scholarly journals Phosphorus saturation of Finnish soils: evaluating an easy oxalate extraction method

2000 ◽  
Vol 9 (1) ◽  
pp. 61-70 ◽  
Author(s):  
R. UUSITALO ◽  
H.-R. TUHKANEN
Keyword(s):  
Clay Content ◽  
P Fractions ◽  
Runoff Water ◽  
Inorganic P ◽  
P Concentration ◽  
Extractable P ◽  
Inorganic P Fractions ◽  
Phosphorus Saturation ◽  
Labile P ◽  
Oxalate Extraction

The aim of this study was to test whether phosphorus saturation of surface sorption sites of (oxyhydr)oxides of aluminium (Al) and iron (Fe) in Finnish soils can be assessed using a single oxalate extraction and, if so, whether the results are closely related to the P forms likely to influence the P concentration in runoff waters. Ten soil samples with varying clay content and P status were studied. Desorption tests were conducted by submitting the soils sequentially to nine anion exchange resin (AER) extractions. Sorption of P was studied by shaking the soils in P standard solutions (0-250 ppm). Soil inorganic P was characterised by sequentially extracting P from the fractions assumed to be connected to Al and Fe compounds and present as the stable apatitic form. The desorption studies and the fractioning of inorganic P suggested that oxalate solution dissolves apatitic P and/or other relatively stable P-bearing compounds, probably referring to the sum of inorganic P fractions rather than labile P. The amount of P desorbed in the nine AER extractions was about 80-280 mg/kg, whereas oxalate extracted about 490-1100 mg P/kg, which approximated the sum of the inorganic P fractions. Therefore, in soils high in apatitic P, oxalate-extractable P does not seem to be a reliable measure of the P saturation of Al and Fe oxide surfaces that regulate the P concentration in soil solution and runoff water.;

scholarly journals Effect of cumulative fertilizer dressings on the phosphorus status of mineral soils I Changes in inorganic phosphorus fractions

1989 ◽  
Vol 61 (2) ◽  
pp. 55-59 ◽  
Author(s):  
Helinä Hartikainen
Keyword(s):  
Inorganic Phosphorus ◽  
Soluble Form ◽  
P Fertilization ◽  
P Fractions ◽  
Inorganic P ◽  
Extractable P ◽  
Inorganic P Fractions ◽  
Phosphorus Status ◽  
Mineral Soils ◽  
Inorganic Phosphorus Fractions

Surface soil samples were collected from 16 P fertilization trials before onset of the experiments and after seven years of cultivation. The changes in the inorganic P fractions were investigated in plots amended annually with 0, 30 or 60 kg of P ha-1. In the clay soils, cultivation without P fertilization depleted the NH4F-extractable and NaOH-extractable P reserves by 22—69 kg ha-1 ; in the coarser soils, the respective depletion was 8—140 kg ha-1. H2S04-soluble P decreased in seven soils by 16—34 kg ha-1. In the plots amended totally with 210 or 420 kg of P ha-1, on the other hand, these P fractions increased by 24—174 and 46—368 kg ha-1, respectively. The higher the P dressing was, the more the added P tended to accumulate in the fluoride-soluble form as compared to the alkali-soluble form.

scholarly journals Influence of Application of Organic Residues of Different Biochemical Quality on Phosphorus Fractions in a Tropical Sandy Soil

Agronomy ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 248
Author(s):  
Tanabhat-Sakorn Sukitprapanon ◽  
Metawee Jantamenchai ◽  
Duangsamorn Tulaphitak ◽  
Nattaporn Prakongkep ◽  
Robert John Gilkes ◽  
...  
Keyword(s):  
Leaf Litter ◽  
Sandy Soil ◽  
Organic Residue ◽  
Residue Quality ◽  
Organic Residues ◽  
P Fractions ◽  
Residual P ◽  
Extractable P ◽  
P Fraction ◽  
Labile P

Understanding phosphorus (P) dynamics in tropical sandy soil treated with organic residues of contrasting quality is crucial for P management using organic amendments. This research determined P fractions in a tropical sandy soil under the application of organic residues of different quality, including groundnut stover (GN), tamarind leaf litter (TM), dipterocarp leaf litter (DP), and rice straw (RS). The organic residues were applied at the rate of 10 t DM ha−1 year−1. The P fractions were examined by a sequential extraction procedure. Organic residue application, regardless of residue quality, resulted in P accumulation in soils. For unamended soil, 55% of total P was mainly associated with Al (hydr)oxides. Organic residue application, regardless of residue quality, diminished the NH4F-extractable P (Al-P) fraction, but it had a nonsignificant effect on NaOH-extractable P (Fe-P). The majority of Al-P and Fe-P fractions were associated with crystalline Al and Fe (hydr)oxides. NH4Cl-extractable P (labile P), NaHCO3-extractable P (exchangeable P and mineralizable organic P), HCl-extractable P (Ca-P), and residual P fractions in soil were significantly increased as a result of the incorporation of organic residues. The application of organic residues, particularly those high in ash alkalinity, increase soil pH, labile P, and Ca-P fractions. In contrast, applications of residues high in lignin and polyphenols increase residual P fraction, which is associated with organo-mineral complexes and clay mineral kaolinite.

