王小华,贾克力,刘景辉,李立军.Van Genuchten模型在土壤水分特征曲线拟合分析中的应用[J].干旱地区农业研究,2009,27(2):179~183
Van Genuchten模型在土壤水分特征曲线拟合分析中的应用
Application of Van Genuchten model to analysis of soil moisture characteristic curve
  
DOI：10.7606/j.issn.1000-7601.2009.02.33
中文关键词:  土壤水分特征曲线  Van Genuchten模型  耕作,非线性拟合,非线性回归函数
英文关键词:soil moisture characteristic curve  tillage  Van Genuchten model  nonlinear curve fitting  nonlinear regression function
基金项目:国家科技支撑课题“农牧交错风沙区保护性耕作技术集成研究与示范”(2006BAD15B05)
作者单位
王小华 College of Water Conservency and Civil Engineering,Huhhot,Inner Monggolia 010018,China 
贾克力 College of Water Conservency and Civil Engineering,Huhhot,Inner Monggolia 010018,China 
刘景辉 College of Agronomy Inner Mongolia Agricultural University,Huhhot,Inner Monggolia 010018,China 
李立军 College of Agronomy Inner Mongolia Agricultural University,Huhhot,Inner Monggolia 010018,China 
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中文摘要:
      利用Matlab软件的非线性拟合和非线性回归函数,对传统耕作和免耕耕作两种方式下土壤水分特征曲线进行分析,建立相应的Van Genuchten模型,并对模型进行检验和应用。结果表明,非线性回归较非线性拟合适应性高;Van Genuchten模型适应性好,可以应用于不同耕作条件下的土壤水分分析。
英文摘要:
      Two useful functions of Matlab software are used, namely, nonlinear curve fitting and nonlinear regression function.The soil moisture characteristic curves under zero tillage and conventional tillage are analyzed.Van Genuchten model is used to model the soil characteristic curves under the conditions of zero tillage and conventional tillage.The results show that the nonlinear regression function has better adaptability.Van Genuchten model can be used in soil moisture analysis under different tillage conditions.
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