吉林大学学报(地球科学版) ›› 2015, Vol. 45 ›› Issue (1): 255-264.doi: 10.13278/j.cnki.jjuese.201501208
赵林, 郑义, 毛国柱, 郭华
Zhao Lin, Zheng Yi, Mao Guozhu, Guo Hua
摘要:
天津临港经济区地处滨海, 完全是由填海造陆形成的人工陆地。土壤是港口航道清淤淤泥、近海海沙吹填围海造陆后形成的吹填土, 其性质特殊, 研究吹填土壤中氮磷空间分布对了解该区域环境状况有重要意义。研究发现:天津临港吹填土整体含氮量较低, 按土层深度分布, 平均质量分数为161.73~240.09 mg/kg;含磷量相对丰富, 平均质量分数为355.54~443.27 mg/kg;总氮变异系数较大, 总磷变异系数较小, 氮、磷质量分数主要受不同区域吹填土性质影响。吹填土中有机磷质量分数较少, 平均仅占总磷的3.83%, 吹填土中磷大多以无机磷形式存在, 其相对质量分数从大到小为:钙结合磷(Ca-P) >铁结合磷(Fe-P) >铝结合磷(Al-P) >闭蓄态磷(Oc-P) >碎屑磷(De-P) >交换态磷(Ex-P)。研究表明, 临港吹填土氮、磷质量分数水平对近海环境有潜在富营养污染威胁。
中图分类号:
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