Perubahan Konduktivitas Hidraulik dan Daya Hantar Listrik Tanah Akibat Pemberian Urea dan Bahan Organik pada Tanah Ultisol


  • Ida Suryani Universitas Cokroaminoto Makassar



urea, organic matter, hydraulic conductivity, electrical conductivity, ultisol


This study aimed to determine the effect of urea added with organic matter in a high C/N (50-70) or low C/N (10-20) ratio on the hydraulic conductivity and electrical conductivity of Ultisol soil. The research was arranged in a Split Plot Design. The main plot is organic matter, ie, without organic matter, calopogonium leaves, and rice straw 1,275 x 10-8 kg/ha, equivalent to 15.3 g/pipe. Sub-plots were urea doses consisting of 0, 100, and 300 kg/ha, equivalent to 0 g/pipe, 0.0425 g/pipe, and 0.0825 g/pipe, respectively, applied to Ultisol soil. Sample of Ultisol soil was taken at a depth of 0 -120 m which were air-dried, then sifted, mixed with TSP, organic matter, and urea according to treatment. The sample was put in a PVC tube (pipe) with the bottom covered with fine gauze to hold the soil but still allow percolation. . Incubation was carried out for two weeks. Observations were made after the incubation period, including hydraulic conductivity and electrical conductivity. The application of organic matter and urea at a dose of 300 kg/ha can increase the electrical conductivity of the soil. Adding the main organic matter with a high C/N ratio (rice straw) increases the hydraulic conductivity. Electrical conductivity (EC) is a good indicator in explaining the dispersive effect of urea and the effect of flocculation of organic matter. High electrical conductivity always results in high hydraulic conductivity in Ultisol soils.

Author Biography

Ida Suryani, Universitas Cokroaminoto Makassar

Fakultas Teknologi Pertanian, Universitas Cokroaminoto Makassar


Balbino, L. C., Bruand, A., Brossard, M., Grimaldi, M., Hajnos, M. And Guimar~aes, M. F. (2002). Changes in porosity and microaggregation in clayey Ferralsols of the Brailian Cerrado on clearing for pasture. Eur. J. Soil Sci. 53: 219-230.

Bravo-Garza, M.R., Bryan, R.B., (2005). Soil properties along cultivation and fallow time sequences on Vertisols in Northeastern Mexico. Soil Science Society of America Journal 69: 473– 481.

Cass, A. S.Gusli, and D.A.MacLeod (1994). Sustainability of Soil structure quality in ricew pady- soya-bean cropping systems in South Sulawesi- Indonesia. Soil and Tillage Research 31: 339 – 352.

Chun, H. C., Gim¶enez, D. and Yoon, S. W. (2008). Morphology, lacunarity andentropy of intra-aggregate pores: Aggregate size and soil management effects. Geoderma. 146: 83-93.

Emerson, W.W. (1959). The structure of soil crumbs. Journal of Soil Science 10: 235-244.

Hainun, (1997). Dispersibilitas beberapa tanah tropika akibat pemberian urea (skripsi). Jurusan Imu Tanah, fakultas Pertanian.

Hanafiah, K, A., (2007). Dasar-dasar Ilmu Tanah. Rajawali Pers. Jakarta.

Iranpour, M., A. Lakzianand R. Korrasami. (2014). Effect of cadmium and organic matter on soil pH, electrical conductivity and their roles in cadmium availibility in soil. JMEAST, 18:643-646.

Kutilek, M., Jendele, L. And Panayiotopoulos, K. P. (2006). The influence of uniaxial compression upon pore size distribution in bi-modal soils. Soil Till. Res. 86: 27-37.

Jun,W, S. Hui-zhein and Z. Dao-ming (1985). Electrical Conductuvity. In: Y. Tianren (ed). Physical Chemistry of paddy Soils. Springer-Verlag. New York 157 -163.

Mohr, E.C.J., F.A. Van baren and J. Van Schuylenborgh (1972). Tropical Soils. The Haque, Paris.

Munir, S (1996). Tanah–tanah Utama Indonesia. Karakteristik, Klassifikasi dan pemanaafannya. Pustaka Jaya, Malang.

Nayak, P., D. Patel, B. Ramakrishnan, A.K. Mishraand R.N. Samantaray. (2009). Long-term aplication effects of chemical fertilizer and compost on soil organic carbon under intensive rice-rice cultivation. Nutr.Cycl. Agroecosyst., 83:259-269.

Pampolino, M.F., E.V. Laureles, H.C. Ginesand R.J. Buresh. (2008). Soil carbon and nitrogen changes in long-term continuous lowland rice cropping. Soil Sci. Soc. Am. J., 2: 798-807.

Samosir, S. S. R (1994). Kimia Tanah. Jurusan Ilmu Tanah, Fakultas Pertanian dan Kehutanan Universitas Hasanuddin, Ujung Pandang.

Soil Survey Staff. Soil Taxonomy (1975). A basic System For making and Interpreting Soil Survey. Dept. Agr. Hand Book no.436.

Suryani, I. (2014). Permiabilitas berbagai kedalaman tanah pada areal konversi lahan hutan. Agrisistem Seri Hayati Vol.2. ISSN No. 1858-4330.

Wairiu, M. and Lal, R. (2006). Tillage and land use effects on soil microporosity in Ohio, USA and Kolombangara, Solomon Islands. Soil Till. Res. 88: 8084.