Subscribe Now Subscribe Today
Science Alert
 
Blue
   
Curve Top
International Journal of Agricultural Research
  Year: 2012 | Volume: 7 | Issue: 8 | Page No.: 388-397
DOI: 10.3923/ijar.2012.388.397
 
Facebook Twitter Digg Reddit Linkedin StumbleUpon E-mail

Characterization of Some Representative Calcareous Soils of Bangladesh with Respect to Soil Phosphorus Requirements

Mohammad Z. Afsar and Mohammad Enayet Hossain

Abstract:
Phosphate sorption equations have been widely used to characterize soils with respect to their phosphorus requirements (Preq). For the sorption study, the soils were equilibrated with 0.01 M CaCl2 solution containing graded concentrations of phosphate (0, 1, 10, 25, 50, 100 and 150 mg P L-1). The Preq values of four calcareous soils were determined from the Langmuir, Freundlich and Temkin equations. The Langmuir equation was best fitted to the P sorption data. Among the four soil series, the Ghior soil series occupying the lowest position of catena sorbed the highest amount of phosphate. The amounts of sorbed P maintaining 0.2 mg P L-1 in soil solution ranged from 14.14 to 33.56, 27.99 to 45.80 and 16.16 to 51.72 mg kg-1 soil which were derived from the respective Langmuir, Freundlich and Temkin equations. Preq values derived from the Freundlich and the Langmuir equations were negatively correlated with Olsen-P content of the soil (r >-0.975, p<0.05). Again, Preq values determined from the Freundlich equation were positively correlated with percent clay content (r >0.901, p<0.05) of the soil. Phosphate was sorbed by the soils in the following order: Ghior>Ishurdi>Gopalpur>Sara soil series. However, based on their Preq values, the soils can be arranged in the following order: Ishurdi>Ghior>Gopalpur>Sara soil series. To maintain a desired P concentration in the soil solution, the Ishurdi soil will be required to supply more P than others.
PDF Fulltext XML References Citation Report Citation
 RELATED ARTICLES:
  •    A Comparison of the Langmuir, Freundlich and Temkin Equations to Describe Phosphate Sorption Characteristics of Some Representative Soils of Bangladesh
  •    Determining Phosphorus Adsorption Isotherm in Soil and its Relation to Soil Characteristics
  •    Determining of Soil Phosphorus Requirement with Application of Freundlich Adsorption Isotherm
How to cite this article:

Mohammad Z. Afsar and Mohammad Enayet Hossain, 2012. Characterization of Some Representative Calcareous Soils of Bangladesh with Respect to Soil Phosphorus Requirements. International Journal of Agricultural Research, 7: 388-397.

DOI: 10.3923/ijar.2012.388.397

URL: https://scialert.net/abstract/?doi=ijar.2012.388.397

COMMENT ON THIS PAPER
 
 
 

 

 
 
 
 
 
 
 
 
 

 
 
 
 
 
 
 
 

Curve Bottom