RELATIONSHIPS AMONG CHLOROPHYLL-METER READING VALUE, LEAF N AND YIELD OF CUCUMBER AND TOMATOES

Relationships between destructive and non-destructive nitrogen analysis were evaluated by using data obtained from cucumber and tomatoes experiments supplied with different sources and rates of nitrogen.
Leaf chlorophyll was measured by using SPAD-502 chlorophyll-meter.
Leaf sample was collected for N determination in the same day that chlorophyll-meter reading was recorded.
Regression analysis was performed on the data to find relationship among chlorophyll meter reading value, leaf N and yield.
There was a significant correlation between leaf N and chlorophyll content of tomato (r=0.470, p<0.01). Regression equation was found as y= 1.42+0.048x, where y is leaf N content, x is chlorophyll-meter reading value.
In cucumber significant correlation was found between leaf N chlorophyll content only in 2001 experiment (r=0.786, p<0.001). Regression equation was found as y= -7.52+0.280x, where y is leaf N content, x is chlorophyll-meter reading value.
These regression equations can be used to monitor N status of cucumber and tomatoes using chlorophyll-meter reading.

III Balkan Symposium on Vegetables and Potatoes

S. Güler, G. Büyük

Cucumis sativus, Lycopersicon esculentum, SPAD-502

https://doi.org/10.17660/ActaHortic.2007.729.50