The use of hand-held chlorophyll meters as a tool to assess the nitrogen status and to guide nitrogen fertilization of potato crop |
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| Authors: | G. Gianquinto J. P. Goffart M. Olivier G. Guarda M. Colauzzi L. Dalla Costa G. Delle Vedove J. Vos D. K. L. Mackerron |
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| Affiliation: | (1) Dipartimento di Agronomia Ambientale e Produzioni Vegetali (DAAPV), University of Padova, Italy;(2) Département Production Végétale, Centre de Recherches Agronomique, Gembloux (CRAGx), Belgium;(3) Istituto di Genetica e Sperimentazione Agraria ‘N. Strampelli’ (IGSA), Lonigo, Italy;(4) Dipartimento di Produzione Vegetale e Tecnologie Agrarie (DPVTA), University of Udine, Italy;(5) Crop and Weed Ecology, Wageningen University (WU), Wageningen, The Netherlands;(6) Scottish Crop Research Institute (SCRI), Dundee, Scotland, UK |
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| Abstract: | Summary Fifteen experiments were carried out in different sites of Italy, Belgium, Scotland and The Netherlands from 1995 to 1999 to study the possible use of chlorophyll meter to assess the nitrogen status and to guide nitrogen fertilization of the potato crop. The results are gathered here and reviewed together with available information in literature. The paper deals with measuring principles of chlorophyll meter; relation between chlorophyll meter readings and analytical measurements of chlorophyll, analytical measurements of nitrogen, crop nitrogen content, tuber yield, and physiological processes in leaves; variations in chlorophyll meter readings related to nitrogen supply, potato cultivar, crop management, and sampling methods; use of chlorophyll meter readings for decision making in the management of supplemental nitrogen fertilization (assessment of chlorophyll meter critical threshold, plant response to addition of supplementary N). |
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| Keywords: | Solarium tuberosum decision tool dynamic optimization of nutrient supply |
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