The influence of foliar fertilization on chlorophyll fluorescence parameters in strawberry leaves

摘要

The chlorophyll fluorescence parameters reflect the functioning of IInd photosystem (PSII). Manystudies have shown the importance of the chlorophyll fluorescence indicators in identification ofnutrient deficiency and the others stress factors. In our study, with OS-30 (Opti-Sciences) chlorophyllfluorometer we registered, the following chlorophyll fluorescence parameters: the minimumfluorescence (F0), the maximum fluorescence (Fm), the momentary fluorescence (Ft) and ratio Fv/Fm.The effect of four foliar fertilization products on the chlorophyll fluorescence parameters in leaves tofive strawberry cultivars (Mira, Benton, Elsanta, Marmolada, Idea) was registered in four moments (atone day after foliar fertilization; at three days after foliar fertilization; at six days after foliarfertilization and at nine days after foliar fertilizations). At the end of study the highest mean values ofIInd photosystem (PSII) efficiency, and of Fv/Fm ratio were recorded on Elsanta cultivar, the highestvalue of fluorescence minimum (F0) and momentary fluorescence (Ft) were recorded on Bentoncultivar, and the fluorescence maximum (Fm) was recorded to Mira cultivar.