Main Article Content
Abstract
Ultisols, covering approximately 705,151 hectares in Bengkulu, represent a marginal soil type with considerable agricultural potential. However, they are limited by low nutrient availability, low pH, low organic carbon, and high concentrations of exchangeable aluminum (Al) and iron (Fe). These constraints significantly affect the growth and productivity of crops such as sweet corn, which is sensitive to acidic conditions and nutrient deficiency. Soil fertility improvement through organic matter application and liming is a promising approach. Azolla, an aquatic fern with high nitrogen content due to its symbiosis with Anabaena azollae, was used in composted form. This study aimed to determine the optimum application rates of Azolla compost and carbonate lime (CaCO₃) for improving nitrogen up take, growth, and yield of sweet corn in Ultisols. The treatments consisted of four Azolla compost levels (0, 5, 10, and 15 tons ha-1) and three lime rates equivalent to neutralizing 0, 1, and 2 units of exchangeable Al. A factorial experiment was arranged in a completely randomized design with three replications. Data were analyzed using analysis of variance (ANOVA), followed by orthogonal polynomial testing. Azolla compost significantly improved soil pH, organic carbon content, stem diameter, plant height, ear weight, biomass (fresh and dry), and nitrogen uptake. Lime applica tion significantly increased soil pH, stem diameter, and plant height. No significant interaction occurred between the two factors. Although positive responses were observed, the yield remained below the potential of the Bonanza F1 variety, likely due to high rainfall and suboptimal treatment levels. These findings support the integration of Azolla compost and lime into soil fertility management practices for sustainable sweet corn production on acidic tropical soils.
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References
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- de-Torres, M.A.R.R., Bojollo, M.R.C., Garcia, M.M., Fernandez, R.O., Lizana.A.R. (2021). Soil organic matter and nutrient improvement through cover crops in a Mediterranean olive orchard. Soil and Tillage Research, 210. DOI: https://doi.org/10.1016/j.still.2021.104977.
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- Safuan, L. O., & Bahrun, A. (2012). Effect of organic matter and potassium fertilizer on growth and production of melon (Cucumis melo L.). Jurnal Agroteknos, 2(2), 69–76.
- Schnitzer, M. (1986). Binding of humic materials. In P. M. Huang & M. Schnitzer (Eds.), Interactions of soil minerals with natural organics and microbes (pp. 77–101). Soil Science Society of America.
- Sime, D. (2001). Lime: The essential element in NewZealand agriculture. The Northland Lime Millers Association.
- Sulistiyanto, Y., Sustiyah, R., Miher, & Elijah, A. (2007). Leaching of some nutrients in inland peat soil that has been given dolomite lime. In Proceedings of HITI (Vol. 2). Yogyakarta.
- Tampubolon, E., Damanik, M. M. & Marpaung, P. (2018). Effects of chicken manure and CaCO₃ lime on some soil chemical properties and growth of corn (Zea mays L.) on Inceptisol Kwala Bekala soil. Online Journal of Agroecotechnology, 6(1), 158–166.
- Winarso, S. (2005). Basic soil fertility (Soil health and quality). Gava Media.
- Zubachtirodin, & Subandi. (2008). Increased efficiency of N, P, and K fertilizers and maize productivity on Ultisol dryland in South Kalimantan. Jurnal Tanaman Pangan, 27(1), 32–36.
References
Auler, A.C., Caires, E.F., Pires, L.F., Galetto, S.L., Romaniw, J. & Charnobay, A.C. (2019). Lime effects in a no-tillage system on Inceptisols in Southern Brazil. Geoderma Regional, 16. DOI: https://doi.org/10.1016/j.geodrs.2019.e00206.
Badan Pusat Statistik. (2019). Produksi jagung di Indonesia tahun 2018. Badan Pusat Statistik Indonesia.
Broadley, M.R., Escobar-Gutiérrez, A.J., Burns, A. & Burns, I.G. (2000). What are the effects of nitrogen deficiency on growth components of lettuce?. New Phytologist, 147(3), 519 – 526. DOI: https://doi.org/10.1046/j.1469-8137.2000.00715.x.
Buckman, H. O. & Brady, N. C. (1964). The nature and properties of soil (6th ed.). The MacMillan Company.
Bugis, C. C. (2011). Effects of composting on several soil chemical properties of Ultisols, growth, and production of peanut (Arachis hypogaea L.) [Undergraduate thesis, Pattimura University].
de-Torres, M.A.R.R., Bojollo, M.R.C., Garcia, M.M., Fernandez, R.O., Lizana.A.R. (2021). Soil organic matter and nutrient improvement through cover crops in a Mediterranean olive orchard. Soil and Tillage Research, 210. DOI: https://doi.org/10.1016/j.still.2021.104977.
