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Title: | Changes in Phosphorus Fraction on an Acidic Soil Induced By Phosphorus Fertilizer, Organic Matter and Lime |
Authors: | Hartono, A. Vlek, P.L.G. Moawad, A. Rachim, A. |
Issue Date: | 2000 |
Publisher: | IPB (Bogor Agricultural University) |
Abstract: | One month of incubation experiment was implemented to evaluate the changes of phosphorus fraction in inorganic P (Pi) and organic P (Po) induced by phosphorus fertilizer (KH2P04), cow manure ( manure) and CaC03 (lime). A 0.5 kg oven-dried weight of arable layers of Latosol from Darmaga, Bogor was used in this study. The rates of manure were 0, 12.5 and 25 ffha, lime were 0, 1, 3 times the CaC03 equivalent required to neutralize exchangeable aluminum amounting to 0, 3.01, 9.03 t/ha respectively and the rates of phosphorus fertilizer in KH2P04 were 0, 40 and 80 kg Plha. All treatments increased resin-Pi (biologically available P). Application of phosphorus fertilizer also increased NaHC03-Pi which is also included as biologically available PI whi!e manure and lime only tended to increase this fraction. Phosphorus fertilizer and manure application were able to enhance NaOH-Pi (moderately resistant P related to AI-P and Fe-P ) but lime did not affect it. Phosphorus fertilizer, manure and lime increased HCI-Pi (moderately resistant P related to Ca-P). The changes of NaHC03-Pi to resin-Pi and P immobilization by microorganism, which was indicated by the increase of NaHCOrPo (readily mineralizable), can be attributed to the decrease of NaHC03- Pi. The increase of NaOH-Pi by phosphorus fertilizer and manure indicated that the complexation of P fixation sites by PO6 and organic acids likely had occurred. |
URI: | http://repository.ipb.ac.id/handle/123456789/24863 |
Appears in Collections: | Soil Science and Land Resource |
Files in This Item:
File | Description | Size | Format | |
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A. Hartono (RK).pdf | Publications | 741.99 kB | Adobe PDF | ![]() View/Open |
a_hartono.ps | 675.67 kB | Postscript | View/Open |
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