Simultaneous Quantification of Soil Phosphorus Labile Pool and Desorption Kinetics Using DGTs and 3D-DIFS

2019 ◽  
Vol 53 (12) ◽  
pp. 6718-6728 ◽  
Author(s):  
Daniel Menezes-Blackburn ◽  
Jiahui Sun ◽  
Niklas J. Lehto ◽  
Hao Zhang ◽  
Marc Stutter ◽  
...  
Keyword(s):  
Soil Phosphorus ◽  
Desorption Kinetics ◽  
Simultaneous Quantification ◽  
Labile Pool

EFFECTS OF SOIL TEMPERATURE ON PHOSPHORUS EXTRACTABILITY. II. SOIL PHOSPHORUS IN SIX CARBONATED AND SIX NON-CARBONATED SOILS

1984 ◽  
Vol 64 (2) ◽  
pp. 255-263 ◽  
Author(s):  
S. C. SHEPPARD ◽  
G. J. RACZ
Keyword(s):  
Root Growth ◽  
Soil Temperature ◽  
Plant Uptake ◽  
Soil Phosphorus ◽  
P Uptake ◽  
Effect Of Temperature ◽  
Soil P ◽  
Desorption Curve ◽  
Labile Pool ◽  
Response To Temperature

The change in the extractability of soil phosphorus (P) in response to temperature was examined in 12 Manitoba soils. These soils varied in carbonate and P contents. The soil P was labelled with 32P to facilitate measurements. Sodium bicarbonate extractions, anion exchange resin extractions, P desorption curves and short-term plant uptake using wheat were used to measure P extractability. An increase in soil temperature increased the extractability of P. This was apparent for P extracted by NaHCO3 only in soils low in P. The P extracted by resin appeared to respond similarly but was quite variable. Effects of temperature on the desorption curve parameters were significant only in soils high in P. The latter may reflect the detection limits for P using the desorption curve extraction system. Plant uptake was closely correlated to root growth. Both increased markedly as temperature increased. However, in certain soils the increase in P uptake due to temperature was far greater than the corresponding increase in root growth. The estimates of the labile pool accessed by plants increased as temperature increased. The principle hypothesis, that the effect of temperature on P extractability changed from soil to soil, was confirmed. The only controlling soil factor that could be identified was the basic soil P content. Key words: Temperature, soil phosphorus, carbonated, non-carbonated, plant uptake, wheat

scholarly journals Desorption Kinetics of Legacy Soil Phosphorus: Implications for Non-Point Transport and Plant Uptake

Soil Systems ◽  
2022 ◽  
Vol 6 (1) ◽  
pp. 6
Author(s):  
Chad J. Penn ◽  
Mark R. Williams ◽  
James Camberato ◽  
Nicholas Wenos ◽  
Hope Wason
Keyword(s):  
Plant Uptake ◽  
Soil Phosphorus ◽  
Desorption Kinetics ◽  
Flow Rates ◽  
Soil P ◽  
First Order Kinetics ◽  
Flow Through ◽  
Kinetics Of ◽  
P Desorption ◽  
Solution Volume

Soil phosphorus (P) solubility and kinetics partly control dissolved P losses to surface water and uptake by plants. While previous studies have focused on batch techniques for measuring soil P desorption kinetics, flow-through techniques are more realistic because they simulate P removal from the system, akin to runoff, leaching, and plant uptake. The objectives were to measure soil P desorption by a flow-through technique at two flow rates and several batch methods, and utilize both for understanding how flow rate impacts the thermodynamics and kinetics of soil P desorption. Desorption obeyed first-order kinetics in two different phases: an initial rapid desorption phase followed by a gradual release. Desorption was limited by equilibrium and the kinetics of physical processes as demonstrated by an interruption test. Dilution-promoted desorption occurred with increasing cumulative volume, which increased desorption rate via first-order kinetics. The batch tests that simulated cumulative solution volume and time of flow-through were similar to the flow-through results; however, the batch methods overestimated the desorption rates due to less limitations to diffusion. Fast flow rates desorbed less P, but at a greater speed than slow flow rates. The differences were due to contact time, cumulative time, and solution volume, which ultimately controlled the potential for chemical reactions to be realized through physical processes. The interaction between these processes will control the quantity and rate of desorption that buffer P in non-point drainage losses and plant uptake.

Improved Plant Diversity as a Strategy to Increase Available Soil Phosphorus

2019 ◽  
Vol 103 (1) ◽  
pp. 43-45 ◽  
Author(s):  
Carlos Crusciol ◽  
João Rigon ◽  
Juliano Calonego ◽  
Rogério Soratto
Keyword(s):  
Crop Yields ◽  
Soil Phosphorus ◽  
Cropping System ◽  
P Availability ◽  
P Fractions ◽  
Crop Species ◽  
Soil P ◽  
Residue Decomposition ◽  
Available Soil Phosphorus ◽  
Crop Residue Decomposition

Some crop species could be used inside a cropping system as part of a strategy to increase soil P availability due to their capacity to recycle P and shift the equilibrium between soil P fractions to benefit the main crop. The release of P by crop residue decomposition, and mobilization and uptake of otherwise recalcitrant P are important mechanisms capable of increasing P availability and crop yields.

Effect of different fertilization systems on soil phosphorus fertility and crop yield

2009 ◽  
Vol 17 (5) ◽  
pp. 885-889
Author(s):  
Wan-Tai YU ◽  
Zi-Shao JIANG ◽  
Qiang MA ◽  
Hua ZHOU
Keyword(s):  
Crop Yield ◽  
Soil Phosphorus

Decadal Change in Vegetation and Soil Phosphorus Pattern across the Everglades Landscape

2003 ◽  
Vol 32 (1) ◽  
pp. 344 ◽  
Author(s):  
Daniel L. Childers ◽  
Robert F. Doren ◽  
Ronald Jones ◽  
Gregory B. Noe ◽  
Michael Rugge ◽  
...  
Keyword(s):  
Soil Phosphorus ◽  
Decadal Change

Phosphorus Leaching in Relation to Soil Type and Soil Phosphorus Content

2004 ◽  
Vol 33 (2) ◽  
pp. 678 ◽  
Author(s):  
Faruk Djodjic ◽  
Katarina Börling ◽  
Lars Bergström
Keyword(s):  
Soil Type ◽  
Phosphorus Content ◽  
Soil Phosphorus ◽  
Phosphorus Leaching
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