Djuniwati, S., Hartono, A. & Indriyati, L. T. (2003). Effect of organic matter (Pueraria javanica) and natural phosphate on growth and P uptake of corn (Zea mays) in Andisol Pasir Sarongge. Jurnal Ilmu Tanah dan Lingkungan, 5(1), 17–22.
Guritno, B. (1995). Plant growth. UGM Press.,Yogyakarta.
Hardjowigeno, S. (1985). Soil science. Akademika Pressindo.
Hardjowigeno, S. (2002). Soil science (Rev. ed.). Akademika Pressindo.
Idris, A. R., Djuniwati, S. & Idris, K. (2008). Effect of organic matter and NPK fertilizer on nutrient uptake and maize production in Inceptisol Ternate. Jurnal Tanah dan Lingkungan, 10, 7–13.
Kusumawati, I. A. & Prayogo, C. (2019). The impact of land use changes in UB Forest on microbial biomass carbon and total bacterial population. Jurnal Tanah dan Sumberdaya Lahan, 6(1), 1165–1172.
Kusumo, D. (2008). Some research results on Azolla. http://kolamazolla.blogspot.com/2009/10/penelitian-azolla-di-faperta-ugm.htm
Maswada, H.F., Abd El-Razek, U.A., El-Sheshtawy, AN.A. & Mazrou, Y.R.A. (2020). Effect of Azolla iliculoides on growth, physiological and yield attributes of maize grown under water and nitrogen deficiencies. J Plant Growth Regul., 40, 558–573. DOI: https://doi.org/10.1007/s00344-020-10120-5.
Mulyani, A., Rachman, A. & Dariah, A. (2010). Distribution of acid land, potential, and availability for agricultural development. Jurnal Penelitian Tanah dan Agroklimat, 2(1), 23–34.
Osman, K.T. (2013). Plant Nutrients and Soil Fertility Management. In: Soils. Springer, Dordrecht. DOI: https://doi.org/10.1007/978.94-007-5663-2_10.
Pandao, M.R., Thakare, A.A., Choudari, R.J., Navghare, N.R., Sirsat, D.D. & Rathod,S.R. (2024). Soil Health and nutrient management. International Journal of Plant & Soil Science, 36(5), 873-883.
Prasetyo, B. H. & Suriadikarta, D. A. (2006). Characteristics, potential, and technology of Ultisol soil management for the development of dryland agriculture in Indonesia. Jurnal Litbang Pertanian, 25(2), 39–47.
Poerwowidodo, M. (1992). Study of soil fertility. Angkasa.
Rahmawati, A. (2013). Responses of several genotypes of sorghum intercropped with cassava (Manihot esculenta Crantz) [Thesis, University of Lampung].
Regasa, A., Haile, W. & Abera, G. (2025). Effects of lime and vermicompost application on soil physicochemical properties and phosphorus availability in acidic soils. Sci Rep 15, 25544 (2025). DOI: https://doi.org/10.1038/s41598025-02053-4.
Safuan, L. O., & Bahrun, A. (2012). Effect of organic matter and potassium fertilizer on growth and production of melon (Cucumis melo L.). Jurnal Agroteknos, 2(2), 69–76.
Schnitzer, M. (1986). Binding of humic materials. In P. M. Huang & M. Schnitzer (Eds.), Interactions of soil minerals with natural organics and microbes (pp. 77–101). Soil Science Society of America.
Sime, D. (2001). Lime: The essential element in NewZealand agriculture. The Northland Lime Millers Association.
Sulistiyanto, Y., Sustiyah, R., Miher, & Elijah, A. (2007). Leaching of some nutrients in inland peat soil that has been given dolomite lime. In Proceedings of HITI (Vol. 2). Yogyakarta.
Tampubolon, E., Damanik, M. M. & Marpaung, P. (2018). Effects of chicken manure and CaCO₃ lime on some soil chemical properties and growth of corn (Zea mays L.) on Inceptisol Kwala Bekala soil. Online Journal of Agroecotechnology, 6(1), 158–166.
Winarso, S. (2005). Basic soil fertility (Soil health and quality). Gava Media.
Zubachtirodin, & Subandi. (2008). Increased efficiency of N, P, and K fertilizers and maize productivity on Ultisol dryland in South Kalimantan. Jurnal Tanaman Pangan, 27(1), 32–36.