肥料养分速测仪与常规方法测定养分含量的比较研究

为探究肥料养分速测仪在实际生产中应用的可行性,对氮、磷、钾3种单元素肥料分别用常规方法和速测法进行测定。结果显示：对于铵态氮肥,速测法测定的含量高于常规方法;测得钾肥含量两者有高有低,但差距较小;测得磷肥含量相差很大;常规方法稳定性高于速测法,且测得的结果更接近于理论值。差异性分析显示：对于铵态氮肥,常规方法与速测法测得的结果差异显著（p〈0.05）;对于钾肥,常规方法与速测法测得的结果差异不显著（p〉0.05）;对于磷肥,常规方法与速测法测得的结果差异显著（p〈0.05）。

Comparison of Fertilizer Nutrient Speed Measuring Instrument and Conventional Methods for the Determination of Nutrient Content

In order to explore the feasibility of fertilizer nutrient speed measuring instrument used in practical production, N, P, K contents were determined respectively with conventional method and speed measuring method. For the ammonium nitrogen fertilizer, the content determined with the rapid method was higher than that of conventional method. There was little difference between the potassium contents measured with conventional method and speed measuring method. For the phosphate content, the values measured＆amp;nbsp;with the two methods are different greatly. The conventional method was more stable than the rapid method, and the measured result was closer to the theoretical value. Differences analysis showed that for the ammonium nitrogen fertilizer and phosphate, the rapid method and conventional method showed significant difference （p＆lt;0.05）;for the potassium, there were no significantly difference between the determination results with rapid method and the conventional method （p＆gt;0.05）.