Published in Scientific Papers. Series A. Agronomy, Vol. LXVIII, Issue 2
Written by Viliana VASILEVA, Nataliya PETROVSKA, Emil VASILEV
One of the most important factors determining productivity is the photosynthesis process. The work aimed at to find the chlorophyll content in leaves of maize hybrids from two vegetation groups. Maize hybrids FAO 500-599 (Kneja 560, Kneja 564, Kneja 570A, Kneja 572 and KWS Camillo), and FAO 600-699 (Kneja 648, Kneja 649, Kneja 650A, Kneja 650 and Kneja 683) were tested in field conditions and no irrigation. Chlorophyll 'a’ and chlorophyll 'b’ were determined in green leaf samples 60 DAS. The total chlorophyll a+b and chlorophyll 'a’ to chlorophyll 'b’ ratio was calculated. Generally, the values for chlorophyll concentration were found higher for the maize hybrids FAO 600-699 group. The exceeding compared to FAO 500-599 group was for chlorophyll 'a’ by 12.53%, for chlorophyll 'b’ by 9.38% and for total chlorophyll by 11.47%, respectively. The chlorophyll 'a’ to chlorophyll 'b’ ratio was relatively similar for the hybrids from two groups. It was concluded the highest total chlorophyll concentration in maize hybrids was found in Kneja 648 (5.39 mg/g) and Kneja 560 (4.49 mg/g).
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