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土壤田间持水量的非线性预报模型研究

作  者:
岳海晶;樊贵盛
单  位:
太原理工大学水利科学与工程学院
关键词:
田间持水量;土壤理化参数;非线性预报模型;模型分析
摘  要:
基于大田耕作土壤理化参数试验以及田间持水量测定试验数据,首先利用单因素法分析了土壤结构、有机质含量和土壤质地与田间持水量的关系;在单因素分析的基础上建立了具有不同输入变量的土壤田间持水量非线性多元模型结构,利用MATLAB程序语言对不同模型结构进行了非线性回归分析,最终选定回归系数均显著且平均误差最小(5.608%)拟合度最高(0.799 3)的模型结构作为田间持水量的最佳非线性预报模型,并进行实例预测验证其可行性,实现了利用土壤常规理化参数对田间持水量的预测。
译  名:
Nonlinear Prediction Model of Soil Field Moisture Capacity
作  者:
YUE Hai-jing;FAN Gui-sheng;College of Hydro science and Engineering of Taiyuan University Technology;
关键词:
field moisture capacity;;soil physicochemical parameters;;nonlinear prediction model;;model analysis
摘  要:
Based on the test data of soil physicochemical parameters and field moisture capacity,firstly,this paper adopts single factor analysis method to study the relationship between the structure of soil,content of organic matter,soil texture and the field moisture capacity.Then on the basis of single factor analysis,the nonlinear multiple model structure of field moisture capacity with different input variable capacity are established.By the method of nonlinear regression analysis,this paper studies the different model structure according to the MATLAB program language.Finally,the prediction model of field moisture capacity with the minimum average error(5.608%)and the highest fitting(0.799 3)is selected as the best nonlinear prediction model and its feasibility is verified by a forecasting example.This method realized using conventional soil physicochemical parameters to predict the field moisture capacity.

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