To compare the characteristics of soil physical and chemical indexes in mangrove from different regions. We research the distribution and correlation of soil physical and chemical properties in two different regions mangrove plantations in Qi'ao Island and Fenghuojiao. Soil total nitrogen, total phosphorus, pH, electrical conductivity and organic carbon contents in 0–100 cm vertical direction were measured, and further analyzed their correlation. The results showed that the soil physicochemical indexes of Qi'ao Island in the vertical direction of total nitrogen, total phosphorus, salinity content, electrical conductivity, organic carbon and bulk density with soil depth change more gently than those of Fenghuojiao, and the salt content and pH of soil in Fenghuojiao were significantly higher than those of Qi'ao Island. The total nitrogen and conductivity of Qi'ao Island were higher than those of Fenghuojiao. In 0–15 cm and 15–30 cm soil layers, the organic carbon content of Fenghuojiao was significantly higher than that of Qi'ao Island, but lower in 30–100 cm soil layers. There was a significant negative correlation between total nitrogen and salinity content, and a significant positive correlation between total nitrogen and pH in Fenghuojiao soil. There was a significant negative correlation between total nitrogen content and salinity content, a significant positive correlation with pH, and a significant correlation between organic carbon content and salinity content, pH.
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