本文關鍵詞：基于土壤物理基本參數的土壤導熱率模型　出處：《農業(yè)工程學報》2016年02期 　論文類型：期刊論文

  更多相關文章： 土壤 模型 含水率 土壤物理基本參數 土壤導熱率模型 改進模型

【摘要】：土壤物理基本參數是影響土壤導熱率的重要因素,為了獲取土壤的顆粒組成、有機質含量與土壤導熱率計算模型中參數之間的關系,該文分析了陜西省9個地區(qū)的土壤質地對土壤導熱率的影響,對不同土壤導熱率估算模型的準確性進行評價,并在C?té-Konrad模型和Lu-Ren模型的基礎上,建立了基于土壤物理基本參數的改進模型,結果表明:改進的C?té-Konrad模型與改進的Lu-Ren模型可以用來擬合不同質地的土壤導熱率,且具有較好的擬合精度,決定系數R2均在0.92以上,相對誤差(relative error,Re)均低于9.6%;對于砂粒含量或粉粒含量較高的土壤導熱率,改進的C?té-Konrad模型模擬結果的均方根誤差(root-mean-square error,RMSE)≤0.1183、R2≥0.9259以及Re≤9.55%,均優(yōu)于C?té-Konrad模型、Lu-Ren模型和改進Lu-Ren模型;對于砂粒和粉粒含量均較低的土壤導熱率,改進Lu-Ren模型模擬結果的RMSE≤0.0815、R2≥0.9326,Re≤8.21%,均明顯優(yōu)于其他3種模型。兩種改進的模型分別建立了模型參數與顆粒組成、有機質含量之間的關系,能夠更加詳細描述土壤物理基本參數與導熱率之間的關系,并且針對不同的土壤質地,選取合適的改進模型能夠更加準確地計算土壤導熱率。
[Abstract]:The basic parameters of soil physics are the important factors affecting the soil thermal conductivity. In order to obtain the particle composition of the soil, the relationship between the organic matter content and the parameters in the calculation model of soil thermal conductivity is discussed. This paper analyzes the influence of soil texture on soil thermal conductivity in nine regions of Shaanxi Province, and evaluates the accuracy of different soil thermal conductivity estimation models. Based on t 茅 -Konrad model and Lu-Ren model, an improved model based on the basic parameters of soil physics is established. T 茅 -Konrad model and improved Lu-Ren model can be used to fit the soil thermal conductivity of different textures, and the coefficient of determination R2 is above 0.92. The relative error is lower than 9.6; For the soil thermal conductivity with higher sand content or silt content, the improved C? The root-mean-square error (RMSE) of the simulation results of t 茅 -Konrad model is less than 0.1183. R2 鈮，

本文編號：1408490