不施氮处理土壤氮素矿化量在各生育期均显著高于施氮处理；
The soil mineralized N at each tobacco growth stage was significantly higher in the control than in the N fertilization treatment.
用单因素指数模型模拟洱海流域农田土壤氮素矿化拟合度很高，效果较好。
By using one-pool model to simulate the mineralized process in soils in Erhai Lake basin, the effect was relatively good with a high goodness-of-fit.
土壤氮素矿化研究对从农田生态系统氮素平衡到全球变化和环境问题均具有重要意义。
Mineralization of nitrogen from various sources can contribute significantly to soil nitrogen balance, to total plant nitrogen availability, and to environmental quality and global change.
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