杉木无性系造林对比试验及重复力估测

引进浙江省12个杉木无性系扦插苗在Ⅱ、Ⅲ类立地的不同坡位上与福建省大田桃源国有林场初级种子园实生苗进行造林对比试验.结果表明,20 a生时12个无性系间在树高、胸径、冠幅、单株平均材积生长上均存在极显著差异,枝下高因造林密度原因差异不显著;不同坡位造林对无性系的影响,除冠幅显著外,其它各生长性状均极显著;与实生苗对比,适宜本地发展的杉木无性系首选57号、28号,其次为38号、A1、110号,可作为建立采穗圃的优良种源.无性系各生长性状重复力测算结果表明,20 a生时各无性系与原株之间的遗传特性保持极高的稳定性.

Comparison Test and Repeatability Estimates on Cunninghamia lanceolata Clones Afforestation

Comparison test of afforestation between the 12 Cunninghamia lanceolata clones of cuttings seedlings introduced from Zhejiang Province and primary seed planting seedlings from Taoyuan State Farm on different slope position in woodland Ⅱ、Ⅲ were conducted.The results showed that,20 years old of 12 clones were different significantly In the tree height,DBH,crown width,plant average volume growth,but under branch the difference of height was not significant for planting density;the other growth traits were significant at different slope afforestation,except to crown width;and seedling contrast,suitable for local development of the Cunninghamia lanceolata clones preferred N57,N28,followed by N38,NA1,N110,could be used as optimal provenance to establish cutting orchard.The results about repeatability of growth traits on clones showed that 20 years old of the clones and the original strains remain the highest stability of genetic characteristics.