【摘要】 研究结果表明，半穿刺线虫病在福建省各杉木产区均有分布，其中顺昌、建阳、沙县、南平、政和、连江等县（市）受害较重；苗圃受害较轻。该线虫自然分布与土壤质地、坡向、林龄３ 个生态因子呈极显著相关；与立地条件、炭疽病病情指数显著相关；与土壤类型相关不显著。轻壤土与砂壤土、幼龄林与中龄林、阴坡线虫数量较多。不论生态因子如何，该线虫集中分布于０～４０ ｃｍ 土层中，但不同林龄、土壤质地、坡向对该线虫的垂直分布有显著的影响更多还原

【Abstract】 Study results indicate: Tylenchulus semipenetrans distribution in Fujian Province widely,but the damage is very serious in Shuncang,Nanping,Jianyang,and Sa County,etc. The natural distribution of the nematodes is notably related to soil texture,slope trend,tree age,etc. In light soil,sandy soil,or young growth,middle aged growth or shade slope,the nematodes has a big distribution. No matter what the ecology factors are,the most nematodes distribute in 0～40 cm depth soil. The age of Cunninghamia lanceolata has notably effect on the vertical distribution of the nematode,so has soil texture and the slope trend.更多还原