| 土壤有效硫测定时标准曲线绘制方法的研究 |
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| 引用本文： | 张玉珠,陈丽芝,王艳辉,范琦智,冯建军.土壤有效硫测定时标准曲线绘制方法的研究[J].内蒙古农业科技,2008(6):64-65. |
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| 作者姓名： | 张玉珠 陈丽芝 王艳辉 范琦智 冯建军 |
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| 作者单位： | 兴安盟科右中旗农业局,内蒙古,科右中旗,029400 |
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| 基金项目： | 国家农业部测土配方施肥项目
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| 摘 要： | 用硫酸钡比浊法测试土壤有效硫，绘制硫标准曲线时，低浓度的一端不成直线，所以标准曲线达不到技术要求，测试结果准确度很低．经过严格的试验设计和定量分析研究，结果表明，用多项式绘制的标准曲线相关性要明显高于用直线回归方程绘制的标准曲线。
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| 关 键 词： | 有效硫标准曲线 硫酸钡比浊法 直线回归方程 多项式回归方程 |
Standard Curve Plotting Method of Available Sulphur Determination in Soil |
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| ZHANG Yu-zhu.Standard Curve Plotting Method of Available Sulphur Determination in Soil[J].Inner Mongolia Agricultural Science and Technology,2008(6):64-65. |
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| Authors: | ZHANG Yu-zhu |
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| Institution: | ZHANG Yu-zhu (Agricultural Extension Station of Inner Mongolia Keyouzhongqi,Keyouzhongqi 029400, China) |
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| Abstract: | When measuring the soil effective sulfur using barium sulfate nephelometery,the plotted specification curve could not meet design requirements because that the low concentration points were not in a straight line resulted in a low accuracy in the determination results.After some quantitative analysis and strict design,the results showed that the correlation of the specification curve plotted using multiple regression equation was significantly highly than that of the linear regression equation. |
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| Keywords: | Specification curve of effective sulfur Barium sulfate nephelometery Linear regression equation Multiple regression equation |
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