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首页> 外文期刊>Soil Biology & Biochemistry >The effect of soil water flow and soil properties on the motility of second-stage juveniles of the root-knot nematode (Meloidogyne incognita)
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The effect of soil water flow and soil properties on the motility of second-stage juveniles of the root-knot nematode (Meloidogyne incognita)

机译：土壤水流和土壤特性对根结线虫（Meloidogyne incognita）第二阶段幼虫活力的影响

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摘要

The movement of root-knot nematode Meloidogyne incognita second-stage juveniles was investigated in a column filled with two types of fillings, andisol or sand, under a saturated condition. After incubation with or without soil water flow, the changing distribution of nematodes was monitored. As a result, we observed a tendency for different movement traits of nematodes between andisol and sand. The distance of nematodes movement in sand was always greater than that in andisol in both a percolation test and non-percolation test. In the percolation test, distance of nematodes movement in sand gradually began to increase with increasing time. We attribute this result to a gradual decrease in nematodes activity with time. Nematodes were always affected by the water flow rate, but the distance of nematodes movement did not correspond to water flow volume. We also observed that mobility of nematodes in sand were always greater than that in andisol at both percolation test and non-percolation test. These results are attributed to differences in soil structure and pore distribution of andisol and sand. This study demonstrates a difference in the movement of nematodes influenced by water flow. However, this study also presents evidence that nematodes can resist soil water flow rates that are possible in actual field conditions. Moreover, mobility of nematodes changed considerably with soil structure or pore distribution. All these may contribute to a more stable positioning of nematodes around the rhizosphere of their host plants, and therefore increase the possibility of successful parasitization.
机译：在充满饱和条件下，在装有两种类型填充物（安迪索或沙子）的圆柱中研究了根结线虫根结线虫第二阶段幼虫的运动。在有或没有土壤水流的情况下孵育后，监测线虫的变化分布。结果，我们观察到线虫在安迪索和沙子之间具有不同运动特性的趋势。在渗滤试验和非渗滤试验中，线虫在沙子中的移动距离始终大于在安迪索中。在渗滤试验中，线虫在沙中移动的距离随着时间的增加逐渐开始增加。我们将此结果归因于线虫活性随时间逐渐减少。线虫总是受水流量的影响，但是线虫运动的距离并不对应于水流量。我们还观察到，在渗滤试验和非渗滤试验中，线虫在沙子中的迁移率始终大于在安地索尔中。这些结果归因于安迪索和沙子的土壤结构和孔隙分布的差异。这项研究表明线虫的运动受到水流影响的差异。然而，这项研究也提供了证据，表明线虫可以抵抗实际田间条件下可能出现的土壤水流速度。此外，线虫的迁移率随土壤结构或孔隙分布而发生很大变化。所有这些可能有助于线虫在其寄主植物的根际周围更稳定的定位，因此增加了成功进行寄生的可能性。

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