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选取辽河干流中下游鞍山-盘锦段为研究区域,通过对5个采样点的分析,以河岸之外未受流域影响的区域为对照,探讨河岸带落水区土壤线虫生态指数的变化。结果表明,由于受流域影响,在河岸带落水区,土壤线虫c-p(colonizer-persister)值显著低于对照区域。c-p1至c-p3的线虫占全部线虫比例的90%左右。各采样点落水区c-p1和c-p2线虫比例均高于对照区(P<0.05)。食真菌与食细菌线虫比例指数F/B(Fungivores to baterivores ratio)整体小于对照区域,表明河岸带落水区土壤食微线虫食物网更倾向于食细菌通道,线虫通路比值NCR分析(Nematode channel ratio)也说明了这种变化趋势。落水区线虫瓦斯乐斯卡指数WI(Micro-to plant-feeding nema-todes ratio)整体小于对照区域。河岸带落水区土壤线虫香农-威纳多样性指数H’(Shannon-Weiner diversity)、线虫均匀度指数J(Evenness)以及线虫丰富度指数SR(Richness)均整体小于对照区域,线虫优势度指数λ(Domi-nance)大于对照区域。土壤线虫生态指数可以作为评价河岸带土壤健康程度的重要依据。
In the middle and lower reaches of Liaohe River, Anshan-Panjin section was selected as the research area. Based on the analysis of five sampling points, the changes of ecological index of soil nematode in the riparian watershed were compared with those outside the riverbank which are not affected by the drainage area. The results showed that the soil-caterpillar nematode c-p (colonizer-persister) value was significantly lower than that in the control area due to the impact of the river basin. Nematodes c-p1 to c-p3 account for about 90% of all nematodes. The proportion of c-p1 and c-p2 nematodes in each sampling point was higher than that in the control area (P <0.05). The ratio of Fungi to Bacterial nematodes F / B (Fungivores to baterivores ratio) was less than that of the control area as a whole, which indicated that the soil microcystin food web was more likely to inoculate the bacterial pathways, nematode channel ratio (NCR) Also shows that this trend. The water-borne nematode gas-snake index WI (Micro-to plant-feeding nema-to des ratio) is smaller than the control area as a whole. Shannon-Weiner diversity, Evenness and nematode richness index (SR) of the soil nematode in the riparian watershed were all less than those of the control area, and the nematode dominance index λ Domi-nance is larger than the control area. Soil nematode ecological index can be used as an important basis for evaluating the soil health of riparian zone.