Study on the nutritional status of mangrove forest soils in Shenzhen Bay

Mangrove forest Soil samples in 6 points were tested monthly on Shenzhen Bay, for soil physical, chemical properties and nutrient elements contents from Nov. 2009 to Oct. 2011. The results showed that soil water contents was abundant and undulated seasonally. Soil pH was between 6.5 to 7.5, a potential acid sulfate soils; soil conductivities were high and rich of salts; silt contents accounted for the largest proportion in soil texture; organic matter contents were extremely rich, and distributed uneven; Soil ammonia and nitrate nitrogen contents together valued about 100 mg/kg; soil available phosphorus contents were about 30mg/kg and available potassium contents were about 750 mg/kg; are fertile soils compared to ordinary agricultural soils. Soil nutrient contents in each sampling point were decreased significantly in early 2011 and rebounded in the end of 2011, because environment administer were taken place seriously during Shenzhen Universiade.