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Journal of Biological Sciences

Year: 2006 | Volume: 6 | Issue: 6 | Page No.: 1011-1016
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Authors

Semiha Guler

Idris Macit

Aysen Koc

Hayriye Ibrikci

Keywords

Research Article

Estimating Leaf Nitrogen Status of Strawberry by Using Chlorophyll Meter Reading

Semiha Guler, Idris Macit, Aysen Koc and Hayriye Ibrikci
Measurement of leaf N through chlorophyll meter reading is of high importance to monitor leaf N status of plant throughout growing season. In present study, five short-day strawberry (Fragaria x ananassa Duch) cultivars including Sweet Charlie, Redlans Hope, Kabarla, Festival and Camarosa, were grown in 2003-2004 growing season to investigate the possibility of usage of Chlorophyll (CHL) meter reading to estimate leaf N content. Fully matured leaves were used for related measurements. Leaf CHL was measured by using SPAD 502 chlorophyll meter. There was significant correlation (r = +0.84, p<0.001) between leaf N and CHL reading regardless of the cultivars. The results indicated that leaf N and CHL contents of strawberry cultivars showed great variability. The cultivar containing highest leaf N also contained the highest CHL. Kabarla had the highest leaf N (2.46% N) and CHL (33.90 unit), followed by Redlans Hope (2.18%N, 31.65 unit). Sweet Charlie had the lowest leaf N (1.68% N) and CHL reading values (29.30 unit). Leaf N status of the cultivars used in this experiment can be estimated using the regression equations belong to each cultivar. However, due to high significant correlation between leaf N and CHL reading value irrespective of cultivar, leaf N content of any cultivar can be estimated by using the regression equation y = -2.1309+0.1344x, where x is CHL reading value and y is leaf N.
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