本文对宁南山区6个重点小流域坡改梯工程实施后的不同建设年限梯田土壤含水量进行了为期4年的定点跟踪监测与研究。研究结果表明：水平梯田修建过程中土壤结构和土壤理化性状被改变，导致梯田修建初期土壤保水能力降低，与坡耕地土壤含水量相比，1~2年新修梯田不同土层土壤含水量均有所下降，但减少幅度较小；梯田改造种植3~5年后，土壤含水量恢复并高于修建前；5年以上梯田不同土层深度土壤含水量较坡耕地显著提高。
In this paper, the soil moisture content of terrace with different construction years in 6 key watershed areas of Southern Ningxia area was monitored and studied at fixed point for 4 years. The research results show that: The soil structure and properties were changed during the construction of horizontal terraces, the water retention capacity of soil was reduced in the early stage of terrace construction. Compared with the soil water content of sloping farmland, the soil water content of different soil layers in newly constructed terraced fields decreased in 1~2 years, but the decrease was small. After 3~5 years of terrace reconstruction, the soil moisture content recovered and was higher than before the reconstruction. The soil moisture content of terraced fields at different depths in more than 5 years was significantly higher than that of sloping farmland.
