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盐类对南方根结线虫迁移能力和侵入能力的影响

, PP. 639-644

Keywords: 南方根结线虫,无机盐,有机盐,迁移能力,侵入能力

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Abstract:

为探讨无机盐和有机盐对南方根结线虫的作用方式,在室内利用沙柱法和染色法测定了二者对南方根结线虫2龄幼虫迁移能力及侵入番茄根部能力的影响。结果表明,随着各盐处理浓度的增加,南方根结线虫2龄幼虫的迁移能力和侵入能力显著降低。在4μg/mLKSCN、C6H8O7、KCl、KH2PO4、KHCO3和MnSO4·H2O沙柱中,15d后2龄幼虫的平均迁移距离最小,分别为0、0.33、0.52、0.53、0.55和0.58cm,而对照为0.94cm。2龄幼虫在BaNO3、K2HPO4、KHCO3、CsCl和KSCN各浓度沙柱中的平均迁移距离均小于0.94cm。2μg/mLNH4NO3、KH2PO4、(NH4)2CO3、CsCl、(NH4)2SO4、NaSCN和NH4SCN处理15d后,2龄幼虫对番茄根部的侵入率最低,分别为1%、2.33%、1.33%、2%、2%、1%和1.67%。表明对2龄幼虫侵入番茄根部抑制效果最明显的盐为NH4NO3、KH2PO4、(NH4)2CO3、CsCl、(NH4)2SO4、NaSCN和NH4SCN。

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