Effects of Aquaculture and Vegetation Restoration on the Soil of Mangrove Wetland
Effects of aquaculture on the soil of mangrove wetland and effects of the restoration of mangrove forest on abandoned shrimp farming ponds were studied by measuring the total nitrogen (TN), total phosphorus (TP), total potassium (TK), the total microbial DNA and the soil organic carbon (SOC) in the soils respectively of original mangrove forest, shrimp farming and ducking pond and abandoned shrimp farming pond. Result showed a higher contents of TN and SOC in the mangrove forest;The lowest content of TN was found in the abandoned shrimp pond (A) and the lowest content of SOC was found in the abandoned pond (B). As for the content of TP, the highest content was found in duck pond and the lowest content in the abandoned shrimp pond B. The content of TK appeared a higher level in the abandoned shrimp pond A than all of other sample sites, and the lowest level appeared in the duck pond. The surface soil of total microbial DNA leaded the highest level in duck pond and the lowest level in the abandoned shrimp pond A. The soil C/N decreased with the increasing trend of the total microbial DNA. After plantation restoration in abandoned shrimp ponds, the SOC and TN increased, while the TK decreased gradually, and the variation range of TP was wide. But all the contents in abandoned shrimp ponds were gradually close to those of the original mangrove forest, indicating that vegetation restoration could rehabilitate the soil of the abandoned shrimp ponds.
NETL
NSTL
万方数据
维普
