Lumbanraja, Jamalam and Novpriansyah, Hery and Niswati, Ainin and Sari, Tri Purnama (2016) Phosphorus Adsorption Behavior as Affected by Compost, Iron ion, and Iron Concretion in a Highly Wheathered Soil. In: The 6 International Symposium for the Development of Integrated Pest Management (IPM) in Asia and Africa, 2-3 March 2016, Niigata University, Japan.

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It is to be concerned that because of the high content of free iron (Fe) and (Fe) concretion,ph osphorus (P) is generally tighly bound as Fe-P compounds in soil system found in the humid tropical region and, therefore, the available P for plant growth is very low. Beside as a source of complete essential nutrients for plant, source of energy and nutrients for soil organism, and for soil structure improvements, the use of organic compost would be able to inactivate the free iron and iron concretion in the soil so that the applied P from fertilizers would be available for plant. The objective of this study is to determine the effect of free Fe, iron concretion and compost materials on the P sorption behavior in a highly wheathered (Ultisols) soil. The study consists of five reatments: S (soil), SF(soil+FeCl ), SC (soil+concretion), SFO (soil+FeCl3+compost), and SCO (soil+concretion+compost). The organic compost has been developed from the mixed of fresh cow dung, coconut fine fiber waste, air dried solid waste powder of the monosodium glutamat (MSG) processing (about 9.5% of P), husk, and chicken manure being composted for 30 days. The air dried sub-soil sample, iron concretion and compost had been grinded and passed through 0.5 mm sieve. The P sorption behavior of the treatments were constructed using Langmuir Plots. The results showed that the free Fe drastically increased the maximum adsorption-P and relative P-binding energy in to the soil colloid and reduce the amount of available P followed by iron concretion treatment. While the organic compost reduced the maximum adsorption-P and relative P-binding energy and the increased the available P. The highest maximum adsorption-P and relative binding energy were found in the SF (soil+FeCl3 treatment), whereas the lowest value of maximum P adsorption and binding energy were in the SCO (soil+iron concretion+compost) treatment.

Item Type: Conference or Workshop Item (Speech)
Subjects: S Agriculture > S Agriculture (General)
Divisions: Fakultas Pertanian (FP) > Prodi Ilmu Tanah
Depositing User: Prof.Dr.Ir Jamalam Lumbanraja
Date Deposited: 01 Nov 2016 04:12
Last Modified: 01 Nov 2016 04:12

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