There wes wery significant difference in the result determined NH+4 - N between two sizer ofCorway Continers. The Conger the diameter,the higher the result.

• 两种规格的扩散皿测定土壤铵态氮的结果差异达到了极显著水平.；直径较大的扩散皿测定铵态氮的结果比较高