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生态学杂志 ›› 2011, Vol. 30 ›› Issue (06): 1114-1118.

• 研究报告 • 上一篇    下一篇

泉州市不同利用方式下土壤磷的吸附与解吸特性

刘海婷,赵阳,于瑞莲**,胡恭任,谭城军   

  1. 华侨大学环境科学与工程系, 福建厦门 361021
  • 出版日期:2011-06-08 发布日期:2011-06-08

Soil phosphorus sorption-desorption characteristics under different land use in Quanzhou City, Fujian.

LIU Hai-ting, ZHAO Yang, YU Rui-lian**, HU Gong-ren, TAN Cheng-jun   

  1. Department of Environmental Science and Engineering, Huaqiao University, Xiamen 361021, Fujian, China
  • Online:2011-06-08 Published:2011-06-08

摘要: 分析了不同利用方式下泉州市土壤磷素吸附-解吸特征。结果表明:Langmuir等温方程式可以很好地表征土壤磷素的吸附特性;旱地和轮作地土壤对磷的吸附能力较强,而草地和林地土壤对磷的吸附能力较弱;磷的流失风险顺序为轮作地>草地>林地>旱地;指导施磷量与吸附常数、最大缓冲量的大小顺序一致,为旱地>轮作地>林地>草地;轮作地和草地的解吸率高于旱地和林地,土壤的缓冲能力顺序为旱地>林地>轮作地>草地。主成分分析表明,平均解吸率、易解吸磷、磷吸附指数和磷零吸持平衡浓度4个指标最能反映土壤磷素流失潜力,可作为评价流失潜力的主要指标。

关键词: 构件生长, 湿润度, 灰色关联

Abstract: Soil samples were collected from the rotation land, grassland, forestland, and dry land in Quanzhou City to study the soil phosphorus (P) sorption-desorption characteristics under different land use. Langmuir isotherm equation could well describe the soil P sorption characteristics. The soil P sorption capacity of rotation land and dryland was higher than that of grassland and forestland, and the soil P loss risk was in the order of rotation land > grassland > forestland > dry land. The soil P sorption constant and maximum buffering capacity were in the sequence of dry land > rotation land > forestland > grassland, and thereby, the recommended P application rate should be in accordance with the sequence. The soil P desorption rate of rotation land and grassland was higher than that of dry land and forestland, and the soil P buffering capacity was dry land > forestland > rotation land > grassland. Principal component analysis revealed that the mean P desorption rate, easily desorbable P, P sorption index, and equilibrium P concentration could best reflect the potential of soil P loss, and be used as the main indices to assess the potential of soil P loss.

Key words: Modular growth, Moisture, Grey correlation