Identification and quantification of organic phosphorus forms in soils from fertility experiments

2013 ◽  
Vol 29 ◽  
pp. 24-35 ◽  
Author(s):  
J. Ahlgren ◽  
F. Djodjic ◽  
G. Börjesson ◽  
L. Mattsson
Keyword(s):  
Organic Phosphorus ◽  
Phosphorus Forms ◽  
Identification And Quantification

Phosphorus forms and enzymatic hydrolyzability of organic phosphorus in soils after 30 years of organic and conventional farming

2012 ◽  
Vol 175 (3) ◽  
pp. 385-393 ◽  
Author(s):  
Martina Keller ◽  
Astrid Oberson ◽  
Kathrin E. Annaheim ◽  
Federica Tamburini ◽  
Paul Mäder ◽  
...  
Keyword(s):  
Organic Phosphorus ◽  
Conventional Farming ◽  
Phosphorus Forms ◽  
Organic And Conventional Farming

Fractional Composition of Phosphorus Forms in Sediments Related to Release

1982 ◽  
Vol 14 (4-5) ◽  
pp. 215-226 ◽  
Author(s):  
H Furumai ◽  
S Ohgaki
Keyword(s):  
Fractional Composition ◽  
Organic Phosphorus ◽  
Aluminum Phosphate ◽  
Iron Phosphate ◽  
Phosphorus Release ◽  
Phosphorus Forms ◽  
P Fraction ◽  
Fractionation Method ◽  
Release Potential ◽  
Total Sediment

The relation between the fractional composition of phosphorus forms in sediment and phosphorus release was investigated experimentally using incubation bottles. The validity of the sediment phsophorus fractionation method developed in the field of soil science was examined and it proved to be successful for fractionation of pure phosphate compounds which were added to sediments. The iron and aluminum phosphate and adsorbed phosphorus were recovered in NaOH (lN) extractable ortho-phosphate (NaOH-o-P) fraction, calcium phosphate in HC1 (lN) extractable ortho-phosphate (HCl-o-P) fraction, and organic phosphorus in MaOH extractable total-phosphorus except for ortho-phosphate (NaOH-[T-o]-P) fraction and residual (Res.-P) fraction. This method was used to identify the form of phosphorus in sediments collected from a lake and a canal. NaOH-o-P fraction was the main phosphorus constituent in both sediments. The change in MaOH-o-P fraction accounted for most of the change in total sediment phosphorus. NaOH-o-P fraction in the sediment decreased during the period of incubation as the concentrations in the water increased but other fractions remained constant. The addition of iron phosphate and adsorbed phosphorus to the sediments promoted phosphorus release. Therefore, the changes in the fractional composition of the phosphorus forms indicated that NaOH-o-P fraction is the form of phosphorus which is most easily released under anaerobic condition. The amount of this fraction is the index of the phosphorus release potential of sediments.

Variation in Soil Phosphorus Forms in Larix olgensis Plantations in Eastern Montane Area of Northeast China

2012 ◽  
Vol 518-523 ◽  
pp. 4801-4805
Author(s):  
Li Xin Chen ◽  
Wen Biao Duan
Keyword(s):  
Rhizosphere Soil ◽  
Organic Phosphorus ◽  
Soil Phosphorus ◽  
Inorganic Phosphorus ◽  
Field Investigation ◽  
Stand Age ◽  
Available Phosphorus ◽  
Larix Olgensis ◽  
Phosphorus Forms ◽  
Mature Stand

Variation in total phosphorus (TP), available phosphorus (AP), the forms of organic phosphorus (OP) and inorganic phosphorus (IP) in rhizosphere soil (RS) and non-rhizosphere soil (NRS) at different development stages in larch (Larix olgensis) plantations was quantitively studied through field investigation, chemical analysis and statistical test. The results indicated that: AP, O-P (occluded phosphate), TP, OP in RS exhibited a significantly or apparently decreased tendency over stand age, but IP, Ca-P (phosphate combined with calcium) and Fe-P (phosphate combined with Ferrum) in RS presented a significantly or apparently increased trend when stand age increased; Ca-P in NRS increased when stand age became larger; Fe-P in half-mature stand (HMS), AP and Fe-P in near mature stand (NMS), AP and Ca-P in mature stand (MS) in NRS was higher than in RS

scholarly journals Organic phosphorus forms in a tropical sandy soil after application of organic residues of different quality

Geoderma ◽  
2022 ◽  
Vol 405 ◽  
pp. 115462
Author(s):  
Metawee Jantamenchai ◽  
Tanabhat-Sakorn Sukitprapanon ◽  
Duangsamorn Tulaphitak ◽  
Wanwimon Mekboonsonglarp ◽  
Patma Vityakon
Keyword(s):  
Sandy Soil ◽  
Organic Phosphorus ◽  
Organic Residues ◽  
Phosphorus Forms

Rates of Accumulation of Phosphorus Forms in Lake Erie Sediments

1976 ◽  
Vol 33 (3) ◽  
pp. 430-439 ◽  
Author(s):  
J. D. H. Williams ◽  
T. P. Murphy ◽  
T. Mayer
Keyword(s):  
Lake Erie ◽  
Organic Phosphorus ◽  
Sediment Cores ◽  
Inorganic Phosphorus ◽  
Sedimentation Rates ◽  
Overlying Water ◽  
Fine Grained ◽  
Phosphorus Forms ◽  
Rate Of Sedimentation ◽  
Total Sedimentation

Six Lake Erie sediment cores from locations of widely different sedimentation rates show that rate of input and sedimentation of apatite phosphorus at a given locality has been approximately constant during the last few hundred years relative to total sedimentation rate at the same locality. Apatite is not a significant source of soluble phosphorus for Lake Erie. By contrast, rate of sedimentation of nonapatite inorganic phosphorus (NAIP) and organic phosphorus has steadily increased in accordance with increased loadings in recent years of the source material, namely phosphorus of anthropogenic origin. The rate of sedimentation of these two forms of phosphorus at a given locality varied greatly within the lake, and was greatest where the most fine-grained sediments were accumulating. It was concluded that the sediments of Lake Erie contain sufficient orthophosphate-retaining sites to prevent major regeneration of phosphate under any conceivable condition provided the overlying water remains oxic.

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