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Soils Nitrogen Mineralization Processes under Continuously Waterlogged Incubation Conditions

Li Shengxiu Ai Shaoying He Hua (Department of Resources and Environmental Science,Northwestern Agricultural University,Yangling,Shaanxi 712100)  
Under continuously waterlogged incubation conditions,soil samples were taken for determination of mineralized N at an interval time without leaching during the incubated period to study the mineralization processes of soils organic N.The results showed that as compared with the mineralized N by intermittent leaching,the N mineralization processes of this procedure were much slow,and the cumulatively mineralized N became less and decreased obviously when reached a certain extent.However,the continuously waterlogged incubation played the same function as the intermittent leaching procedure in reflection of soils mineralized N level,mineralization degree and rate of different organic matter added to soils with different fertilities.In addition,the mineralized N amounts during 32 days incubation by the two procedures were linearly related closely.
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