泥鳅对水田上覆水中氮素动态的生物扰动效应

doi:CNKI:SUN:NCST.0.2009-02-009

Abstract

Abstract: Bioturbation effect of benthic fish,e.g.Misgurnus anguillicaudatus,on nitrogen dynamic in paddy field surface water and its mechanism was investigated through a simulation experiment analyzing comparatively nitrogen contents in waters with and without Misgurnus anguillicaudatus.Misgurnus anguillicaudatus showed strong bioturbation effect.Throughout the experiment,NH⁺₄-N and NO^-₃-N concentrations remained higher in the bioturbation group than in the control group,while NO^-₂-N concentration did not show any obvious rules.In the early stage of the experiment NH⁺₄-N/TN ratio was higher in the bioturbation group than in the control group,while in the middle and late stages of the experiment it turned reversely.DIN/TN ratio was markedly higher in the bioturbation group than in the control group.Misgurnus anguillicaudatus bioturbation increased remarkably DIN and TN concentrations in paddy field surface water.

Key words: Misgurnus anguillicaudatus, paddy field, bioturbation, nitrogen, surface water

CLC Number:

S917.4

SUN Gang, FANG Yan, AN Yong-Hui, YANG Xiao-Yuan. Bioturbation Effect of Misgurnus anguillicaudatus on Nitrogen Dynamic in Surface Water of Paddy Field[J]. Journal of Ecology and Rural Environment, 2009, 25(2): 39-43.

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http://www.ere.ac.cn/EN/Y2009/V25/I2/39

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Bioturbation Effect of Misgurnus anguillicaudatus on Nitrogen Dynamic in Surface Water of Paddy Field

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