NY97046 - Plant-Available Silicon (Si) as a Protectant against Fungal Diseases in Soil-Less Potting Media

This report contains the findings of a two year research project, which formulated potting mixes to provide a natural source of ‘plant-available’ Silicon, as monosilicic acid, by adding rice hull ash or, an inorganic silicate. The mixes were used to measure plant growth and accumulation of Silicon in the plants and to examine the protection of plats against fungal pathogens afforded by monosilicic acid added to mixes. A range of substrates commonly used in potting mixes was analyzed for monosilicic acid and total soluble silicon content.