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Phosphorus availability and environmental risks in potato fields in N orth F lorida
Author(s) -
Liao X.,
Liu G.,
Hogue B.,
Li Y.
Publication year - 2015
Publication title -
soil use and management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.709
H-Index - 81
eISSN - 1475-2743
pISSN - 0266-0032
DOI - 10.1111/sum.12186
Subject(s) - phosphorus , fractionation , nutrient , zoology , crop , agronomy , saturation (graph theory) , chemistry , biology , ecology , mathematics , organic chemistry , combinatorics
Soil phosphorus (P) availability was compared with Mehlich‐1 soil testing and P fractionation at a research farm ( RF ) and 32 private farms ( PF s) in north Florida. The environmental risks caused by P release were evaluated using the P saturation ratio ( PSR ). Soil Mehlich‐1 P at the RF and the PF s was 41.9 ± 4.1 and 278 ± 13 mg/kg, respectively. The dominant inorganic P fraction for all farms was Na OH ‐Pi (Al/Fe‐bound P) followed by HC l‐Pi (Ca/Mg‐bound P) at most of the PF s but by Na OH ‐Po for the RF . Furthermore, the high PSR at the PF s indicated high risks of P loss from soil. To improve P use efficiency and enhance ecological sustainability, better P nutrient management should be implemented for Florida crop production.