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研究重量法测定脲甲醛缓释肥料的活性指数,对重量法和行业标准HG/T 4137—2010指定测定方法测定结果进行相关性研究。结果表明,两种方法的测定结果存在极显著正相关性,相关系数为0.996 6,两种方法测定值的绝对差值范围为-0.85%~0.56%。重量法具有简便、高效和准确的特点,可替代HG/T 4137—2010中脲甲醛缓释肥料活性指数测定方法。
The gravimetric method was used to determine the activity index of the urea formaldehyde slow-release fertilizer. The correlation between the gravimetric method and the determination of the HG / T 4137-2010 industry-standard determination method was studied. The results showed that there was a significant positive correlation between the two methods and the correlation coefficient was 0.996 6. The absolute difference between the two methods was -0.85% -0.56%. Gravimetric method has the characteristics of simple, efficient and accurate, and can replace the method of measuring the activity index of the urea formaldehyde slow release fertilizer in HG / T 4137-2010.