Modelling the relative growth rate as a function of plant nitrogen concentration |
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| Authors: | Tadaki Hirose |
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| Institution: | T. Hirose, Dept of Botany, Faculty of Science, Univ. of Tokyo, Hongo, Tokyo 113, Japan. |
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| Abstract: | The relationship between the relative growth rate (RGR) and the nitrogen concentration of the whole plant (PNC) was analyzed by using experimentally determined relations (1) between the PNC and the fraction of dry matter (LWR) and nitrogen in leaves, (2) between the specific leaf area (SLA) and the leaf nitrogen concentration (LNC) and (3) between the net assimilation rate (NAR) and the LNC on an area basis. A strong dependence of RGR on nitrogen concentration resulted from the increase in NAR, LWR and SLA with increasing PNC. A curvilinear relationship between RGR and PNC gave an optimum curve for nitrogen productivity against PNC. |
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| Keywords: | Leaf weight ratio net assimilation rate model nitrogen productivity Polygonum cuspidatum relative growth rate specific leaf area |
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