still yellow and the color of the leaves is more prominent. In humid, rainy, hot and humid areas, the growth rate is fast. The yellowish leaves are wider. The suitable range from north to Hebei, Tianjin, South and Guangdong, east to Jiangsu and Zhejiang, and west to Sichuan can all grow normally in open land without any protection measures; it is approved as a good tree species in Jiangsu Province; The golden leaf cedar trees cultivated for 3 to 5 years and with a breast diameter of 8 cm or more are widely used in urban landscape and landscape garden construction projects.
Introduction and cultivation of Metasequoia
Through the practice of introduction and cultivation of Metasequoia spp. in the past few years in the country, we have learned that the following aspects should be noted in the introduction and cultivation of Metasequoia:
At present, Jinshui Metasequoia has been introduced and cultivated in Dandong, Hebei, Tianjin, Beijing, Shandong, Shanxi, Shaanxi, Gansu, Hubei, Hunan, Anhui, Jiangxi, Jiangsu, Zhejiang, Fujian, Yunnan, Guizhou, Guangxi, Guangdong and other provinces. It can grow normally and the color of the colored leaves is stable. As long as the ordinary metasequoia trees can grow normally in the area, the gold leaf metasequoia can be routinely planted.
For the introduction of gold leaf metasequoia, regular seedling production units such as production licenses and plant quarantine should be selected. At present, the seedlings of the gold leaf metasequoia are mainly in the form of seedlings and spikes. The saplings are mainly planted with annual grafts; the stalks are dominated by 1-2 years of lignified and thick 3-8mm buds. Annual grafting seedlings, specifications 30 seedlings (about 30cm height) 50 seedlings (about 50cm height) 80 seedlings (about 80cm height) 1 meter seedlings (height 90cm to 1.2 meters) and other specifications. The cuttings are measured in inches or in kilograms of effective branches. The annual marrying seedlings range in price from 8 to 30 yuan per plant; the price of cuttings is 1.5 to 2 yuan per inch or 1,500 to 2,000 yuan per kilogram. For the first time to purchase the test, it is advisable to choose an annual grafted seedling with a height of 50-80cm. After the trial, after having certain planting management experience, it is determined that the batch planting is relatively small and the management requirements are relatively high. It is advisable to plant annual grafts of 30~50cm; for professional nurseries or units with production technology ability, we can also prepare and plant the traditional waterfowl rootstocks in advance. In the spring of 2-3 months, we will directly purchase the scion and graft it by ourselves. Traditional.
The transplanting of the gold leaf cedar seedlings varies slightly from country to country depending on the climate, but it is generally best after the Mid-Autumn Festival of the Lunar New Year and before April of the following year; the transplanting of container seedlings can be carried out all year round. The introduction of gold leaf metasequoia should be prepared in advance, including land, water, planting labor, and watching weather conditions; if there is the best season, the most suitable weather, and scientific management, the survival rate of introduction is over 98%. .
The golden leaf genus is a new and famous colorful leaf tree species; its name is in its leaves and canopy, and it is cherished in its cherished varieties. The person in charge of the colorful horticultural company park told us that the cultivation and breeding process of the gold leaf metasequoia is roughly divided into four stages: seedling expansion, youth tree cultivation, engineering tree emergence, and garden construction. In order to facilitate the circulation of improved seeds and improve the survival rate of seedling transplanting, the company's gold leaf cedar seedlings are all planted in a container of 21 x 21 cm in diameter. After being purchased from various places, the container bag can be removed. Planted directly in the soil, it is conducive to the development of young trees. After 3-5 years of youth tree cultivation, large trees with a garden landscape of 8 to 10 cm in diameter and 6 meters in height can be formed. At this time, according to the annual demand for sputum, 1 year in advance, transplanted into the root container; Years can form engineering tree container seedlings; it is conducive to transplanting the whole crown and quickly forming a scene in a short time.
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Fucheng Metals Production Co., Ltd. of Jiangmen City , https://www.fcmp.com