CHANCE OF PHOSPHATE FERTILIZING TO THE SURFACE MINERAL ULTISOLS FLOODED

• Main Author: Andriko Noto Susanto
• Format: Article
• Language: Indonesian
• Published: Universitas Janabadra 2013-01-01
• Series: Jurnal Pertanian Agros
• Subjects: ultisols; surface charge; flooded
• Online Access: http://e-journal.janabadra.ac.id/index.php/JA/article/view/300/233
• ISSN: 1411-0172; 2528-1488

Ultisols are soils formed in the intensive leaching of bases, acid soil reaction, with relatively good soil drainage causing of acid soil pH and increased levels of Al/Fe-free, thus exacerbating the toxicity of Al/Fe and phosphate fixation. Ultisols flooding for rice cultivation can change the equilibrium behavior of the surface charge constituent soil minerals, particularly in relation to the reactivity of the phosphate anion. From various research results, it is evident that the flooding caused changes Ultisols redox potential values (Eh) becomes smaller and the soil pH near neutral, so the impact on the change in equilibrium behavior of nutrients, especially Al, Fe, Mn, N, P, K, S, Zn, Cu, and Si. Flooding can increase the availability of P in soil solution, due to decreasing redox potential (Eh), soil pH increased and decreased reactivity and ferol aluminol groups of surface mineral Kaolinite, Gibsite and Goetite the phosphate anion. An understanding of the chance of the surface chemistry of the Ultisols flooded terms of aspects of mineralogy, surface charge characteristics, and chemical equilibrium in soil solution can be used as a basis for nutrient management, especially in enhancing the efficiency and effectiveness of phosphate fertilizer.