土表的硝态氮浓度不断增加，烤田增大了复水后硝态氮向地下水淋溶的趋势。
The concentration of nitrate-N increased continuously in soil surface, which resulted in nitrate leaching to groundwater after rewetting.
目前中国存在着施肥不合理的现象，亟须简易可靠的田间测土技术，因此，田间土壤硝态氮快速测定方法在中国将有着广阔的应用前景。
The quick on-farm test method is economical, simple and easy for farmers, so it has a largely potential application in China to eliminate the irrational fertilization at present.
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