Document Detail

Soil phosphorus forms and their variations in selected paddy soils of Iran.
MedLine Citation:
PMID:  23616078     Owner:  NLM     Status:  Publisher    
Fractionation of soil phosphorus (P) can provide useful information for assessing the risk of soil P as the potential sources of eutrophication in aquatic systems. Little information exists on P forms in paddy soils of Isfahan Province in central Iran, where P fertilizers have been continuously applied for at least 45 years. The objectives of this study were to investigate concentrations and proportions of P forms in paddy soils and correlate the content of P forms with basic soil properties. Soil samples from three paddy sites were obtained, and soil P forms were determined by a modified Hedley fraction method. Results show that the total P concentrations ranged from 288 to 850 mg kg(-1) and were enriched in site 1. In all sites, the rank order of P fractions was HCl-P (CARB-P) > residual-P (RES-P) > NaOH-P (Fe-Al-P) > KCl-P (EXCH-P), indicating that Ca compounds are the main soil components contributing to P retention in these calcareous paddy soils. The EXCH-P represented on average < 1 % of the total P, while the Fe-Al-P ranged 3.3-18 %. The CARB-P showed considerable contribution (63.6-85.6 %) to the total P. The Pearson correlation matrix indicated that Fe-Al-P only was positively correlated with total P, but did not show any significant correlations with other soil geochemical properties. Calcium-bound P fraction was significantly correlated with the clay, silt, cation exchange capacity, and total P.
Mohsen Jalali; Narges Hemati Matin
Related Documents :
10913978 - Characterization of subterranean bacteria in the hungarian upper permian siltstone (ale...
18587948 - Thermophilic semisolid anaerobic digestion of municipal refuses.
18553828 - Thermophilic anaerobic digestion of high strength wastewaters.
16055328 - Anaerobic and complementary treatment of domestic sewage in regions with hot climates--...
24694828 - The potential roles of strigolactones and brassinosteroids in the autoregulation of nod...
21512748 - Behavioral responses of the iberian waterfrog, pelophylax perezi (seoane, 1885), to thr...
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-4-25
Journal Detail:
Title:  Environmental monitoring and assessment     Volume:  -     ISSN:  1573-2959     ISO Abbreviation:  Environ Monit Assess     Publication Date:  2013 Apr 
Date Detail:
Created Date:  2013-4-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8508350     Medline TA:  Environ Monit Assess     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Department of Soil Science, College of Agriculture, Bu-Ali Sina University, Hamadan, Iran,
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Caught in the act: revealing the metastatic process by live imaging.
Next Document:  Application of thresholds of potential concern and limits of acceptable change in the condition asse...