超薄可降解聚氨酯包膜尿素的快速检测方法

采用静水溶出率法，在不损伤包膜的情况下，找出高温（50℃）静水浸提树脂包膜尿素与常温（25℃）静水浸提时间的相关系数。结果表明：通过50℃静水浸提来检测相应指标，可以有效缩短缓释肥料国家标准（GB／T23348-2009）和控释肥料行业标准（HG／T4215-2011）采用的25℃静水浸提检测所需的时间；树脂包膜尿素养分累积释放曲线相关系数均≥0．9900，呈极显著水平；检测时间只需8—10d，测量误差范围在2％-3％。

Rapid Detection Method of Super-Thin Degradable Polyurethane Coated-Urea

By adopting static water dissolution rate method, the extraction time coefficient of correlation was found out to extract resin-coated urea in high temperature static water （50℃ ） and in static water of ordinary temperature （25 ℃ ） under the circumstance of none injury to the coating of urea. The results showed that by using static water of 50 ℃ to detect the relevant index as per the national standard of slow-release fertilizers （ GB/T 23348--2009 ） and the industry standard of control- release fertilizers （ HG/T 4215-2011 ） the extraction time was shorter than by using static water of 25 ℃, the correlation coefficient of accumulate dissolution curve of resin-coated urea nutrient was ≥ 0.990 0 which was highly significance level, and the detection could be finished within 8 -10 days with an error of 2% -3%. Keywords slow-release fertilizer resin-coated urea accumulate release rate of nutrient rapid detection