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对丘陵赤红壤水分性能变化的研究结果表明，与地带性自然植被下丘陵赤红壤比较，次生植被或人工植被下丘陵赤红壤水分性能变劣，表现在导水性降低，１２０ｍｉｎ饱和渗水量减少，自然赤红壤比耕型赤红壤的减幅大；持水能力下降，在同样吸水力下，土壤持水量较少；供水能力下降，在同样吸力段，表土释放的水量较少；亚表土在低吸力段释放水量较少。通径分析结果表明，养分贫瘠化，特别是贫有机质化，是丘陵赤红壤水分性能降低的主要内在因素。
The results showed that compared with the hilly red soil in the hilly natural vegetation, the water quality of the hilly red soil in the secondary vegetation or artificial vegetation was deteriorated, the water conductivity decreased, the saturated water loss decreased in 120 min, Natural red soil decreased more than cultivated red soil, and the water holding capacity decreased. Under the same water absorption, soil water content was less and the water supply capacity decreased. In the same suction section, the amount of water released from topsoil was less. The suction section releases less water. The results of path analysis showed that nutrient depletion, especially lean organic matter, was the main internal factor to reduce the water performance of hilly red soil.