湛江湾红树林土壤理化性质的研究

湛江湾红树林在防止海岸侵蚀和减轻台风危害中起到重要作用。为研究其土壤环境现状，选择东海大堤、礼部村、特呈岛3个代表性的红树林样地，采集各样地土层深为0~10、10~20、20~30、30~50 cm的土壤样品，采用常规土壤实验方法测定pH、有机碳含量、全氮量、碱解氮含量、全磷量、速效磷量、全钾量、速效钾量和水溶性盐量等9个理化指标，结果表明随着土层加深，土壤的上述各理化性质均有显著变化，土壤呈强酸性，向酸性硫酸盐土方向演化，土壤盐分含量高，具有显著盐渍化特征。建议优化红树林土壤环境。

Study on the Soil Physical and Chemical Characteristics of Mangrove Forest in Zhanjiang Bay

The mangrove forest in Zhanjiang Bay plays an important role in prevention of coastal erosion and typhoon hazards. In order to reveal soil characteristics, 3 sample plots of mangrove forests respectively located at Donghai Dake, Libu Village and Techeng Island were set up, and the soil samples at depth of 0-10 cm, 10-20 cm, 20-30 cm, 30-50 cm were collected. Then the pH, carbon content, total N and available N content, total P and available P content, total K and available K content, and salt content were examined. The result showed that the 9 soil physical and chemical indicators tested varied obviously along with the increase in soil depth. The soil was highly acidic, and developed towards acid sulphate soil. The high salt content was also found in the soil, exhibiting salinization characteristics. Optimizing the soil environment was suggested.