Changes of soil phosphorus speciation along a 120-year soil chronosequence in the Hailuogou Glacier retreat area (Gongga Mountain, SW China)

Geoderma ◽  
2013 ◽  
Vol 195-196 ◽  
pp. 251-259 ◽  
Author(s):  
Jun Zhou ◽  
Yanhong Wu ◽  
Jörg Prietzel ◽  
Haijian Bing ◽  
Dong Yu ◽  
...  
Keyword(s):  
Soil Phosphorus ◽  
Glacier Retreat ◽  
Phosphorus Speciation ◽  
Sw China ◽  
Soil Chronosequence ◽  
Gongga Mountain

scholarly journals Rapid loss of phosphorus during early pedogenesis along a glacier retreat choronosequence, Gongga Mountain (SW China)

PeerJ ◽  
2015 ◽  
Vol 3 ◽  
pp. e1377 ◽  
Author(s):  
Yanhong Wu ◽  
Jun Zhou ◽  
Haijian Bing ◽  
Hongyang Sun ◽  
Jipeng Wang
Keyword(s):  
Plant Biomass ◽  
Glacier Retreat ◽  
Inorganic P ◽  
Sw China ◽  
Soil Chronosequence ◽  
Gongga Mountain ◽  
P Loss ◽  
Hedley Fractionation ◽  
Ecosystem Level ◽  
Stock Depletion

The loss of phosphorus (P) during the early pedogenesis stage is important at the ecosystem level, and it also plays an important role in the global P cycle. The seasonal variation of total P (Pt) and its fractions along a young soil chronosequence (Hailuogou chronosequence) on the eastern slope of Gongga Mountain, SW China, was investigated based on the modified Hedley fractionation technique to understand P loss during the early pedogenesis stage. The results showed that the mineral P (mainly apatite) was the dominant fraction of Pt in the C horizon of the soil, and the seasonal difference in Pt and its fractions was insignificant. In the A horizon, Pt concentrations decreased markedly compared with those in the C horizon, and as the age of the soil increased, the inorganic P (Pi) significantly decreased and the organic P (Po) prominently increased. Seasonally, the P fractions exhibited various distributions in the A horizon. The variation of Pt and its fractions revealed that the P loss was rapid along the 120-year soil chronosequence. The P stocks in soils (0–30 cm) started to decrease at the 52 year site. And the P stock depletion reached almost 17.6% at the 120-year site. The loss of P from the soil of the Hailuogou chronosequence was mainly attributed to weathering, plant uptake, and transport by runoff. About 36% P loss was transported into plant biomass P at the 120 year site. The data obtained indicated that the glacier retreat chronosequence could be used to elucidate the fast rate of P loss during the early pedogenic stage.

scholarly journals Rapid loss of phosphorus during early pedogenesis along a glacier retreat choronosequence, Gongga Mountain (SW China)

2015 ◽  
Author(s):  
Yanhong Wu ◽  
Jun Zhou ◽  
Haijian Bing ◽  
Hongyang Sun ◽  
Jipeng Wang
Keyword(s):  
Glacier Retreat ◽  
Inorganic P ◽  
Sw China ◽  
Soil Chronosequence ◽  
Gongga Mountain ◽  
P Loss ◽  
Hedley Fractionation ◽  
Ecosystem Level ◽  
Total P ◽  
P Cycle

The loss of phosphorus (P) during the early pedogenesis stage is important at the ecosystem level, and it also plays an important role in the global P cycle. The seasonal variation of total P (Pt) and its fractions along a young soil chronosequence (Hailuogou chronosequence) on the eastern slope of Gongga Mountain, SW China, was investigated based on the modified Hedley fractionation technique to understand P loss during the early pedogenesis stage. The results showed that the mineral P (mainly apatite) was the dominant fraction of Pt in the C horizon of the soil, and the seasonal difference in Pt and its fractions was insignificant. In the A horizon, Pt concentrations decreased markedly compared with those in the C horizon, and as the age of the soil increased, the inorganic P (Pi) significantly decreased and the organic P (Po) prominently increased. Seasonally, the P fractions exhibited various distributions in the A horizon. The variation of Pt and its fractions revealed that the P loss was rapid along the 120-year soil chronosequence. The concentrations of Pt in the original minerals decreased more than 50% in the 52 years since the glacier retreated, and the depletion reached almost 80% at the 120-year pedogenesis. The loss of P from the soil of the Hailuogou chronosequence was mainly attributed to weathering, plant uptake, and transport by runoff. The data obtained indicated that the glacier retreat chronosequence could be used to elucidate the fast rate of P loss during the early pedogenesis stage.

