田间测定和模拟试验表明,土壤有机质含量越高,土壤持水力越强。土壤有机质含量与有效水最大贮量呈正相关,与土壤总孔隙度、毛管孔隙度和通气孔隙度呈显著正相关。有机质含量越高,土壤孔隙状况越好,土壤有效水含量越高。 Field measurements and simulation tests showed that the higher soil organic matter content, the stronger soil water holding capacity. The content of soil organic matter was positively correlated with the maximum effective water storage, and positively correlated with the total soil porosity, capillary porosity and aeolian porosity. The higher the organic matter content, the better the soil pore condition, the higher the soil effective water content.