1 Low temperature resistance: Achieves -35°C low temperature record in the original distribution area. In our country, it is able to tolerate -25°C low temperature, and it can adapt to the growth of the vast areas south of Beijing (at 40 latitudes) in China. The Susu-1 is also the same. The extremely low annual temperature of the Mexican Larch is above 0°C and is a tree species that is not tolerant of low temperatures. However, after introducing China, a century-old tree in Nanjing has also undergone a test of extremely low temperatures of -19°C. It is estimated that growth is possible in the south of the Yangtze River in China, but this has not yet been tested in large areas, and introduction in the northern region should first be planted in a small area. The cold-tolerance of the Chinese fir is better than that of Mexican dropwood, and it is considered to promote cultivation in the area south of the Huaihe River. 2 Water flooding: As the sedges and the cedarwoods grow in the marshes, the longest half of the year is inundated with water at the base of the trunk. Therefore, it is extremely resistant to flooding. After the introduction in China, a major flood disaster occurred in Jiangsu in 1991. In the depth of 0.5 to 2.1 meters, the Taxodium chinensis and Taxodium did not die after being flooded for 15 to 30 days. Normal growth occurred after the water receded, and most other tree species died or became extremely severe. damage. In the 20 years of life in Hubei, large trees are submerged in water for several months; in 13 years, trees are flooded for 4 months from June to September; 3 years old trees are flooded for 6 months and can grow normally after water recedes. The Susong No. 1 is resistant to flooding, such as falling bass. Mexican dropwood and Zhongshan Shan are not able to tolerate flooding. 3 Resistant to Drought and Infertility: Taxodium species are also highly resistant to drought and barrenness. Nanjing encountered a drought in 1978, and almost no rain for 00 days. Under conditions of artificial drought-resistant watering, the mortality of Metasequoia and Chinese fir was still as high as 30%. However, it was still unsuitable for drought and waterlogging. dead. Lizao Forest Farm in Donghai County, Jiangsu Province was planted on a thin gneiss mountain. It was dry and rainless for three consecutive years from 1994 to 1996. The longest no rain day was more than 100 days. Su Suichi was born at 6 years old. The height of the tree is 5.4 meters and the diameter at breast height is 9.9 centimeters, which is 34% greater than that of the fine tree species, Loblolly pine, which is the most resistant to drought. 4 Wind resistance: The species of the genus Taxodium is a deep-rooted tree species, with long, thick main roots and numerous fine roots. The roots of young trees 1.5 to 2.0 meters tall have a depth of 1.2 to 1.3 meters and a root width of 0.8 to 1.0 meters. The roots have strong penetrating power and can penetrate tight sand layers, hard disk layers, and stone seams. They have strong wind resistance. In the summer typhoon disasters in the provinces (regions) of Jiangsu, Zhejiang, Guizhou, Guangxi, and Guangdong, there were M. edulis, Cypresses, Farnesia, and poplars that had been blown down and broken at wind levels above 7 but they were never found. Chisan and Mexican Larch were affected by typhoon. On August 2, 1999, Tornadoes in Nanjing's southern suburbs reached Grade 8 and above. After the wind investigation, there were many Metasequoia, Cypress, pine, poplar, cedar, Fawton, and wind-breaking, and none of the species was found damaged. 5 Anti-pollution: In the United States, some people observed the effect of industrial smoke on the growth of forest trees. It was found that the species of the genus Taxodium can endure smoke and dust pollution and grow in the smoke without causing mildew. Some of the deciduous cedar forests are exposed to urban effluents, and they can grow normally when the soil contains high levels of salt. When the sewage contains some harmful substances, the water temperature is higher than 32 ~ 42 °C, and the growth of the tree's high and low diameters is not only not affected, but also has a certain increase. Droplet seeds can also germinate normally and grow into small seedlings and trees. 6 Resistance to diseases and insect pests: There are few serious diseases and insect pests in the original growing areas and in the introduced regions of China. In the original growing areas, pests such as the ball fly, cone borer, etc., which mainly attacked the cones, were reported to be harmful to the pests. At the same time, its wood is aromatic, resistant to decay, and has a strong resistance to termites. Other Class,Other Herbs,Something Else,Additional Herbs Henan Qiancuntang medicial technology co.ltd. , https://www.qctchineseherb.com