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- W2352998452 abstract "By the method of top-closed core insertion,a field experiment of nitrogen addition(20 g·m-2·a-1)was conducted in Daqinggou Ecological Station in 2006 to investigate the seasonal dynamics of soil nitrogen mineralization and available nitrogen in a sandy grassland of southeastern Keerqin sandy land.The results showed that nitrogen addition increased significantly the contents of soil ammonium nitrogen,nitrate nitrogen,and inorganic nitrogen from June 1 to October 15,and the rates of net nitrogen mineralization and nitrification from September 1 to October 15.The seasonal fluctuation of soil available nitrogen was increased,with the ranges of 1.29-11.60 mg·kg-1·30 d-1 in net nitrogen mineralization rate,-4.15-11.20 mg·kg-1·30 d-1 in nitrification rate,and 6.49-20.66 mg·kg-1 in inorganic nitrogen content.The net nitrogen mineralization and nitrification rates increased but ammonium nitrogen content decreased with time,while nitrate nitrogen and inorganic nitrogen contents varied in V shape,with the lowest contents observed on July 15,the peak time of biomass production.It was concluded that the soil nitrogen availability in test sandy grassland was lower,and nitrogen addition could significantly increase the capability of its soil nitrogen supply." @default.
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- W2352998452 date "2007-01-01" @default.
- W2352998452 modified "2023-09-23" @default.
- W2352998452 title "Effects of nitrogen addition on soil nitrogen availability in sandy grassland" @default.
- W2352998452 hasPublicationYear "2007" @default.
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