摘要
在农村搞测土配方施肥,目前普遍应用的还是土壤普查时拟定的速测法,快捷而廉价。作者根据近年千余土样的操作,发现速效磷的测定方法仍然可用,但该法当土壤高磷、低磷时,未指明分析措施。本次探讨结论为高磷时的稀释必须用0.5moL/LNaHCO3,低磷时则用添加标准液法(以浓测稀),如此可使测定数值正好落在色阶曲线上,符合比尔定律,从而补充了普查原法,使该法更加完整。
In the rural areas for soil testing and fertilizer formula is currently widely used or when the soil survey prepared by speed measurement method,fast and cheap.Authors in recent years the operation of more than a thousand soil samples and found that available P determination method is still available,but the law when the soil of high phosphorus,low phosphorus,the analysis does not specify the measures.The study concluded that when the dilution of high phosphorus must be 0.5 moL/L NaHCO3,phosphorus was used when you add the standard solution method(in order to dilute concentration measured),so can just fall Levels measured value curve,consistent with Beer's law,thus supplementing the census of the original law,to make the law more complete.
关键词
高磷
低磷
标准液
以浓测稀
gigh-phosphorus
phosphorus
standard solution
to dilute concentration measured
