HUBUNGAN ANTARA STATUS C-ORGANIK DAN STABILITAS AGGREGAT TANAH KEBUN PERCOBAAN LIMAU MANIS PADANG PADA BEBERAPA PENGGUNAAN LAHAN
Abstract
Organic matter is one of soil bonding agent in formation and stabilization of soil aggregates or soil structure.  Since it affects several other soil peorperties, soil structure is considered as a determinant for soil quality.  Therefore, depletion of organic matter content in a soil will cause soil degradation and consequently environmental pollution.  This research was aimed to determine org-C status of Ultisols Limau Manis and the relationship to aggregate stability, as affected by land use change.  The results showed that soil organic-C decreased by approximately 42% (from 9.86% to 5.75%) and by 55% (from 9.86% to 4.42%) at 0-10 cm depth and by 45% (from 3.79% to 2.09%) and 18% (from 3.79% to 3.10%) at 10-20 cm depth as land use was changed from forested ecosystem to perennial and annual crops, respectively, in Ultisols Limau Manis Padang.   There was a tendency of positive correlation between soil org-C status and the aggregate stability, or negative correlation between org–C status and the dispersion ratio (DR).  Between both depths, 10-20 cm depth showed a stronger correlation than that of 0-10 cm depth.
Key words: org-C, land use change, dispersion ratio, aggregate stability
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Aase, J.K. and Pikul., J.L.Jr. (1995). Crop and soil response to long-term tillage practices in the northern Great Plains. Agron. J., 87(4), p652-656.
Anderson, J.M., Flanagan, P.W., Caswell, E., Coleman, D.C., Cuevas, E., Freckman, D.W., Jones, J.A., Lavelle, P., and Vitousek, P. (1989). Biological processes regulating organic matter dynamics in tropical soils. In “Dynamics of Soil Organic Matter in Tropical Ecosystemsâ€, edited by D.C.Coleman, J.M.Oades, and G.Uehara., NifTAL Project, Univ. of Hawaii, Honolulu, p97-124.
Bowman, R.A., Vigil, M.F., Nielsen, D.C., and Anderson, R.L. (1999). Soil organic matter changes in intensively cropped dryland systems. Soil Sci. Soc. Am. J., 63(1), p186-191.
Chappel, N.A., Ternan, J.L., and Bidin, K. (1999). Correlation of physicochemical properties and sub-erosional landforms with aggregate stability variations in a tropical Ultisol disturbed by forestry operations. Soil Till. Res., 50, 55-71.
Dalal, R. C. and Bridge, B. J. (1996). Aggregation and organic matter storage in sub-humid and semi-arid soils. In “Structure and Organic Matter Storage in Agricultural Soilsâ€â€™ edited by M.R.Carter and B.A.Stewart, Lewis Publisher, Boca Raton, 263-308.
Dept. of Agriculture, Univ. of Queensland. 1999. Practical Manual: Soil physics. Departement of Agriculture University of Queensland, Australia. 44 hal
Emerson, W.W. (1967). A classification of soil aggregates based on their coherence in water. Aust. J. Soil Res. 5, p47-57.
Fitrisia, L. (2004). Klasifikasi tanah dan evaluasi kesesuaian lahan untuk tanaman kelapa sawit, gambir dan jati pada kebun percobaan Fakultas Pertanian Universitas Andalas. Skripsi Sarjana Pertanian, Padang, 103 hal.
Hakim, N., Nyakpa, M.Y., Diha, M.A., Munawar, A., Hong, G.B., dan Bailey, B.B. (1986). Penuntun praktikum dasar-dasar ilmu tanah. BKS-PTN Barat
Hillel, D. (1982). Introduction to soil physics. Academic Press, San Diego, 364pp.
Imbang, I.N.Dt.R., A. Rasyidin, L.Maira, Adrinal, dan Hermansyah. (1994). Klasifikasi tanah kebun percobaan Fakultas Pertanian Universitas Andalas di Limau Manis Kotamadya Padang. Lembaga Penelitian Universitas Andalas Padang. 51 hal.
Jastrow, J. D. (1996). Soil aggregate formation and the accrual of particulate and mineral-associated organic matter. Soil Biol. Biochem., 28(4/5): p665-676.
Lynch, J.M. (1983). Effect of antibiotics on ethylene production by soil microorganisms. Plant and Soil., 7(3), p415-420.
Miller, B.J. 1983. Ultisols. In “Pedogenesis and Soil Taxonomy: II The Soil Orders†edited by L.P.Wilding, N.E.Smack, and G.F. Hall. Elsevier Science Publisher B.V. p283-323
McLaren, R.G. and Cameron, K.C. (1996). Soil science, sustainable production and environmental protection. New Ed. Oxford Univ. Press, Inc., Auckland, 304 pp.
Oades, J.M. 1984. Soil organic matter and structural stability: mechanisms and implications for management. J. Plant and Soil., 76, 319-337.
Rasyidin, A. 1994. The method for measuring rates of weathering and soil formation in watershed. Tottory Univ., PhD Disertation, 110 pp.
Rusman, B., Yulnafatmawita, and Adrinal (1993).Ketersediaan air tanah Podzolik Merah Kuning Kebun Percobaan Limau Manis Padang.
Sanchez, P.A. (1976). Properties and management of soils in the tropics. John Wiley & Sons, Inc. New York, 618 pp
Sharma, P.K. and De Datta, S.K. (1985). Effects of puddling on soil physical properties and processes. In “ Soil Physics and rice†IRRI, Los Banos, p 217-234.
Six, J., Elliott, E.T., Paustian, K., Doran, J.W. (1998). Aggregation and soil organic matter accumulation in cultivated and native grassland soils. Soil Sci. Soc. Am. J., 62(5), p1367-1377.
Veldkamp, E. (1994). Organic carbon turnover in three tropical soils under pasture after deforestation. Soil Sci. Soc. Am. J., 58 (1), p175-180.
Yulnafatmawita (1995). Sebaran bahan organik dan kepadatan tanah Kebun Percobaan Fakultas Pertanian Universitas Andalas Limau Manis Padang. Lembaga Penelitian Universitas Andalas Padang.
Yulnafatmawita, So, H.B., Dalal, R.C., and Menzies, N.W. (2003). CO2 Release from two contrasting soils under controlled (Glasshouse) condition. Proceedings The 16th Triennial International Soil Tillage Research Organisation (ISTRO) Conference, 13-18 July 2003, Brisbane, Queensland, Australia. p1403-1407
Yulnafatmawita. (2004a). CO2 emission following cultivation of two contrasting soils under natural condition. Stigma Sci.J. Vol.XII(2):p129-133
Yulnafatmawita. (2004b). Effects of land use change on soil organic matter status of bulk and fractionated soil aggregates. Stigma Sci. J. XII(2):417-421
DOI: http://dx.doi.org/10.25077/js.3.2.75-82.2006
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