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梁子湖湿地植物的氮磷积累特征

熊汉锋1;黄世宽1;陈治平1;廖勤周2;谭启玲3;王运华3   

  1. 1鄂州大学,湖北鄂州436000;2鄂州市土壤肥料工作站,湖北鄂州436000;3华中农业大学资源与环境学院, 武汉 430070
  • 收稿日期:2006-04-05 修回日期:1900-01-01 出版日期:2007-04-03 发布日期:2007-04-03

Accumulation features of nitrogen and phosphorus in plants of Liangzi Lake wetland

XIONG Han-feng1; HUANG Shi-kuan1; CHEN Zhi-ping1; LIAO Qing-zhou2; TAN Qi-lin3; WANG Yun-hua3   

  1. 1Ezhou University, Ezhou 436000, Hubei, China;2Ezhou Soil and Fertilizer Station, Ezhou 436000, Hubei, China;3College of Resource and Environment, Huazhong Agricultural University, Wuhan 430070, China
  • Received:2006-04-05 Revised:1900-01-01 Online:2007-04-03 Published:2007-04-03

摘要: 采用野外测定结合室内分析的方法,探讨了梁子湖湿地植物对氮磷的积累特征。结果表明,湿地不同植物种类对氮磷的积累特征明显不同。浮游植物积累各种营养物质量最多,其体内全氮量平均为29.07 g·kg-1,全磷量平均为9.53 g·kg-1。梁子湖湿地各类植物氮磷含量的大小依次为浮游植物>浮叶植物>沉水植物>水稻>挺水植物。各类植物中氮磷积累的大小依次为浮叶植物>挺水植物>沉水植物>沼泽植物>水稻。梁子湖湿地水生植物氮磷营养元素的吸收系数大于湿生植物,各类植物氮元素的吸收系数均大于磷。

关键词: 集约化种植体系, 氮素平衡, 土壤硝酸盐累积, 地下水, 硝酸盐污染

Abstract: Different plant species in Liangzi Lake wetland had different accumulation features of nitrogen and phosphorous. Floating-leaved macrophyte accumulated the largest amount of nutrients, with an average content of total nitrogen and phosphorus being 29.07 and 9.53 g·kg-1, respectively. The plant nitrogen and phosphorus contents were in the order of phytoplankton>floating-leaved macrophyte>submersed macrophyte>rice>emerged macrophyte. The nitrogen and phosphorus accumulation in plant was in the order of floating-leaved macrophyte>emerged macrophyte>submersed macrophyte>swamp plant>rice. Hydrophyte could absorb more nitrogen and phosphorus, and the nitrogen absorption by various kinds of plant in the wetland was greater than that of phosphorus absorption.

Key words: Intensive cropping systems, Nitrogen budget, Nitrate accumulation in soil, Groundwater, Nitrate contamination