文献类型：期刊文献

中文题名：比浊法测定土壤中的有效硫

英文题名：Determination of Available Sulfur in Soil by Nephelometry

作者：屈明华[1] 朱磊[2] 倪张林[1]

第一作者：屈明华

机构：[1]中国林业科学研究院亚热带林业研究所;[2]国家林业局华东林业调查规划设计院

年份：2011

卷号：28

期号：4

起止页码：1845-1848

中文期刊名：光谱实验室

外文期刊名：Chinese Journal of Spectroscopy Laboratory

收录：北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：土壤;有效硫;比浊法;直线回归方程;多项式回归方程

外文关键词：Soil; Available Sulfur; Nephelometry; Linear Regression Equation; Multiple Regression Equation

分类号：O657.39

摘要：主要探索了采用比浊法测定土壤有效硫最佳的比浊时间;采用最小二乘法拟合校准曲线时,由于低浓度灵敏度低,不成直线,校准曲线达不到技术要求,测试结果准确度低,本文通过实验摸索和定量分析研究,采用多项式回归方程绘制校准曲线相关性要明显优于直线回归方程绘制的校准曲线,回收率达到96.4%,多项式方程定量测定结果的准确度明显高于直线方程拟和计算的结果测试结果更加可靠。
The best time for nephelometry to determine available sulfur in soil was studied.The calibration curve fitted by least square method was not linear,for the low concentration resulted in a low accuracy,so calibration curve can＇t achieved technical requirements and the results was in a low accuracy.By way of experiment study and quantitative analysis,the results showed that the correlation of calibration curve plotted by multiple regression equation was better than of the linear regression equation with recovery of 96.4%,and the results of which were more accurate.