RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2009, Vol. 18 >> Issue (11): 1063-.

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EXPERIMENTAL STUDY ON NITROGEN TRANSPORT AND TRANSFORMATION OF CONTROLLED DRAINAGE

  

  1. (State Key Laboratory of Water Recources and Hydropower Engineering Science| Wuhan Universty| Wuhan 430072| China)
  • Online:2009-11-20

Abstract:

A field experimental project was carried out in Jingzhou City，Hubei Province to assess the effects of controlled drainage on the distribution and the content of nitrogen in the soil.The study has draw conclusions as following：1)The controlled drainage system had a remarkable effect on the diminishing ratios of nitrate nitrogen between neighboring layers.It was presented that the diminishing ratio increased with the raising height of drain outlet.Controlled drainage system also reduced the transference of nitrate nitrogen in topsoil.2)Different from nitrate nitrogen，the content of ammonium nitrogen was stable，the effect of controlled drainage system on it was not obvious，it was indicated that the content of ammonium nitrogen decreased according to the lowering of controlling height of drain outlet.

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