通过田间条件下砂滤管试验 ,研究了不同膨润土施用量及有机物料对砂土土壤含水量和有机质含量的影响。结果表明 ,施用膨润土和有机物料能显著地提高砂土土壤含水量和有机质含量 ,且二者存在明显的交互作用 ,差异达极显著水平。施用膨润土能明显增加土壤有机质的累积量 ,说明在施用同样有机物料的前提下 ,施用膨润土可明显提高砂土土壤有机质含量 Through the sand filter test under field conditions, the effects of different bentonite application rates and organic materials on soil moisture content and organic matter content were studied. The results show that the application of bentonite and organic materials can significantly improve soil water content and organic matter content of sand, and there is a significant interaction between the two, the difference reached a significant level. Application of bentonite can significantly increase the accumulation of soil organic matter, indicating that the same application of organic materials under the premise of the application of bentonite can significantly improve soil organic matter content of sand