Phosphorus (P)
Occurrence
More than 90% of soil P is normally fixed and cannot be used by plants. Another part of insoluble P, the ‘labile fraction’, exchanges with the soil solution. The inorganic P (Pi) released from the labile compartment can be taken up by plants. However, this release is extremely slow and thus P deficiency is widespread. The form in which Pi is found in the soil solution is pH dependent but at typical soil solution pH, Pi consists almost exclusively as H2PO4− and this is the form in which plants take up Pi. The low P availability means that in agricultural settings, P is replenished with large amounts of P fertiliser derived from phosphate rock, a finite source material.
Phosphorus (P)OccurrenceMore than 90% of soil P is normally fixed and cannot be used by plants. Another part of insoluble P, the ‘labile fraction’, exchanges with the soil solution. The inorganic P (Pi) released from the labile compartment can be taken up by plants. However, this release is extremely slow and thus P deficiency is widespread. The form in which Pi is found in the soil solution is pH dependent but at typical soil solution pH, Pi consists almost exclusively as H2PO4− and this is the form in which plants take up Pi. The low P availability means that in agricultural settings, P is replenished with large amounts of P fertiliser derived from phosphate rock, a finite source material.
การแปล กรุณารอสักครู่..