scholarly journals A Study on the Distribution of Inorganic P Fractions in Soils of Low and High Available Phosphorus through a Laboratory Incubation Experiment

2017 ◽  
Vol 6 (3) ◽  
pp. 929-937
Author(s):  
C. Jemila B. Bakiyathu Saliha ◽  
S. Udayakumar
Keyword(s):  
Available Phosphorus ◽  
Incubation Experiment ◽  
P Fractions ◽  
Inorganic P ◽  
Laboratory Incubation ◽  
Inorganic P Fractions

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.

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 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 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 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.

scholarly journals Inorganic P fractionation in Shrink-swell soils of Central India: A case study

Agropedology ◽  
2019 ◽  
Vol 27 (2) ◽  
Author(s):  
Vijay R. Jadhav ◽  
◽  
K. Karthikeyan ◽  
Keyword(s):  
Organic Carbon ◽  
Central India ◽  
Significant Negative Correlation ◽  
P Fractions ◽  
P Fractionation ◽  
Inorganic P ◽  
Soil P ◽  
Inorganic P Fractions ◽  
The Relationship

Inorganic P fractions in shrink-swell soils representing six soil series of Adan river basin, Darwha tehsil, Yavatmal district, Maharashtra were studied to understand the relationship between the P fractions and soil properties. These clayey soils were neutral to strongly alkaline (pH 6.70 – 9.34), calcareous and low to medium in organic carbon. The sequential extraction of inorganic soil P fractions indicated relative abundance as Ca2-P<Fe-P<Al-P<O-P<Ca8-P<Ca10-P. The plant available forms of P (Ca2-P, Al-P and Fe-P) contributed nearly 10 per cent of total inorganic P while the rest was in unavailable forms. The correlation matrix indicated that plant available forms of P had significant negative correlation with soil pH, EC and CaCO3 and significant positive correlation with organic carbon. The P fractions showed significant correlation among each other which implies that available P forms are constantly replenished by other forms of P pools in the soils.

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

2015 ◽  
Vol 12 (1) ◽  
pp. 555-592
Author(s):  
B. Todt ◽  
J. Niederberger ◽  
A. Boča ◽  
R. Nitschke ◽  
M. Kohler ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Forest Soils ◽  
Near Infrared ◽  
Eastern China ◽  
Soil Samples ◽  
P Fractions ◽  
Inorganic P ◽  
Plant Availability ◽  
Inorganic P Fractions

Abstract. The fractionation of soil P into 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 labour-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 method with increasingly strong extractants to determine P in fractions of different plant availability and measured NIR spectra for soil samples from sites of the German forest soil inventory and from a nature reserve in south-eastern China. The R2 of NIRS calibrations to predict P in individual Hedley fractions ranged between 0.08 and 0.85. When these were pooled into labile, moderately labile and stable fractions, R2 of calibration models was between 0.38 and 0.88. Model prediction quality was higher for organic than for inorganic P fractions and increased with the homogeneity of soil sample sets. Useful 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 useful or not useful. Our results indicate that prediction of Hedley P fractions with NIRS is a promising approach to replace conventional analysis, if models are developed for sets of soil samples with similar physical and chemical properties.

Sign in / Sign up

Export Citation Format

Share Document