A new excellent leaf tree-Metasequoia glyptostroboides
Metasequoia glyptostroboides (Metasequoiaglyptostroboides) is the only remaining species of Taxodiaceae and Metasequoia. The species was once thought to be extinct until it was discovered in Lichuan, Hubei Province in 1941, and then it was also found in Wanxian County, Sichuan Province. In 1947, the seeds of Metasequoia glyptostroboides were introduced to Arnold Tree Garden in the United States, and from there they spread to botanical gardens around the world. Metasequoia glyptostroboides (Metasequoia glyptostroboides) and its scientific name were officially named in 1948, and have been famous in China and the world ever since.
Metasequoia glyptostroboidesGoldRush' is a cultivated variety of Metasequoia glyptostroboides developed in recent years. Deciduous trees, fast-growing, sexually strong, reddish-brown bark; leaves flat, linear, opposite in 2 rows on short branches; new leaves are golden in spring, summer and autumn of the year.
Metasequoia glyptostroboides are mostly introduced from Japan, which have strict requirements for microclimate, high requirements for air humidity, and like water and wet climate. At present, it has been introduced in Beijing, Jiangsu, Shanghai, Zhejiang and other places. The experiment shows that the introduction performance is poor in some areas of Beijing, while the Metasequoia glyptostroboides introduced in Shanghai, Jiangsu and Zhejiang has strong adaptability, fast growth, straight trunk and beautiful tree shape. the leaf color is stable, and the three-year-old seedlings can reach more than 3 meters high. Multi-use cutting propagation can be carried out in four seasons, and the survival rate is higher.
Metasequoia glyptostroboides is resistant to water and moisture, and it is an excellent greening tree species in plain and lake area, but as a colored leaf tree species, it has a broad development prospect in East China.
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Picea schrenkiana
Snow Ridge Spruce: Pine Spruce evergreen trees, up to 30 meters to 40 meters high, crown cylindrical or spire-shaped, graceful posture. Xueling spruce is cold-resistant, moisture-resistant and shade-resistant. It is a rare evergreen tree species in Tibet and should be vigorously promoted.
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Seedling raising technique of Tianshan spruce
The main results are as follows: 1. Loam and sandy loam with better drainage and irrigation conditions should be selected for cultivating spruce seedlings. Spruce seeds are small, only by intensive cultivation can we improve the sprouting rate of seedlings and cultivate high-quality strong seedlings. The soil was ploughed deeply in autumn, with a depth of 250.30 cm, and 3 tons of base fertilizer was applied every 667m2. Combined with soil preparation for soil disinfection, 0.1% carbendazim or methyl thiophanate solution was sprayed with 1 kg solution for every 667 square meters. Make the bed with fine rake in spring, strive to break the soil finely, and irrigate the bottom water 3 days before sowing. II. Species
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