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水稻土对有机、无机磷吸附解吸的特征(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2010年02期
Page:
129-132
Column:
研究简报
publishdate:
2010-03-30

Article Info:/Info

Title:
The characteristic on adsorptiondesorption of organic and inorganic phosphorus in paddy soils
Author(s):
JIA Xueping123 LIU Qin1* ZHANG Huanchao3 YUAN Manman1 ZHU Qianggen3
1.Institute of Soil Science, CAS, Nanjing 210008, China; 2.Chuzhou Soil and Fertilizer Station of Anhui Province, Chuzhou 239001, China; 3.College of Forest Resources and Environment, Nanjing Forestry University, Nanjing 210037, China
Keywords:
organic phosphorus inorganic phosphorus adsorption desorption ionic strength paddy soil
Classification number :
S714
DOI:
10.3969/j.jssn.1000-2006.2010.02.030
Document Code:
A
Abstract:
The adsorption and desorption of organic and inorganic phosphorus in the three types of paddy soils were studied in the lab experiments. The results showed that the maximum adsorption capacity both to monopotassium phosphate and inositol hexaphosphate from big to small were: red loam soil, stagnic anthrosols, loamy sand soil, and adsorption capacity of organic phosphorus was larger than that of inorganic phosphorus. The adsorption of organic and inorganic phosphorus could be fitted well by equations of Langmuir, Freundlich and Temkin. The Langmuir equation was the best for the fit of inorganic phosphorus adsorption. The Temkin equation was the best for the fit of organic phosphorus adsorption. The desorption of organic and inorganic phosphorus correlate exponentially with the adsorpted phosphorus. The desorbed phosphorus from big to small was loamy sand soil, stagnic anthrosols, red loam soil. The adsorption was affected by the ionic strength of the sorption solutions.

References

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Last Update: 2010-05-14