The species, quantity and diversity of Mermithidae in the paddyfield of Yulin City and the pattern of vertical and horizontal distribution were investigated and analysed.

• 摘要采用随机抽样、分层挖坑剥土法及采用直线跳跃取样法、5点取样法，对玉林市稻田索科线虫的种类、数量、水平频次分布类型、属间多样性等进行了调查和分析。