水杉的成材年限,不同立地条件各不相同、原产地一般需要20—30年,全国各地引种栽培后,短期培育中、大径材未见报导。但据《中国主要造林树种技术》介绍,南京、湖北等地“在一般栽培的条件下,水杉可以在15—20年左右达到成材”。缩短成材时间,增加轮伐次数,提高单位面积产材量,无疑会对满足社会的需要,缓和供求矛盾,产生积极作用。为此,从 Metasequoia’s life expectancy, different site conditions vary, the origin usually takes 20-30 years after the introduction of cultivation throughout the country, short-term cultivation, large diameter wood has not been reported. However, according to “China’s major afforestation tree technology” introduction, Nanjing, Hubei and other places “under the conditions of general cultivation, Metasequoia can be achieved in 15-20 years or so.” Shortening the time for stocking, increasing the number of rotations and raising the production volume per unit area undoubtedly will have a positive effect on meeting the needs of society and alleviating the contradiction between supply and demand. To this end, from