农业机械学报2012，Vol.43Issue(3)：51-56,6.DOI:10.6041/j.issn.1000-1298.2012.03.010
基于联合多重分形的土壤水分特征曲线土壤传递函数
Pedotransfer Functions of Soil Water Retention Curve Based on Joint Multifractal
摘要
Abstract
The factors that have obvious effects on spatial variability at the different scales were identified with joint multifractal, and pedotransfer functions of van Cenuchten model parameters which considered scale effect at small and large scale were established based on the above educed conclusion, furthermore, feasibility that concluded and educed at small scale with joint multifractal and applied at large scale was explored. The results showed that root mean square error of forecasted soil water content based on pedotransfer functions of van Genuchten model parameters in 0 ~ 20 cm and 20 ~ 40 cm soil layers at small scale was 0. 038 6 and 0. 047 3 respectively, and RMSE of forecasted soil water content based on pedotransfer functions of van Genuchten model parameters in 0 ~ 20 cm and 20 ~ 40 cm soil layers at large scale was 0. 027 0 and 0. 030 4 respectively; conclusions educed at small scale with joint multifractal could be applied at large scale, and pedotransfer functions based on these conclusions had strong theoretical foundation and high precision.关键词
土壤水分特征曲线/土壤传递函数/联合多重分形Key words
Soil water retention curve/Pedotransfer functions/Joint multifractal分类
农业科技引用本文复制引用
刘继龙,马孝义,张振华,付强..基于联合多重分形的土壤水分特征曲线土壤传递函数[J].农业机械学报,2012,43(3):51-56,6.基金项目
国家自然科学基金资助项目(50879072)、黑龙江省教育厅科学技术研究资助项目(12511046)和西北农林科技大学人才专项资金资助项目(BJRC-2009-001) （50879072）
