밭 토양에서 규산질비료 시용이 토양 환경에 미치는 영향 = Effect of Several Silicate Fertilizers on Potato-grown Field

다국어 초록 (Multilingual Abstract)

Application of silicate fertilizers is typically practiced to amend soil quality and improve rice productivity at the paddy field in Korea, and their effects are well-established. However, a little research on the effect of silicate fertilizers on soil and crop growth in upland soil was reported. Most of silicate fertilizers applied in Korea is slag-originated silicate fertilizer. Some water soluble silicate fertilizers are manufactured and commercially available. The objective of this study was to assess changes of soil chemical properties in potato-grown plots by applying slag-originated silicate fertilizer and water soluble silicate fertilizer. Field experiment was conducted on a silt loam paddy soil, where four levels of each silicate fertilizer were applied in soil at the rate of 0, 1, 2, 4 times of the recommended levels. Application of slag-originated silicate fertilizer increased soil pH, while no significant pH increase was occurred with the treatment of water soluble silicate fertilizers. Soil pH increased proportionally as slag-originated silicate fertilizer was applied. Available SiO2 contents also increased with the treatment of slag-originated silicate fertilizer. Exchangeable Ca, Mg and available phosphate contents in soil increased with application of slag-originated silicate fertilizer, while no significant increases for exchangeable Ca, Mg and available phosphate contents were shown with the application of soluble silicate fertilizer. Throughout this study, soil application of slag-originated silicate fertilizer enhanced soil chemical properties, while water soluble silicate fertilizer application in soil needs further study to better understand application method, application rate, type of water soluble silicate fertilizer, etc.