Elemental Uptake in Relation to Root Characteristics of Tall Fescue
作者： Glenn E. Shewmaker , Douglas A. Johnson , Henry F. Mayland , Scott A. Martin , Susie B. Hansen
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摘要: Abstract HiMag, an accession of tall fescue (Festuca arundinacea Schreb.), was selected for high magnesium (Mg) concentration in leaves to reduce grass tetany risk ruminants. However, the mechanism enhanced Mg uptake HiMag has not been determined. The objective investigate if increased could be explained by differences elemental distribution among plant parts, root characteristics, or organic acid concentrations compared its parental cultivars, “Kentucky 31” (KY31) and “Missouri 96” (MO96). study conducted on a surface-irrigated calcareous Portneuf silt loam (coarse-silty, mixed, mesic, Durinodic Xeric Haplocalcid). Vegetation soil cores 7.6-cm diameter were sampled 45-cm depth 15-cm increments. Mass ash determined leaves, crowns, roots. Leaf area, length, length density, concentration, [potassium (K), calcium (Ca), Mg, sodium (Na), phosphorus (P)], malate cit...
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