Dynamics of phosphorus fractions in soils treated with dairy manure

Soil Research ◽  
2020 ◽  
Vol 58 (3) ◽  
pp. 289
Author(s):  
L. B. Braos ◽  
A. C. T. Bettiol ◽  
L. G. Di Santo ◽  
M. E. Ferreira ◽  
M. C. P. Cruz
Keyword(s):  
P Uptake ◽  
Dairy Manure ◽  
P Availability ◽  
Organic P ◽  
Triple Superphosphate ◽  
P Fractions ◽  
Inorganic P ◽  
Soil P ◽  
Plant P Uptake ◽  
Inorganic P Fractions

The evaluation of phosphorus (P) transformations in soil after application of manure or mineral P can improve soil management and optimise P use by plants. The objectives of the present study were to assess organic and inorganic P forms in two soils treated with dairy manure and triple superphosphate and to establish relationships between soil P fraction levels and P availability. Soil organic and inorganic P fractions were quantified using a pot experiment with two soils, a typical Hapludox and an arenic Hapludult, with three types of fertiliser treatments applied (no fertiliser application, application of dairy manure, and application of triple superphosphate, by adding 100 mg P dm–3 in the form of fertiliser in the two latter treatments) and four incubation times (15, 45, 90, and 180 days). Inorganic P was fractionated into aluminium-bound, iron-bound, occluded, and calcium-bound P. Organic P was extracted sequentially using sodium bicarbonate, hydrochloric acid, microbial biomass, sodium hydroxide, and residual organic P. After incubation, maize plants were cropped to quantify dry matter yield and absorbed P. Application of dairy manure resulted in a significant increase in most of the organic P fractions, and application of triple superphosphate led to a significant increase in inorganic P fractions. Both fertilisers raised labile organic P fractions in the two soils. The major sinks of P in Hapludox were occluded and fulvic acid-associated P. In contrast, the major sink of P in Hapludult was iron-bound P. The available P levels were stable after application of dairy manure, and decreased with time when fertilised with triple superphosphate. In the Hapludox, the organic P fractions had a significant positive correlation with P uptake by plants. The results suggest that organic P mineralisation plays a more significant role in plant P uptake in the Hapludox soil and inorganic P forms are the main contributors to plant P uptake in the Hapludult soil.

LABILE RESIDUAL FERTILIZER PHOSPHORUS IN CHERNOZEMIC SOILS. I. SOLUBILITY AND QUANTITY/INTENSITY STUDIES

1977 ◽  
Vol 57 (1) ◽  
pp. 65-73 ◽  
Author(s):  
J. M. SADLER ◽  
J. W. B. STEWART
Keyword(s):  
Solubility Product ◽  
Monoammonium Phosphate ◽  
Inorganic P ◽  
Residual P ◽  
Phosphate Dihydrate ◽  
P Concentration ◽  
Aluminum Iron ◽  
Labile P ◽  
P Addition ◽  
Soil Interface

Granular monoammonium phosphate (500 μg P/g soil) was applied in the field to three soils of an Oxbow catena. Changes in the inorganic P forms controlling P concentration or intensity (Ie) in soil solution during the ensuing 2½ yr were determined by equilibrium solubility product and related quantity/intensity analyses. In the Calcareous and Orthic control soils, Ie was controlled by impure hydroxyapatite. After P addition, it was controlled by dicalcium phosphate dihydrate and octocalcium phosphate. Marked changes in the quantity of labile P caused negligible changes in values for Ie. Therefore, in these and similar Chernozemic soils, Ie should adequately reflect the availability of residual P to plants. In the Gleysol after P addition, Ie was determined by adsorbed P or by the solubility of aluminum/iron-bound P forms. For this and similar Chernozemic soils, the quantity/intensity data indicated that estimates of the availability of residual P will require a measurement of its capacity to maintain Ie at the root–soil interface against depletion by plant uptake rather than a measurement of Ie alone.

Phosphorus sorption-desorption by some sediments of the Johnstone Rivers catchment, northern Queensland

1992 ◽  
Vol 43 (6) ◽  
pp. 1535 ◽  
Author(s):  
C Pailles ◽  
PW Moody
Keyword(s):  
Equilibrium Solution ◽  
Buffer Capacity ◽  
Sea Water ◽  
Phosphorus Sorption ◽  
Constant Amount ◽  
Inorganic P ◽  
P Sorption ◽  
P Concentration ◽  
Extractable P ◽  
Water Columns

