| Three kinds of ammonium nitrogen fertilizer on nitrification and model analysis |
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| DOI：10.7606/j.issn.1000-7601.2007.06.35 |
| Key Words: anion rate of nitrification model of nitrification |
| Author Name | Affiliation | | ZHANG Guo-zhen | College of Resources and Environment Northwest A＆F University,Yangling,Shaanxi 712100,China；Yangling Vocational ＆ Technical College,Yangling,Shaanxi 712100,China | | LI Shi-qing | College of Resources and Environment Northwest A＆F University,Yangling,Shaanxi 712100,China；State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau Northwest A＆F University,Yangling,Shaanxi 712100,China |
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| Abstract: |
| Fresh Cal-Ustic Isohumasols is used for indoor fostering in this experiment.In the same fatty soil condition, study is made on the influence of different kinds of nitrogen fertilizer to the nitrification of pH and Nmin.And kinetic model of nitrification is established.The results of the experiment and imitation show that: ① The velocity of the loss of ammonium nitrogen and the accumulation of nitric nitrogen is like a parabolic flight.The rate of the ammonium nitrogen loss is higher than the accumulation of nitric nitrogen.The original rate of the ammonium nitrogen loss is also higher than the accumulation of nitric nitrogen.② The loss of ammonium nitrogen and the accumulation of nitric nitrogen of the ammonium chloride remain in a low rate of in the first stage (about one week) .They rise as high as the rate of ammonium sulfate after the first stage.The chloride can restrain the loss of ammonium nitrogen.③ The constant volume of maximal rate of the nitric nitrogen accumulation (5.8～8.8 mg/ (kg·d) ) has nothing to do with the type of fertilizer, while the constant maximal rate of the loss of ammonium nitrogen is possibly affected by the fertilizer's characters and the soil's bio-characters. |
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