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根据定位观测资料，阐述了南亚热带丘陵赤红壤水分循环的动态特征。研究结果表明，南亚热带丘陵赤红壤贮水量存在年际变化和显著的季节变化：雨季（4～9月）土壤贮水量相当于田间持水量的90％以上，个别月甚至超过贮水库容量。但旱季月土壤贮水量低，相当于田间持水量的50％～80％，需要补充水分才能及时满足植物所需的水分。
According to the observed data, the dynamic characteristics of the water cycle of latosolic red soil in the south subtropical zone are expounded. The results show that there are interannual variations and seasonal variations in the water storage capacity of latosolic red soils in the south subtropical zone: the soil water storage in the rainy seasons (April-September) is equivalent to more than 90% of the field capacity, and even exceeds the capacity of the storage reservoirs in individual months. However, the soil moisture in the dry season is low, equivalent to 50% ~ 80% of the field capacity. Water needs to be replenished to meet the water requirements of plants in time.