为明确水栀子地根结线虫种群数量变化规律及其对土壤微环境的影响,本研究采用淘洗-离心-漂浮法测定了水栀子地土壤中全年根结线虫2龄幼虫(J2)数量及其土壤pH值、养分含量和土壤微生物情况.结果表明,土壤中J2数量全年具有明显的波动性,1年内种群数量高峰期为3月中下旬和8月上旬,在5月下旬有一个低谷期,说明存在世代重叠现象.此外,根结线虫对土壤养分含量及可培养微生物数量的影响不大,因此,根结线虫病害的防治重点是根据其种群动态规律进行长期连续的综合治理,尤其是在提高水栀子本身抗病能力方面.%To clarify the change law of quantity of root-knot nematode and its effect on soil microenvironment, the number of the second stage juveniles (J2) of root-knot nematode in the Gardania jasminoides 'Longicarpa' plantation, soil pH, nutrient content and microbial community were determined using the elutriation-centrifugation-float method. The results showed that the population number of the J2 of root-knot nematode in soil had obvious fluctuation throughout a year. The peak period values were observed in mid-to-late March and early August. There was a trough in late May that suggested a generational overlap was exist. In addition, the effects of root-knot nematodes on soil nutrient content and the number of culturable microorganisms were not significant. Therefore, the focus of the control of root-knot nematodes diseases was to carry out long-term and continuous comprehensive control according to their population dynamics, especially in improving the disease resistance of G. jasminoides itself.
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