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根据室内测定资料,对雷州半岛桉林地砖红壤水分性能进行了探讨。结果表明,与自然植被下的砂页岩赤红壤比较,浅海沉积物桉林-砖红壤导水性、持水能力及供水能力均较低。在同样的吸力下,土壤持水量较少,在同样的吸力段,土壤释放的水量较少;玄武岩桉林-砖红壤持水能力较高,但导水性和供水能力较低。通径分析结果表明,浅海沉积物桉林-砖红壤持水能力较低主要受粘粒较少影响,其水分的有效性较低主要与其有机质的较少有较大关系;玄武岩桉林-砖红壤持水能力较高而水分的有效性较低,主要受其粘粒含量较高、有机质含量较低的制约。
According to the indoor measurement data, the water characteristics of eucalyptus woodland red soil in Leizhou Peninsula were discussed. The results showed that, compared with sandy loam red soil under natural vegetation, the water conductivity, water holding capacity and water supply capacity of eucalyptus - red brick in shallow sea sediments were low. Under the same suction, the soil has less water holding capacity, and the amount of water released by the soil is less in the same suction section; basalt eucalyptus - brick red soil has higher water holding capacity but lower water conductivity and water supply capacity. The results of path analysis showed that the lower water holding capacity of eucalyptus-brick red soil in shallow sea sediments was mainly due to the less influence of clay particles and the lower water availability was mainly due to the less organic matter. Eucalyptus- Red soil has higher water holding capacity and lower water availability, mainly due to its high clay content and low organic matter content.