南方根结线虫初始接种密度对生姜生长的影响

在盆栽条件下,研究了南方根结线虫不同初始接种密度对生姜生长的影响.结果表明,南方根结线虫的侵染,降低生姜株高、茎粗、分枝数、茎叶鲜重和根系鲜重,最终降低生姜的产量,且随着接种密度的增加,生姜生长所受到的危害也随之增加.每100 g干土接种0、100和200个卵,可使生姜分别减产27.91%、37.73%和42.14%.初始接种密度对南方根结线虫繁殖速率也有很大影响.一般初始接种密度低时繁殖速率高,接种密度高时繁殖速率低,其在生姜上的平衡密度为每100 g干土746.20个.

Effects of Meloidogyne incognita initial inoculation density on ginger growth

The study with potted ginger showed that Meloidogyne incognita infection could reduce the plant height,stem diameter,quantity of shoots,and fresh weight of stem,leaf and root,and finally,reduce ginger yield.With the enhancement of M.incognita initial inoculation density,the growth of ginger was damaged more severely,e.g.,under inoculating 50,100 and 200 M.incognita eggs per 100 g soil,ginger yield decreased by 27.91%,37.73% and 42.14%,respectively.The reproduction rate of M.incognita was also affected by the initial inoculation density,the lower the initial inoculation density,the higher the reproduction rate.When the inoculation density reached 746.20 eggs per 100 g soil,the reproduction rate was 1.