Samavati, M., Hosseinpur, A. (2007). Phosphorus Fractions in Selected Soils of Hamedan Province and Their Correlation with Available Phosphorus. , 20(2), 225-236. doi: 10.22092/ijsr.2007.127203
M. Samavati; A. R. Hosseinpur. "Phosphorus Fractions in Selected Soils of Hamedan Province and Their Correlation with Available Phosphorus". , 20, 2, 2007, 225-236. doi: 10.22092/ijsr.2007.127203
Samavati, M., Hosseinpur, A. (2007). 'Phosphorus Fractions in Selected Soils of Hamedan Province and Their Correlation with Available Phosphorus', , 20(2), pp. 225-236. doi: 10.22092/ijsr.2007.127203
Samavati, M., Hosseinpur, A. Phosphorus Fractions in Selected Soils of Hamedan Province and Their Correlation with Available Phosphorus. , 2007; 20(2): 225-236. doi: 10.22092/ijsr.2007.127203

Phosphorus Fractions in Selected Soils of Hamedan Province and Their Correlation with Available Phosphorus

پژوهش های خاک
Volume 20, Issue 2, February 2007, Pages 225-236    PDF (258.44 K)
Document Type: Research Paper
DOI: 10.22092/ijsr.2007.127203
Authors
M. Samavati1; A. R. Hosseinpur* 2
1Former: Ms. Student & Associ
2Prof. Respectively, Soil Sci. Dept. Bu-Ali Sina Univ
Abstract
Determination of forms of soil phosphorus (P) is important in the evaluation of soil P status. Amount and distributions of soil organic and inorganic P fractions were examind in 53 soil samples of Hamedan province. Soils were sequentially extracted to determine organic and inorganic P fractions. Inorganic P was divided in to 6 fractions: Dicalcium phosphate (Ca2-P), Octacalcium phosphate (Ca8-P), Apatit (Ca10-P), P absorbed by Al oxides (Al-P), P absorbed by Fe oxides (Fe-P) and Occluded P ( O-P). The results showed that wide range in content of P fraction. The amount of total P (TP) ranged from 926 to 2686 mg kg-1 with an average of 1533 mg kg-1 soil. Calcium phosphate (Ca2-P + Ca8-P + Ca10-P) ranged from 104 to 1872 mg kg-1 with an average of 801 mg kg-1 soil and being comprised of 78.5 and 52.3% inorganic and total P respectively. The amount of Fe-P ranged from 1 to 185 mg kg-1 with an average of 59  mg kg-1 soil and being comprised of 5.8 and 3.8% inorganic and total P respectively. The amount of Al-P ranged from 4.6 to 523 mg kg-1 with an average of 128 mg kg-1 soil and being comprised of 12.5 and 8.3% inorganic and total P respectively. The amount of O-P ranged from 0.0 to 371 mg kg-1 with an average of 33 mg kg-1 soil and being comprised of 3.2 and 2.2% inorganic and total P respectively. The amount of organic P ranged from 75 to 676 mg kg-1 with an average of 277 mg kg-1 soil and being comprised of 18.1% total P. The results of correlation study showed that available P (P extracted by Olsen method) was significantly correlated with Ca2-P, Ca8-P, Al-P, Calcium phosphate  (Ca2-P + Ca8-P + Ca10-P) and (Aluminum, Iron oxide: Al-Fe-P), This result indicate that these fractions probably can be used by plant.
Keywords
Phosphate; Fractionation; Lime soils; Hamedan
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