【摘 要】
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该文应用双剖面土壤切片成像法结合土壤优先水流穿透曲线,首次研究了4种主要地带性土壤:红壤、赤红壤、黑土和棕壤的大孔隙特征.系统划分了大也隙类型;描述了大孔隙形态;通过
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该文应用双剖面土壤切片成像法结合土壤优先水流穿透曲线,首次研究了4种主要地带性土壤:红壤、赤红壤、黑土和棕壤的大孔隙特征.系统划分了大也隙类型;描述了大孔隙形态;通过对土壤切片图像数字化处理和分析,获得了描述大孔隙特征的两个基本指标:大孔隙度和周长,并对大孔隙进行了定量化地描述;比较了各土类之间大孔隙的形态差异,从土壤发生学的角度对其原因进行了分析;研究了地带性差异、土壤层次和土地利用方式对大孔隙特征的影响;阐明了小尺度范围大孔隙的空间分布特征;结合Br<->标记优先水流穿透曲线分析了大孔隙的连通性和弯曲性,探讨大孔隙形态指标评价大孔隙优先水流作用强弱的可行性.
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