节水灌溉Issue(8)：73-79,7.DOI:10.12396/jsgg.2025502
预测生物炭添加对土壤饱和水力传导度的影响
Predicting the Effect of Biochar Addition on Soil Saturated Hydraulic Conductivity
摘要
Abstract
As a soil amendment,the effect of biochar application on soil saturated hydraulic conductivity is governed by multiple factors,such as application rate,biochar type,and soil texture,and the underlying mechanism remains poorly understood.This study combined field experiments with three-dimensional modeling to investigate the improvement effects of rice straw biochar and bamboo biochar at different addition rates(3%,6%)on the saturated hydraulic conductivity of silt loam soil in the Qujialing experimental field.Field results indicate that 3%rice straw charcoal and 6%bamboo charcoal treatments enhanced saturated hydraulic conductivity in the 0～20 cm soil layer,while 6%rice straw charcoal and 3%bamboo charcoal produced inhibitory effects.To elucidate the underlying mechanisms,a 3D pore structure model of the soil-biochar mixture was constructed using Blender software to calculate the mixture porosity.Subsequently,the Terzaghi and Chapuis models were applied to predict the soil hydraulic conductivity.Comparisons revealed that the Terzaghi model more closely approximated measured values,while the Chapuis model systematically underestimated them.Both models reproduced the experimental trends observed with rice straw charcoal treatment,confirming that moderate amounts of rice straw charcoal improve saturated hydraulic conductivity by optimizing pore connectivity.However,both models exhibited certain deviations in predicting bamboo charcoal effects,primarily due to their failure to account for internal bamboo charcoal porosity.关键词
生物炭/饱和水力传导度/田间实验/孔隙度模型/土壤改良Key words
biochar/saturated hydraulic conductivity/field experiment/porosity model/soil amendment分类
农业科技引用本文复制引用
江振,谢华,黄爽,刘迪,郑文慧,孟卓文..预测生物炭添加对土壤饱和水力传导度的影响[J].节水灌溉,2026,(8):73-79,7.基金项目
国家自然科学基金项目(52509068) （52509068）
国家自然科学基金项目(52179040). （52179040）
