CAJ | 학술논문

水土流失径流养分监测通常采用野外采集后进行实验室分析的方法，操作复杂。为验证离子选择电极这种可快速测量养分的方法在水土流失监测中的可靠性，以氨氮离子选择电极为例，与传统纳氏试剂分光光度法进行比较，在准确度、抗离子干扰及坡面径流迁移规律等方面进行实验。结果表明：电极法测定范围最大值为1000 mg/L，分光光度法测定范围最大值为2 mg/L；用幂函数模型模拟坡面径流氨氮迁移规律时，电极法测定值的拟合系数为0.9537，分光光度法的为0.9305。在95%的置信水平上，两方法结果并无显著性差异，而电极法的标准偏差小，其结果更接近标准值。
수토류실경류양분감측통상채용야외채집후진행실험실분석적방법，조작복잡。위험증리자선택전겁저충가쾌속측량양분적방법재수토류실감측중적가고성，이안담리자선택전겁위례，여전통납씨시제분광광도법진행비교，재준학도、항리자간우급파면경류천이규률등방면진행실험。결과표명：전겁법측정범위최대치위1000 mg/L，분광광도법측정범위최대치위2 mg/L；용멱함수모형모의파면경류안담천이규률시，전겁법측정치적의합계수위0.9537，분광광도법적위0.9305。재95%적치신수평상，량방법결과병무현저성차이，이전겁법적표준편차소，기결과경접근표준치。
The soil erosion nutrient loss in runoff was usually analyzed in laboratory after collecting in field which is very complex. This paper presented a fast measuring method which was ion selective electrode( ISE ). To study this method, ammonium ISE and the traditional Nessler's reagent spectrophotometry were investigated by simulating rainfall in accuracy, anti-jamming ability and mechanism of migration. Results show that the maximum value measured of measuring range ISE is 1000mg/L and spectrophotometry was 2mg/L. When the process of ammonia nitrogen loss in runoff on the slope is fitted by power function model,the fitting coefficient of ISE and spectrophotometry is 0. 9537 and 0. 9305. At the 95% confidence level,two methods are no significant difference. Compared with spectrophotometry,the standard deviation ISE is smaller,so the value measured by ISE is more close to the standard value.