Application of silicon sources increases silicon accumulation in perennial ryegrass turf on two soil types |
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Authors: | U N Nanayakkara W Uddin L E Datnoff |
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Institution: | (1) Department of Plant Pathology, The Pennsylvania State University, University Park, PA 16802, USA;(2) Department of Plant Pathology, University of Florida, Gainesville, FL 32611, USA |
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Abstract: | This study investigated the ability of perennial ryegrass to accumulate silicon and the factors that may influence plant silicon
accumulation. Plants were grown in the greenhouse in two soil types, peat:sand mix and Hagerstown-silt-loam, amended with
two commercially available sources of silicon, calcium silicate slag and wollastonite at 0, 0.5, 1, 2, 5 and 10 t/ha. Shoot
tissue of nine-week-old perennial ryegrass plants was analyzed for silicon content (%) and found to reach a dry matter concentration
of up to 4% in this study. Silicon accumulation in perennial ryegrass was influenced by the soil type and source, and was
higher in plants grown in low-silicon peat:sand mix compared to Hagerstown-silt-loam. Silicon content (%) in the plants consistently
increased with increasing rates of silicon in all four soil and source combinations. Acetic acid (HAc) extractable silicon
and Ca increased in both soil types when amended with either of the silicon sources. Effects of silicon sources on soil pH
varied with soil type. This study indicates that soil type, source of silicon, and rate of silicon application are important
factors influencing the uptake of silicon by perennial ryegrass which is a widely used turfgrass species in golf courses,
sports fields, and residential lawns in the United States. |
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Keywords: | Calcium silicate Wollastonite Lolium perenne Perennial ryegrass Plant nutrition Silicon Turfgrasses |
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