Soil organic phosphorus and the phosphorus nutrition of plants

1962 ◽  
Author(s):  
Gurcharan Singh Sekhon
Keyword(s):  
Organic Phosphorus ◽  
Phosphorus Nutrition ◽  
Soil Organic Phosphorus

MINERALIZATION OF SOIL ORGANIC PHOSPHORUS WITH PARTICULAR REFERENCE TO THE EFFECT OF LIME

1963 ◽  
Vol 43 (1) ◽  
pp. 97-106 ◽  
Author(s):  
R. L. Halstead ◽  
J. M. Lapensee ◽  
K. C. Ivarson
Keyword(s):  
Phosphorus Content ◽  
Organic Phosphorus ◽  
Acid Soils ◽  
Inorganic Phosphorus ◽  
Eastern Canada ◽  
Surface Samples ◽  
Soil Organic Phosphorus ◽  
Repressive Effect ◽  
Partial Sterilization ◽  
Positive Effect

In a laboratory experiment, liming resulted in an average decline of 3.6 per cent in the total organic phosphorus content of incubated surface samples of seven acid soils from eastern Canada. Increases of 2.6 and 5.1 per cent in 1N H2SO4- and 4N HCl-soluble inorganic phosphorus, respectively, and a decrease of 46.4 per cent in NaHCO3-soluble organic phosphorus (pH 8.5) provided further evidence of mineralization of organic phosphorus following liming. There was some evidence, however, that the differences in NaHCO3-soluble organic phosphorus following liming were due only in part to mineralization, since Ca(OH)2 added to a soil just prior to extraction with NaHCO3 had a repressive effect on the solubility of the organic phosphorus compounds.Some mineralization of organic phosphorus occurred when unlimed samples were incubated in the laboratory for 9 months.Marked increases in microbiological activity, as indicated by increased numbers of microorganisms, and increased CO2 and NO3-nitrogen production, were associated with lower values for extractable organic phosphorus following liming. Partial sterilization of samples with toluene lowered biological activity in the unlimed and limed samples. Toluene was found, however, to have a positive effect on release of phosphorus from organic form.

Long-term farmyard manure application affects soil organic phosphorus cycling: A combined metagenomic and 33P/14C labelling study

2020 ◽  
Vol 149 ◽  
pp. 107959
Author(s):  
Qingxu Ma ◽  
Yuan Wen ◽  
Jinzhao Ma ◽  
Andy Macdonald ◽  
Paul W. Hill ◽  
...  
Keyword(s):  
Organic Phosphorus ◽  
Farmyard Manure ◽  
Phosphorus Cycling ◽  
Manure Application ◽  
Soil Organic Phosphorus ◽  
14C Labelling

Resin extraction of labile, soil organic phosphorus

1993 ◽  
Vol 44 (3) ◽  
pp. 467-478 ◽  
Author(s):  
G. H. RUBAEK ◽  
E. SIBBESEN
Keyword(s):  
Organic Phosphorus ◽  
Soil Organic Phosphorus
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