深圳湾红树林保护区土壤营养状况研究

2009年11月至2011年10月期间每月对深圳湾红树林保护区6个采样点进行土壤样本采集,并对土壤的理化性质和营养元素含量进行测定,结果发现:土壤含水量高,存在一定的季节性变化;土壤pH值在6.5～7.5之间;土壤电导率高,含盐丰富;土壤粉粒含量所占比例最大;有机质含量极其丰富,各样点差异较大;各采样点速效氮含量在100 mg/kg左右;有效磷含量在30 mg/kg左右;速效钾含量在750 mg/kg左右,比农田土壤丰富得多;说明流经市区的两条河流将丰富的营养物质带入深圳湾.在2011年年初,监测到的各项营养元素的含量骤然降低,与深圳筹备26届世界大学生运动会期间环境治理密切相关,而在2011年年底各项指标出现反弹.

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.