ホテイアオイによる無機塩類除去効果に関する基礎研究 : II. より広い濃度範囲での培養実験

概要

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Water hyacinth was grown at eight different concentrations of culture solution, ranging from 1/8-fold to 10.7-fold of the standard solution, which contained 28 ppm of total N and 7.7 ppm of total P. The largest plant biomass in the summer experiment was obtained at a N concentration of ca. 60 ppm, while the growth was strongly inhibited at lower and higher concentrations. All summer plants died in the 10.7-fold solution in four weeks. The growth of winter plants in a slightly heated glasshouse was fairly uniform at all levels of nutrient concentration and no distince optimum concentration was recognized. A modified reciprocal equation, 1/w=A/f+A'f/(1-f/C)+B, was proposed to describe the response of plant biomass (w) to N concentration (f) in the culture solution, C being the upper limit of f for the survival of water hyacinth.
日本生態学会の論文
1983-03-30