Growth and biomass turnover ofHydrocharis dubia L. cultured under different nutrient conditions |
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Authors: | Takayoshi Tsuchiya |
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Affiliation: | (1) Institute of Biological Sciences, University of Tsukuba, 305 Tsukuba Ibaraki, Japan |
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Abstract: | Growth of a floating-leaved plant,Hydrocharis dubia L., was examined under varying nutrient conditions between 0.3 and 30 mgN l−1 total inorganic nitrogen.H. dubia plants cultured under the most nutrient-rich condition showed the highest maximum ramet density (736 m−2), the highest maximum biomass (80.4 g dry weight m−2), and the highest total net production (185 g dry weight m−2 in 82 days). Plants under nutrient-poor conditions had a relatively large proportion of root biomass and a small proportion of leaves with a long life span. Compared with other floating-leaved and terrestrial plants, the maximum biomass ofH. dubia was relatively small. This, and the rapid biomass turnover, was related to the short life span of leaves (13.2–18.7 days) and large biomass distribution to leaves. |
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Keywords: | Aquatic macrophyte Biomass turnover Hydrocharis dubia Leaf life span Nutrients |
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