科尔沁沙地黑沙蒿人工植被土壤线虫群落特征

Soil Nematode Community in Herqin Sandy Land with Artificial Vegetation of Artemisia Ordosica Krasch

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。

The total number, community composition and trophic groups of soil nematodes in Kerqin Sandy Land with artificial vegetation of Artemisia ordosica Krasch. were studied. The results showed that the number of soil nematode increased with the increase of plantation ages of Artemisia ordosica Krasch.. There were significant differences between the total numbers of nematodes in different plantation ages of Artemisia ordosica Krasch. （ P 〈 0.01 ）. Thirteen families and 19 genera were observed and Acrobeles was found to be the dominant genus. In the semi -mobile sandy land ecosystem, the plant parasites nematode community was the dominant group. In the artificial vegetation of Artemisia ordosica Krasch. ecosystem, nematode community of bacterivores was developed as the dominant group gradually. It was suggested that the change of nematode community composition was indicative of the restoration of the desert ecosystem.