scholarly journals Soil Phosphorus Tests and Transformation Analysis to Quantify Plant Availability: A Review

10.5772/29904 ◽  
2012 ◽  
Author(s):  
Z.M. Zheng ◽  
T.Q. Zhang
Keyword(s):  
Soil Phosphorus ◽  
Plant Availability

scholarly journals Sensitivity of Three Phosphate Extraction Methods to the Application of Phosphate Species Differing in Immediate Plant Availability

Agronomy ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 29 ◽  
Author(s):  
Tobias Hartmann ◽  
Iris Wollmann ◽  
Yawen You ◽  
Torsten Müller
Keyword(s):  
Soil Phosphorus ◽  
Extraction Methods ◽  
Available P ◽  
Plant Availability ◽  
Soil P ◽  
Low Concentrations ◽  
High Sorption ◽  
Phosphate Species ◽  
Different Characteristics ◽  
Plant Available P

Extractive tests for determining the plant-availability of soil phosphorus (P) give varying results due to the inherently different characteristics of the extraction solution. Generally, classical soil P tests such as the Olsen or calcium acetate/lactate (CAL) method do not give an indication on the total amount of plant available P, but merely give an indication of the equilibrium between soil and extraction solution. It is also not entirely clear which fractions of P are directly determined through the various methods of extraction, i.e., determined P must not be immediately plant available, as is the case for rock phosphate. It is therefore possible that extraction methods either over or under estimate the amount of P available for plant consumption. In this research, we compared three methods of soil P determination (CAL, Olsen and diffusive gradients in thin films (DGT)) with regards to their ability to determine P species (Ca(H2PO4)2, CaHPO4, Ca3(PO4)2 and Inositol-6-hexakisphosphate) added to soils of high sorption capacity, immediately after as well as two weeks after application. For each of the methods, it could be shown that sorption processes in the soil immediately (0 days incubation) fix P to a point where it is not extractable through any of the described methods. These sorption processes continue over time, leading to a further decrease of determined P. The acidic CAL extraction method gives higher results of extractable P compared to the Olsen method. Due to the extraction of Ca3(PO4)2, the CAL method may overestimate immediately plant-available P. The most suitable methods for the determination of immediately plant available P may therefore be the Olsen and DGT methods. Organic IP6 is not determined by any of the extraction methods. At low concentrations of soil P, the DGT method may fail to give results.

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
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