辽宁工程技术大学学报（自然科学版）2012，Vol.31Issue(3)：366-369,4.
砂质土壤持水特性空间变异特征传递函数模型
Spatial variability of water retention capability in aeolian sandy soil and its pedotransfer function
摘要
Abstract
In order to investigate the spatial characteristics of water retention capacity in soil, this study applied Vereecken and Campbell models to predict field capacity (θ60cm) and wilt point (θ15000 cm) of aeolian sandy soils in western Liaoning. In addition, their spatial variations were analyzed using traditional statistics and geostatistical methods. The results show that Vereecken and Campbell models result in a lower accuracy and precision for θ60 cm than that of θ15 000 cm. while Vereecken model provides more precise results than that of Campbell prediction. Although the semi-variance model parameters and fractal dimension for 20-40 cm predicted by Vereecken model are closer to the measured data than that of Campbell model, it cannot describe the spatial variability structure of θ60cm and θ15 000 cm in 0~20 cm depth intervals. Therefore, Vereecken model may predict θ60 cm and θ15 000 cm in 20-40 cm and its spatial variation.关键词
土壤传递函数/风沙土/田间持水量/萎蔫含水量/Vereecken模型/Campbell模型/半方差函数/分形维数Key words
pedotransfer functions/ aeolian sandy soil/ field capacity/ wilting point/ Vereecken model/ Campbellmodel/ self-variogram/ fractal dimension分类
农业科技引用本文复制引用
王改改,张玉龙,虞娜..砂质土壤持水特性空间变异特征传递函数模型[J].辽宁工程技术大学学报（自然科学版）,2012,31(3):366-369,4.基金项目
国家“973”项目子课题基金资助项目(2011CB100502) （2011CB100502）
