%0 Journal Article
%T ModifiedConwayMethodforsoilavailablenitrogentesting
%A 于增寿
%A 黄德明
%J 华北农学报
%P 106-109
%D 1993
%R 10.7668/hbnxb.1993.S2.019
%X TheidealreducingreagentintestingavailablenitrogenofsoilbyConwayMethodisDevard'salloy.Theoptimumratioofsoil:Devard'salloy:1.0NNaOHsolutionis5.0g:0.2g:5ml.Whenreactiongoesonat30℃for4hours,therateofsoilNO3-Nreductionisabout90%,andtherecoveryrateofsoilNH4-Nisabout95%.Someorganicnitrogencanbemeasuredatthesametime.ThismethodisdefinedastheModifiedConwayMethodandthesoilN-minisr=0.982（n=10）.Inpredictingsoilnitrogensupplyingpower,theModifiedConwayMethodtakesonly1/6oftimeneededbyConwayMethod.TheModifiedConwayMethodcanalsobeusedforthemeasureofsoilN-min.
%K soil
%K availablenitrogen
%K ConwayMethod
%K Devard'salloy
%K reaction
%U http://www.hbnxb.net/CN/abstract/abstract6468.shtml