scholarly journals Rapid loss of phosphorus during early pedogenesis along a glacier retreat choronosequence, Gongga Mountain (SW China)

2015 ◽  
Author(s):  
Yanhong Wu ◽  
Jun Zhou ◽  
Haijian Bing ◽  
Hongyang Sun ◽  
Jipeng Wang
Keyword(s):  
Glacier Retreat ◽  
Inorganic P ◽  
Sw China ◽  
Soil Chronosequence ◽  
Gongga Mountain ◽  
P Loss ◽  
Hedley Fractionation ◽  
Ecosystem Level ◽  
Total P ◽  
P Cycle

The loss of phosphorus (P) during the early pedogenesis stage is important at the ecosystem level, and it also plays an important role in the global P cycle. The seasonal variation of total P (Pt) and its fractions along a young soil chronosequence (Hailuogou chronosequence) on the eastern slope of Gongga Mountain, SW China, was investigated based on the modified Hedley fractionation technique to understand P loss during the early pedogenesis stage. The results showed that the mineral P (mainly apatite) was the dominant fraction of Pt in the C horizon of the soil, and the seasonal difference in Pt and its fractions was insignificant. In the A horizon, Pt concentrations decreased markedly compared with those in the C horizon, and as the age of the soil increased, the inorganic P (Pi) significantly decreased and the organic P (Po) prominently increased. Seasonally, the P fractions exhibited various distributions in the A horizon. The variation of Pt and its fractions revealed that the P loss was rapid along the 120-year soil chronosequence. The concentrations of Pt in the original minerals decreased more than 50% in the 52 years since the glacier retreated, and the depletion reached almost 80% at the 120-year pedogenesis. The loss of P from the soil of the Hailuogou chronosequence was mainly attributed to weathering, plant uptake, and transport by runoff. The data obtained indicated that the glacier retreat chronosequence could be used to elucidate the fast rate of P loss during the early pedogenesis stage.

scholarly journals CO2 and N2O emissions in a soil chronosequence at a glacier retreat zone in Maritime Antarctica

2015 ◽  
Vol 521-522 ◽  
pp. 336-345 ◽  
Author(s):  
A. Thomazini ◽  
E.S. Mendonça ◽  
D.B. Teixeira ◽  
I.C.C. Almeida ◽  
N. La Scala ◽  
...  
Keyword(s):  
Glacier Retreat ◽  
N2o Emissions ◽  
Maritime Antarctica ◽  
Soil Chronosequence

scholarly journals Optimization of Data Processing Minimizes Impact of Self-Absorption on Phosphorus Speciation Results by P K-Edge XANES

Soil Systems ◽  
2019 ◽  
Vol 3 (3) ◽  
pp. 61 ◽  
Author(s):  
Carlos ◽  
Francisco ◽  
Wedisson ◽  
Leonardus ◽  
Jörg ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Data Processing ◽  
Soil Sample ◽  
Soil Phosphorus ◽  
Fluorescence Yield ◽  
Natural Environments ◽  
Phosphorus Speciation ◽  
Soil P ◽  
Wide Range ◽  
Calcium Iron

Bulk soil phosphorus speciation by X-ray absorption spectroscopy (XAS) using fluorescence yield-mode measurements is an important tool for phosphorus research because of the low soil P contents. However, when measuring in fluorescence mode, increasing the concentration of the absorbing atom can dampen the XAS spectral features because of self-absorption and affect the linear combination (LC) fitting results. To reduce the self-absorption for samples of high P contents, thick boron nitride diluted samples are produced, yet the effects of self-absorption on P speciation results via LC fitting of P K-edge XANES spectroscopy, and the possible benefits of data processing optimization are unknown. Toward this end, we produced a series of ternary standard mixtures (calcium-iron-aluminum phosphates) and an example soil sample both diluted using boron nitride over a range from 1 to ~900 mmol kg−1 for the soil sample and up to ~6000 mmol kg−1 for the standard mixture. We show that by optimizing background subtraction and normalization values, consistent results with less than 10% error can be obtained for samples with up to 300 mmol kg−1 P. Our results highlight the applicability of optimized P K-edge XANES fitting across a wide range of concentrations encountered in natural environments.

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