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。
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.
出处
《干旱地区农业研究》
CSCD
北大核心
2009年第2期179-183,188,共6页
Agricultural Research in the Arid Areas
基金
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)
