Changes of Soil Chemical Properties during Rice Straw Decomposition in Different Types of Acid Sulphate Soils

Organic residues often exhibit different physico-chemical properties and affect the soil ecosystem in different ways. Hence, the study of their impact on soil is essential to benefit from their potential as amendments and to avoid adverse environmental effects. It is required to study the role of rice straw in the changes of soil properties during decomposition processes in the rice field. The research was conducted on potential acid sulphate soil (PASS) and actual acid sulphate soil (AASS) in the glass house. Soil pH, Fe2+, organic-Fe, total N and available P were observed at 2, 4, 6 and 8 weeks after planting (WAP). The result showed that rice straw application : (1) decreased soil pH of PASS and increase soil pH of AASS; (2) tended to increase Fe2+ both in PASS and AASS; (3) stimulated the organic-Fe concentration in AASS was higher than organic-Fe concentration in PASS; (4) had no different effect in total N and decreased P concentration in the both of soil during observation. P concentration on PASS was lower than on AASS.Keywords: Decomposition, rice straw, soil chemical properties, soil type[How to Cite: Hairani A and A Susilawati. 2013.Changes of Soil Chemical Properties during Rice Straw Decomposition in Different Types of Acid Sulphate Soils. J Trop Soils 18 (2): 99-103. Doi: 10.5400/jts.2013.18.2.99]REFERENCESBalai Penelitian Tanah. 2005. Analisis Kimia Tanah, Tanaman, Air dan Pupuk. Badan Penelitian dan Pengembangan Pertanian. Departemen Pertanian. Bogor. p: 136 (in Indonesian).Banach AM, K Banach, RCJH Peters, RHM Jansen, EJW Visser, Z Stepniewska, JGM Roelofs and LPM Lamers. 2009. Effects of long-term flooding on biogeochemistry and vegetation development in floodplains; a mesocosm experiment to study interacting effects of land use and water quality. Biogeosciences 6: 1325-1339. doi:10.5194/bg-6-1325-2009.Bonneville S. 2005. Kinetics of Microbial Fe (III) Oxyhydroxide Reduction : The Role of Mineral Properties. [Dissertation]. 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