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Nutrient and growth responses of leersia oryzoides, rice cutgrass, to varying degrees of soil saturation and water nitrogen concentration

Author:
Koontz, Melissa B., Koontz, Joshua M., Pezeshki, S. R., Moore, Matthew
Source:
Journal of plant nutrition 2013 v.36 no.14 pp. 2236
ISSN:
1532-4087
Subject:
Leersia, adventitious roots, biomass, copper, flooded conditions, leaves, magnesium, manganese, nitrogen content, nutrient content, nutrients, potassium, saturated conditions, sodium, soil water, stems, sulfur, surface water, wetland plants, zinc
Abstract:
Leersia oryzoides (rice cutgrass) is an obligate wetland plant common to agricultural drainage ditches. The objective of this greenhouse study was to expose plants to various flooding and aqueous nitrogen (N) concentrations and then to quantify the allocation of nutrients and biomass to plant components. Plants in the continuously flooded treatment (CF) had the highest tissue concentrations of copper (Cu), sulfur (S), zinc (Zn), potassium (K), sodium (Na), and manganese (Mn) in one or more plant components. Plants in the partially flooded treatment (PF) had the highest concentrations of magnesium (Mg) in leaves. The N input affected phosphorus (P) and S concentrations in roots. Leaf, stem, and root biomass were highest in PF plants. Rhizome biomass was the lowest in CF plants. These results indicate that L. oryzoides may significantly affect elemental concentrations in surface waters by its ability to uptake various elements and subsequent sequestration in various biomass components.
Agid:
58923
Handle:
10113/58923