The paper studied the change of NH4+-N recovery rate under different conditions,the effect of soil type,vegetation type,the model of fertilization and organic material on NH4+-N recovery rate.【Method】 In the experiment,the typical soils collected from north to south on loess plateau were chosen as the material,and the Bremner method was conducted.【Result】 The results showed that soil type,vegetation type,and organic material had remarkable influence on NH4+-N recovery rate(P<0.01).Averagely,t...
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