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How nitrogen form and concentration affect growth, nutrient accumulation and photosynthetic performance of Olea europaea L. (cv. ‘Kalamon’).
- Source :
-
Scientia Horticulturae . Apr2017, Vol. 218, p23-29. 7p. - Publication Year :
- 2017
-
Abstract
- A greenhouse experiment was conducted, in order to study the effect of nitrogen (N) form (NO 3 − , NH 4 + , urea, NH 4 + + NO 3 − ) and concentration (1, 8 and 16 mM) on growth, mineral nutrition and photosynthetic performance of olive plants ( Olea europaea L., cv. ‘Kalamon’). Our data indicate that when plants at high supply (16 mM) received urea as N source better growth performance was recorded, compared to the cases olive plants received other N forms; however, at low to medium N supply (1 or 8 mM) better plant growth performance observed when they were fertilized with NO 3 − –N. Total N uptake at 16 mM was significantly lower when plants received NO 3 − –N, in comparison to the other N forms. NO 3 − form at 16 mM resulted in lower total uptake of P, Fe, Mn and Zn, compared to the other treatments. On the other hand, NH 4 + -N at high N supply (16 mM) resulted in lower total uptake of Ca and Mg. However, significantly higher K uptake was found when plants were treated with NH 4 + , at high N rate (16 mM). High N supply in the form of NH 4 + -N significantly inhibited net photosynthetic rate (A), although the chlorophyll fluorescence (as an indicator of the function of PSII) did not significantly differ among the N treatments. In conclusion, urea-N proved to be the most appropriate N form for the mineral nutrition of the olive cultivar ‘Kalamon’; thus, it should be preferred as a source of N in olive groves receiving high N fertilizations. [ABSTRACT FROM AUTHOR]
- Subjects :
- *OLIVE
*PLANT nutrients
*PHOTOSYNTHESIS
*PHOTOSYNTHETIC rates
*CHLOROPHYLL spectra
Subjects
Details
- Language :
- English
- ISSN :
- 03044238
- Volume :
- 218
- Database :
- Academic Search Index
- Journal :
- Scientia Horticulturae
- Publication Type :
- Academic Journal
- Accession number :
- 121819431
- Full Text :
- https://doi.org/10.1016/j.scienta.2017.02.012