Phosphate Adsorption Capacity and Organic Matter Effect on Dynamics of P Availability in Upland Ultisol and Lowland Inceptisol

Marsi, Marsi and Kadir, Sabaruddin (2011) Phosphate Adsorption Capacity and Organic Matter Effect on Dynamics of P Availability in Upland Ultisol and Lowland Inceptisol. Tanah Tropika (Tropical Soil), 16 (02). pp. 107-114. ISSN ISSN 0852-257X

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    Abstract

    Ultisols and Inceptisols were used to investigate the adsorption-desorption capacity of P and the effect of organic matter on the dynamics of P availability in tropical acid soils. The experiment consisted of two sub-experiments. Sub-experiment I was to study the adsorption-desorption capacity of Ultisols, Fresh-water lowland Inceptisols, and tidal-swamp Inceptisols. Therefore, surface soils (0 to 30 cm) of each tested soil were treated with 0, 10, 20, 30, 40, 60, 80, 100, 120, 140, 170, and 200 mg P kg-1 of soil. Sub-experiment II was to study the effects of organic matter application (0, 5, 10, and 15 Mg ha-1) on the dynamics of available P following 60d incubation under room temperature. P fertilizer application significantly affected water soluble-P (WSP) (p<0.01) and soil available P-Bray and Kurtz No. 1 (BKP) (p<0.01) in the three tested soils. The different response of both WSP and BKP confirmed that the soils tested in the current experiment had different soil P buffering capacity in the order of Tidal-lowland Inceptisol>Upland Ultisol>fresh-water Lowland Inceptisol. OM application increased the BKP in all tested soils as compared to the control. Differences in pattern of soil available P dynamics over time were detected between upland soil and two lowland soils used in the current experiment. Keywords: Adsorption-desorption, Inceptisols, organic matter, Ultisols

    Item Type: Article
    Subjects: S Agriculture > S Agriculture (General)
    Divisions: Faculty of Agriculture > Department of Soil Science and Land Resources
    Depositing User: Dr Sabaruddin Kadir
    Date Deposited: 16 Aug 2012 21:21
    Last Modified: 16 Aug 2012 21:21
    URI: http://eprints.unsri.ac.id/id/eprint/1187

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