The burrowing activities of earthworms can change the soil macropore structure in terrestrial ecosystems. Studying the burrows structure and their effects on soil water movement may be crucial for exploring earthworm ecological functions and improving water use efficiency in farmlands in semi-humid areas. It was an experiment taken to assess the impact of anecic earthworm Metaphire guillelmi on the characteristics of soil macropore and soil water content (SWC). Earthworms with different densities (0, 3 and 10 in. in each column) were introduced in soil columns (height 38 cm, diameter 23 cm) for 33 days. The macropore characteristics were determined by X-ray computed tomography (CT). Results showed that increasing earthworm density increased the macroporosity and macropore number. The macropore number in the high-density earthworm treatment (HDE) was 1.3 times larger than that in columns with low-density earthworm (LDE). The diameter of soil macropores ranged from 2.12 mm to 7.30 mm. The mean macroporosities in HDE and LDE treatments were 1.35 % and 0.61 %, respectively. The soil pore morphology (mean macropore circularity, branch, junction and connectivity) was also improved by earthworms. The high number of macropores (45.30/N) and connectivity (0.05 cm⁻³) were observed in the column with high density of earthworms. Earthworms improved the soil macropores and macroporosity. The SWC linearly decreased with increasing earthworm density. A significant difference (P < 0.05) of SWC was observed between columns with earthworm (LDE and HDE) and those without earthworm (CK), especially at the 10–30 cm soil depth. The burrows generally open to the soil surface and increased water vapour transfer channels, thus accelerated soil evaporation. In areas with uneven rainfall, high earthworm density could aggravate the risk of seasonal drought at the plough layer, which is an important threaten for crop growth and yield.

的穴居活动可以改变陆地生态系统中的土壤大孔结构。研究洞穴结构及其对土壤水分运动的影响对于探索exploring的生态功能和提高半湿润地区农田的水分利用效率可能至关重要。这是一项评估风化Meta Metaphire guillelmi的影响的实验土壤大孔和土壤水分（SWC）的特征 将不同密度（每列0、3和10英寸）的。引入土壤列（高38厘米，直径23厘米）中33天。大孔特征通过X射线计算机断层摄影术（CT）确定。结果表明，增加density的密度会增加大孔和大孔数。高密度earth处理（HDE）中的大孔数是低密度earth（LDE）色谱柱中大孔数的1.3倍。土壤大孔的直径范围为2.12毫米至7.30毫米。HDE和LDE处理的平均大孔隙率分别为1.35％和0.61％。earth还改善了土壤孔隙形态（平均大孔圆形度，分支，交界和连通性）。大孔数量众多（45。在具有高密度worm的柱中观察到^-3。improved改善了土壤的大孔和大孔隙度。SWC随着earth密度的增加而线性下降。在有worm（LDE和HDE）的柱与没有earth（CK）的柱之间，特别是在10–30 cm土深处，观察到SWC的显着差异（P <0.05）。洞穴通常向土壤表面敞开，增加了水蒸气的传输通道，从而加速了土壤的蒸发。在降雨不均的地区，high密度过高会加剧耕层季节性干旱的风险，这是对作物生长和单产的重要威胁。