Response of growth of tomato to phosphorus and nitrogen nutrition
| Autor: | Leo F. M. Marcelis, C.C. de Groot, R. Van Den Boogaard, Hans Lambers |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2004 |
| Předmět: |
Relative growth rate (RGR)
Net assimilation rate (NAR) Cytokinin chemistry.chemical_element food and beverages Leaf area ratio Horticulture Biology Dry-mass partitioning biology.organism_classification Nitrogen PRI Agrosysteemkunde Lycopersicon Nutrient Leaf area ratio (LAR) chemistry Nutrient limitation Relative growth rate Agrosystems |
| Zdroj: | Acta Horticulturae (2004) 633 Acta Horticulturae, 357-364 ISSUE=633;STARTPAGE=357;ENDPAGE=364;ISSN=05677572;TITLE=Acta Horticulturae |
| ISSN: | 0567-7572 |
| Popis: | A detailed growth analysis has been conducted to unravel the separate effects of nitrogen and phosphorus nutrition on growth of young tomato plants (Lycopersicon esculentum Mill. cv. Capita) and to study their interaction. We show that relative growth rate increased sharply with increasing plant P concentration before it levelled off, resulting in a broad plateau, while the response of relative growth rate (RGR, mg g-1 day-1) to increasing plant N concentration was gradual and levelled off at high N concentrations, resulting in a small plateau. Possible causes of this different shaped response are discussed. Furthermore, we show that the importance of net assimilation rate (NAR, g m-2 day-1) and leaf area ratio (LAR, m2 kg-1) in explaining the effects of N and P on growth may depend on the severity of the nutrient limitation. Finally we discuss the hypothesis that the regulation of the measured increase in dry-mass partitioning to the roots with decreasing N and P supply and the measured decrease in plant N concentration with decreasing P supply may be mediated by cytokinins. This paper summarises and discusses some of the data described in earlier papers (De Groot et al., 2001; 2002; 2003) on the regulation of growth by P and N nutrition |
| Databáze: | OpenAIRE |
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