不同种源杉木幼苗早期造林生长状况比较分析

摘要

该文以1.5代种子实生苗、2代种子实生苗、3代种子实生苗、延平种子苗、顺昌无性系5种不同类型的杉木优良材料为研究对象,在南平延平区林地泛自然条件下进行了早期造林生长比较试验.调查分析结果表明,2代、3代种子苗的树高、地径生长在前2a略占优势;2a后,1.5代种子苗逐渐表现出优势,而顺昌无性系不论是树高、地(胸)径,还是单株材积,在参试的5种杉木材料中表现都不及其他.据此推断,延平种子苗可能更适宜南平延平区生长,其次是1.5代种子苗,但仍需继续跟踪调查.%Five different breeds of Cunninghamia lanceolata seedings including 1.5,2 and 3 generation seedling, Yanping seedlings and Shunchang clones,were used to carry out afforestation in Yanping District of Nanping City. The growth survey suggest that:in the first two years,the growth of both height and diameter of 2 and 3 generations seedlings was slightly better than the others;after two years later,seedings of 1.5 generations gradually show growing superiority;Shunchang clones perform weaker in height,diameter and individual volume than those of any other 4 breeds.In conclusion,Yanping seedlings may be more appropriate for afforestation in Yanping District of Nanping City,followed by 1.5 generations seedlings,but it still need further study to support the conclusion.