Accumulation and Downward Transport of Phosphorus in Florida Soils and Relationship to Water Quality*
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چکیده
Accumulation of phosphorus (P) for Florida soils under citrus production may have an impact on groundwater and nearby streams and lakes. Six extracting solutions including Mehlich3, Bray1, double-acid, ammonium bicarbonate-DTPA (ABDTPA), neutral NH4OAc, and water were used to investigate P accumulation for 44 surface soils. The samples have been collected from old groves in 7 major citrus production counties in Florida. The results indicated P accumulation in most soils investigated. Either Mehlich3, Bray1, or double-acid was a good test to evaluate P accumulation. The average amount of P extracted was 121, 97, and 101 mg kg soil for Mehlich3, Bray1,
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تاریخ انتشار 2002