Phosphorus (P) sorption-desorption characteristics were determined for 11 sediments from the Johnstone Rivers catchment, northern Queensland. Sediments were selected to cover a range in values of Bray extractable P from 0.1 to 10.4 mg P kg-1. P sorption curves were determined by using 0.01 M NaCl to simulate fluvial water conditions and, on a restricted number of sediments, 0.5 M NaCl to simulate sea water. The amounts of P released in 10 successive extractions for 30 min with 0.01 M CaCl2 were determined for each sediment. The amounts of P desorbed either declined to nondetectable levels or declined to a constant amount. These desorption curves were used to delineate 'rapidly desorbable' P from 'slowly desorbable' P. Bray extractable P and adsorption characteristics (equilibrium solution P concentration and P buffer capacity) were poorly correlated with 'rapidly desorbable' P. Most sediments in the suite would act as P sinks in both fluvial and marine environments because their equilibrium P concentrations are lower than the dissolved inorganic P concentrations of their respective water columns. For those sediments acting as potential sources (5 from 11 in 0.01 M NaC1, 2 from 6 in 0.5 M NaCl), amounts of P that could potentially be desorbed into the fluvial water column ranged from 0.1 to 3.9 mg P kg-1 sediment.

scholarly journals Distribution Changes of Phosphorus in Soil–Plant Systems of Larch Plantations across the Chronosequence

Forests ◽  
2018 ◽  
Vol 9 (9) ◽  
pp. 563 ◽  
Author(s):  
Fanpeng Zeng ◽  
Xin Chen ◽  
Bin Huang ◽  
Guangyu Chi
Keyword(s):  
N:P Ratio ◽  
Stand Age ◽  
P Fractions ◽  
The Sustainable Development ◽  
Soil P ◽  
P Concentration ◽  
Use Efficiency ◽  
Labile P ◽  
Systematic Knowledge

Phosphorus (P) is one of the most important factors influencing the growth and quality of larch plantations. A systematic knowledge of the dynamic changes of P in soil–plant systems can provide a theoretical basis for the sustainable development of larch plantations. We determined the concentration, biomass, and accumulation of P in five tree components (i.e., leaf, branch, bark, stem, and root), and the concentrations of various soil P fractions of larch plantations in 10-, 25-, and 50-year-old stands in northeast China. Our results showed that the N:P ratio and P concentration in leaves increased with stand age, indicating that the growth of larch plantations might be limited by P in the development of stands. The N:P ratio and P concentration in roots, and P resorption efficiency, increased with stand age, indicating the use efficiency of P could be enhanced in older stands. The concentrations of soil-labile P fractions (Resin-P, NaHCO3-Pi, and NaHCO3-Po) in 25- and 50-year-old stands were significantly lower than those in 10-year-old stands, indicating the availability of soil P decreases with the development of larch plantations.

Soil P availability, inorganic P fractions and yield effect in a calcareous soil with plastic-film-mulched spring wheat

2012 ◽  
Vol 137 ◽  
pp. 221-229 ◽  
Author(s):  
Bin Hu ◽  
Yu Jia ◽  
Zhi-hong Zhao ◽  
Feng-min Li ◽  
Kadambot H.M. Siddique
Keyword(s):  
Spring Wheat ◽  
Calcareous Soil ◽  
P Availability ◽  
Plastic Film ◽  
P Fractions ◽  
Inorganic P ◽  
Soil P ◽  
Soil P Availability ◽  
Inorganic P Fractions

scholarly journals Use of near-infrared spectroscopy to assess phosphorus fractions of different plant availability in forest soils

2015 ◽  
Vol 12 (11) ◽  
pp. 3415-3428 ◽  
Author(s):  
J. Niederberger ◽  
B. Todt ◽  
A. Boča ◽  
R. Nitschke ◽  
M. Kohler ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Forest Soils ◽  
Soil Type ◽  
Near Infrared ◽  
Soil Samples ◽  
P Fractions ◽  
Inorganic P ◽  
Plant Availability ◽  
Inorganic P Fractions

Abstract. The analysis of soil phosphorus (P) in fractions of different plant availability is a common approach to characterize the P status of forest soils. However, quantification of organic and inorganic P fractions in different extracts is labor intensive and therefore rarely applied for large sample numbers. Therefore, we examined whether different P fractions can be predicted using near-infrared spectroscopy (NIRS). We used the Hedley sequential extraction method (modified by Tiessen and Moir, 2008) with increasingly strong extractants to determine P in fractions of different plant availability and measured near-infrared (NIR) spectra for soil samples from sites of the German forest soil inventory and from a nature reserve in southeastern China. The R2 of NIRS calibrations to predict P in individual Hedley fractions ranged between 0.08 and 0.85. When these fractions were combined into labile, moderately labile and stable P pools, R2 of calibration models was between 0.38 and 0.88 (all significant). Model prediction quality was higher for organic than for inorganic P fractions and increased with the homogeneity of soil properties in soil sample sets. Useable models were obtained for samples originating from one soil type in subtropical China, whereas prediction models for sample sets from a range of soil types in Germany were only moderately useable or not useable. Our results indicate that prediction of Hedley P fractions with NIRS can be a promising approach to replace conventional analysis, if models are developed for sets of soil samples with similar physical and chemical properties, e.g., from the same soil type or study site.

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