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Journal : Journal of Tropical Soils

Soil pH and Solubility of Aluminum, Iron, and Phosphorus in Ultisols: the Roles of Humic Acid Ifansyah, Hairil
JOURNAL OF TROPICAL SOILS Vol. 18 No. 3: September 2013
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2013.v18i3.203-208

Abstract

Soil reaction (pH), aluminum (Al), iron (Fe) and phosphorus (P) are the parameters which presences in soil are related to each other. The role of each parameter on the grow than development of plants is very significant. Liming and organic mater amendment are some efforts that are frequently performed to increase the pH and P solubility and suppress the solubility of Al and Fe in the soil. Humic acid is one of the organic fractions which is presumed has roles and is closely related to the changes in soil chemical properties as mentioned above. Information about the role of humic acid on the soil pH, the solubility of Al, Fe, and P, especially in upland acidic Ultisols is still limited.  This study aims to: provide empirical data on the roles of various humic acids to soil pH and the solubility of Al, Fe, and P, specifically in upland acidic Ultisols.  The study was a laboratory experiment with a single factor which set by using a completely randomized block design and conducted in two sets of experiments. The first experiment is intended to study the roles of various humic acids derived from several sources (commercial humic acid, humic acids extracted from composted chicken manure, humic acids extracted from composted cow manure and humic acids extracted from composted goat manure) to the soil pH and solubility of Al, Fe, and P. The second experiment was aimed to see the patterns of relationships between application of humic acid (sold commercially) on pH and solubility of Al, Fe, and P. The results showed that humic acid was able to increase the soil pH, solubility of phosphorus, and suppressed the solubility of iron and aluminum with linear patterns of relationships. In increasing the pH, solubility of phosphorus, and suppressing the solubility of iron and aluminum in the soil, humic acid that is sold commercially, at the same amount of C-organics, has greater roles than those derived from organic matter of compost extracts and from organic matter of compost.Key words: Aluminum, Humic acid, iron, pH, phosphorus[How to Cite: Ifansyah H. 2013. Soil pH and Solubility of Aluminum, Iron, and Phosphorus in Ultisols: the Roles of Humic Acid. JTrop Soils 18 (3): 203-208. Doi: 10.5400/jts.2013.18.3.203][Permalink/DOI: www.dx.doi.org/10.5400/jts.2013.18.3.203]REFERENCESAgbenin JO.  2003.  Extractable iron and alumunium effects on phosphate sorbtion  in a Savanna Alfisol.  Soil Sci Soc Am J 67: 589-595Andrian RDP. 1990.  Hubungan Antara Susunan Asam Humat dan Asam Fulfat serta Kemasaman Total Bahan Organik Tanah dengan pH Tanah. Aluminium dan N Tersedia. [Skripsi]. FakultasPertanian Universitas Lambung Mangkurat.  Banjarbaru.Antelo J, F Arce, M Avena,  S Fiol, R Lopez and F. Macias.  2007.  Adsorption of humic acid at the surface of goethite and its competitipe interaction with phosphate.  Geoderma 138: 12-17.Arifin F, B Radjagukguk and BH Purwanto.  2009.  Phosphate and ferrous solubility on acid sulphate soils treated with rice straw. J Trop Soils 14: 119-125Balai Penelitian Tanah. 2005.  Petunjuk Teknis Analisis Kimia Tanah. Tanaman Air. Dan Pupuk.  Balai Penelitian Tanah Badan Penelitian dan Pengembangan Pertanian Departemen Pertanian.  Bogor. 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Application of Biocom-Phosphate Solubilizing Fungi and Coal Fly-Ash to Increase P-Availability of Peat Soil in Kalimantan Ichriani, Gusti Irya; Ifansyah, Hairil; Maulana, Agus; Fauwziah, Ema Rizki; Syifa, Muhammad; Lautt, Bambang Supriyono; Jaya, Adi; Chusnul Chotimah, Hastin Ernawati Nur; Pasaribu, Wiranda
JOURNAL OF TROPICAL SOILS Vol. 27 No. 3: September 2022
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2022.v27i3.111-119

Abstract

The peatlands have the potential to support food security efforts. However, there is have constraints on soil fertility, especially the P nutrients availability. The biotechnology approach, the application of ameliorant (biochar-compost carrier medium (biocom)) enriched with phosphate solubilizing fungi (PSF) and coal fly ash (CFA), was expected to increase the P-availability in peat soils. The research aimed to study the application of biocom enriched with PSF and CFA to increase soil P-availability and plant P-uptake. The study was conducted using peat soil media with the formulation of CFA and biocom enriched with PSF and CFA as treatments. The treatment effect was observed through soil P available and plant P uptake of maize. The results showed PSF application was inconsistent in improving P available in peat soils in Kalimantan. In Central Kalimantan, Biocom + PSF was able to increase P available in peat soils by up to 406.18% (A. oryzae-Tb7) and 353.44% (N. fischeri-Tm8). However, in South Kalimantan P available in peat soil was only 8.04% (A. oryzae-Tb7) and 12.86% (N. fischeri-Tm8). The CFA+ (biocom+PSF) formulation increased P available in Central Kalimantan peat soils, but it was different from South Kalimantan peat soils. The application of biocom+PSF and CFA has not been able to increase the P uptake of maize plant in peatlands of South Kalimantan.