Fifteen experiments have been 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 – discussed within the EU supported concerted action ‘Efficiency in Use of Resources for Optimizing Potato Production’ (EUROPP) are here gathered and reviewed together with available information in literature. The paper included several sections dealing 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 (N rate, form and placement of N fertilizers, splitting of N), environment (soil type, light intensity), potato cultivar, crop management (irrigation, previous crop residues), and sampling methods (leaf age/position, time of the day, sample size); 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).
The use of hand-held chlorophyll meters as a tool to assess the nitrogen status and to guide nitrogen fertilization of potato crop.
PROSDOCIMI GIANQUINTO, GIORGIO;
2005
Abstract
Fifteen experiments have been 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 – discussed within the EU supported concerted action ‘Efficiency in Use of Resources for Optimizing Potato Production’ (EUROPP) are here gathered and reviewed together with available information in literature. The paper included several sections dealing 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 (N rate, form and placement of N fertilizers, splitting of N), environment (soil type, light intensity), potato cultivar, crop management (irrigation, previous crop residues), and sampling methods (leaf age/position, time of the day, sample size); 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).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
