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本文针对科尔沁沙地黑沙蒿人工植被土壤线虫的总数、群落组成、营养类群进行了研究。结果表明,随着黑沙蒿种植年限的增加,土壤线虫数量显著增加。不同年限黑沙蒿植被之间土壤线虫总数差异显著(P<0.01)。在本研究中共获得线虫13科19属,其中Acrobeles为优势属。在半流动沙丘生态系统中,植物寄生线虫为优势营养类群;而在黑沙蒿人工植被生态系统中,线虫群落逐渐向以食细菌线虫占优势的方向演替。本实验结果表明,土壤线虫群落结构对退化沙漠生态系统的恢复阶段具有很好的生物指示作用。
In this paper, the total number of soil nematodes, community composition and nutrition groups of artificial Artemisia lanceolata vegetation in Horqin sandy land were studied. The results showed that the number of soil nematodes increased significantly with the increase of planting age of Artemisia lanceolata. The total number of soil nematodes in different years of Artemisia annua was significantly different (P <0.01). In this study, 13 families and 13 genera of nematodes were obtained, among which Acrobeles was the dominant genus. In semi-mobile sand dune ecosystems, plant parasitic nematodes are predominant nutrition groups, whereas in Artemisia lanceolata artificial vegetation ecosystem, the nematode community gradually migrates to dominate the bacterial-feeding nematode. The results of this experiment show that the soil nematode community structure has a good biological indication for the restoration of degraded desert ecosystems.