Effect of Incubation Period on Phosphate Sorption from Three P Sources in Morelos Soil
Abstract:
The phosphorus incubation was conducted for 0, 3, 7, 14, 28, 56 and 90 days in a Completely Randomized Design with three fertilizer treatments Triple Super Phosphate (TSP) Phosphate Rock (PR) and Bone Material (BM) applied @ 40 and 80 mg kg-1 in an alkaline calcareous soil. Generally maximum phosphorus was available at d0(day zero) and decreased with increase in incubation time. At day 0, the mean available phosphorus was 42.5% in TSP treatment followed by 5.5 and 4.8% P solubility in phosphate rock and bone material treatment. At day 90, only 10.12% phosphorus was available in TSP treatment followed by 0.0% phosphorus availability in PR and BM treatments. The minimum TSP sorption was observed at d0 and increased with the increase in incubation time. The results indicated a rapid initial sorption of TSP and the decrease in the sorption intensity with time. The sorption saturation (maximum sorption) was attained at 14 days incubation of 80 mg P kg-1 as TSP. The increase in incubation time did not further affect P fixation of upper TSP level however the lower level (40 mg P kg-1) decreased constantly up to 90 days incubation.
How to cite this article
Vicente Espinosa Hernandez, Muhammad Akhtar, Alejandro Baeza Reyes, Abdul Mujeeb Qazi and Roberto Nunez Escobar, 2005. Effect of Incubation Period on Phosphate Sorption from Three P Sources in Morelos Soil. Pakistan Journal of Biological Sciences, 8: 61-64.
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