| 钾解吸动力学方程及方程常数的应用 |
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| 作者姓名： | L&#; Xiao-Nan LU Yun-Fu |
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| 作者单位： | [1]InstituteofSoilandFertilizer,ZhejiangAcademyofAgriculturalSciences,Hangzhou310021,China [2]InstituteofSo,ZhejiangAcademyofAgriculturalSciences,Hangzhou310021,China |
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| 基金项目： | *1Project supported by the National Natural Science Foundation of China and by the Zhejiang Provincial Natural Science Ruindation. |
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| 摘 要： | Elovich,parabolic diffusion,power function and exponential equations were used to describe K desorption kinetics of 12 soils in a constant electric field of electro-ultrafiltration(EUF),Results showed that the Elovich,parabolic diffusion and power function equations could describe K desorption kinetics well owing to their high correlation coefficients and low standard errors;but the exponential equation was not suitable to be used in this study due to its relatively low correlation coefficients and relatively high standard errors.This work established successfully the relationships between the constants(slope or intercept)of kinetic equations and the barley responses to K fertilizer in the multiple-site field experiments and K-supplying status of soilsk,the constants of Elovich,parabolic diffusion and power function equations were very significantly or significantly correlated to the soil available K,relative yield of barley and K uptake of barley in NP plot.It was suggested that the kinetic equation constants could be used to estimate K-supplying power of soils.
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| 关 键 词： | 土壤钾 钾解吸附 动力学方程 方程常数 应用 |
Kinetic equations of potassium desorption and the application of equation constants |
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| L&#; Xiao-Nan,LU Yun-Fu.Kinetic equations of potassium desorption and the application of equation constants[J].Pedosphere,1995,5(4):371-378. |
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| Authors: | L&#; Xiao-Nan and LU Yun-Fu |
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| Institution: | [1]InstituteofSoilandFertilizer,ZhejiangAcademyofAgriculturalSciences,Hangzhou310021,China [2]InstituteofSo,ZhejiangAcademyofAgriculturalSciences,Hangzhou310021,China |
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| Abstract: | Elovich,parabolic diffusion,power function and exponential equations were used to describe K desorption kinetics of 12 soils in a constant electric field of electro-ultrafiltration(EUF),Results showed that the Elovich,parabolic diffusion and power function equations could describe K desorption kinetics well owing to their high correlation coefficients and low standard errors;but the exponential equation was not suitable to be used in this study due to its relatively low correlation coefficients and relatively high standard errors.This work established successfully the relationships between the constants(slope or intercept)of kinetic equations and the barley responses to K fertilizer in the multiple-site field experiments and K-supplying status of soilsk,the constants of Elovich,parabolic diffusion and power function equations were very significantly or significantly correlated to the soil available K,relative yield of barley and K uptake of barley in NP plot.It was suggested that the kinetic equation constants could be used to estimate K-supplying power of soils. |
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| Keywords: | barley constant electro-ultrafiltration (EUF) kinetic equation K desorption |
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