Main Article Content
Abstract
Phosphorus is one of macro nutrient which becomes limiting factor for plant growth on the upland. Available soil P is low because fixations by Al, Fe, and Mn oxide make it unavailable for plant. The objective of this research is to study the effect of phosphorus fertilizer on soil productivity, growth and corn production. The research was conducted on Inceptisols in Cibatok, Cibungbulang, Bogor and Ultisols in Jagang, South Abung, North Lampung on dry season 2004. The experiment used randomized complete block design, with three replications. The doses of P fertilizer to try were: 0, 20, 40, 60 and 80 kg P ha-1. Sources P fertilizer to use were TSP Anjing Laut and SP- 36 (40 kg P ha-1). The results of this research show that P fertilizer significantly increase plant height, and weight of production. The optimum dose of P fertilizer for corn on Inceptisols and Ultisols ranges from 20 to 40 kg ha-1. The use of P from the sources which have similar solubility in water have the same effect on soil productivity.
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References
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References
Balai Penelitian Tanah, 2005. Analisis kimia Tanah, tanaman, air, dan pupuk. Petunjuk Teknis. p. 136.
Dierolf, T., Thomas Fairhurst, dan Ernst Mutert. 2001. Soil Fertility Kit: a toolkit for acid, upland soil fertility management in Southeast Asia. P. 149. PPI, PT Jasa Katom, ProRLK, GTZ GmbH, dan Kalimantan Upland Farming (KUF).
Hartono, A., P.L.G. Vlek, A. Moaward and A. Rachim. 2000. Changes in phosphorus fractions on an acidic soil induced by phosphorus fertilizers, organic matter and lime. Jurnal Ilmu Tanah dan Lingkungan. 3(2): 1-7.
Havlin, J. L., J. D. Beaton, S. L. Tisdale and W.
L. Nelson. 1999. Soil Fertility and Fertilizers
An Introduction to Nutrient Management. 6th ed. Prentice Hall, Upper Saddle River, New Jersey. pp. 497.
Hidayat, A. dan A. Mulyani. 2002. Lahan Kering untuk Pertanian. hlm. 1-34. Buku Pengelolaan Lahan Kering untuk Meningkat- kan Produksi Pertanian Berkelanjutan. Mappaona et al. (eds). Pusat Penelitian dan Pengembangan Tanah dan Agroklimat, Bogor.
Mutert, E. W. and J. Sri Adiningsih. 1996. Tropical
upland improvement: comparative performance of different phosphorus source. p. 97-108. In Nutrient Management for Sustainable Crop Production in Asia. Proc. Of an International Conference held in Bali, Indonesia, 9-12 December 1996.
Santoso, D. 1996. Development of phosphorus fertilizer use on acid soils in Indonesia. p. 75-84. In Nutrient Management for Sustainable Crop Production in Asia. Proc. Of an International Conference held in Bali, Indonesia, 9-12 December 1996, .
Sri Adiningsih and Kasno. 1999. Increasing the productivity of marginal upland for agricultural development in Indonesia. Paper presented at the International Symposium on Management Technologies for The Improvement of Problem Soils; Queson City, Philippines: 3-5 August, 1999.
Sutriadi, M.T., R. Hidayat, S. Rochayati, dan D.
Setyorini. 2005. Ameliorasi lahan dengan fosfat alam untuk perbaikan kesuburan Tanah kering masam Typic Hapludox di Kalimatan Selatan. hlm. 143 – 155. Prosiding Seminar Nasional Inovasi Teknologi Sumber Daya Tanah dan Iklim. Pusat Penelitian dan Pengembangan Tanah dan Agroklimat, Bogor, 14-15 September 2004,
Wade, M. K., Dan W. Gill, H. Subagj, M. Sudjadi and Pedro A. Sanchez. 1988. Overcoming soil fertility constraints in a Transmigration area of Indonesia. Neil Caudle (ed). TropSoils Bulletin No. 88-01. The Soil Management Collaborative Research Support Program, North Carolina State University.