吉林省黑土与盐碱土中氮形态及含量预测方法

Nitrogen form and content prediction method in black soil and saline-alkali soil from Jilin Province

为查明吉林省黑土、盐碱土理化性质和氮形态含量特征差异并建立氮形态含量预测方法,通过数据对比分析及基于MATLAB的偏最小二乘回归预测方法研究了两类土壤的性质差异和硝态氮、铵态氮含量的回归预测。结果表明,黑土、盐碱土在pH值、有机质、碱解氮、硝态氮和铵态氮含量上均有显著差异;提出了基于土壤理化指标的偏最小二乘法估计土壤中两种氮形态的含量,效果良好。

In order to identify the differences in physicochemical properties and nitrogen form content between black soil and saline-alkali soil in Jilin Province and to establish a method for predicting nitrogen form content,the discrepancies in properties and the regression predictions of nitrate and ammonium nitrogen content from the two types soils were investigated by comparative data analysis and partial least squares regression prediction method based on MATLAB.The results showed that there were significant differences between black soil and saline-alkali soil in terms of pH value,organic matter,alkaline nitrogen,nitrate nitrogen and ammonium nitrogen contents.The partial least squares method based on soil physicochemical indicators was proposed to estimate the contents of the two nitrogen forms in soils with good results.