Nematode communities in continuous tomato-cropping field soil infested by root-knot nematodes

文献类型: 外文期刊

第一作者: Shi, L. B.

作者: Shi, L. B.;Wu, H. Y.;Zheng, G. D.;Peng, D. L.

作者机构:

关键词: Continuous cropping;diversity;root-knot nematode;soil nematode;trophic groups

期刊名称:ACTA AGRICULTURAE SCANDINAVICA SECTION B-SOIL AND PLANT SCIENCE ( 影响因子:1.694; 五年影响因子:1.568 )

ISSN: 0906-4710

年卷期: 2012 年 62 卷 3 期

页码:

收录情况: SCI

摘要: Soil nematode communities in greenhouses with different duration of continuous cropping were investigated from October 2007 to June 2008. Total nematode populations and trophic groups were observed. Fourteen families and 24 genera were identified; the genera Protorhabditis, Diploscapter, Meloidogyne and Helicotylenchus comprised 74.4% of the total population (from all tested samples). Plant-parasitic and bacterivorous nematodes were most abundant among the trophic groups. Populations of both trophic groups increased with increasing times of continuous cropping. The numbers of soil nematodes at different soil depths were significantly different (p < 0.05). Shannon-Wiener index (H') and Simpson index of diversity (D) were highest in 0-yr soil of all soils. Plant parasite index (PPI) and PPI/MI (maturity index) of soil nematodes increased with the increasing times of continuous cropping suggesting that continuous cropping resulted in gradual shift of plant-parasitic nematodes from k-strategists to r-strategists.

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