engleski

Effect of nitrogen fertilization under reduced soil tillage on chloroplast pigments concentration in leaves of winter wheat

The scope of this research was to determine concentration of chloroplast pigments in the winter wheat leaves influenced nitrogen fertilization under reduced soil tillage. The research for winter-wheat has been conducted at the Virovitica-Podravina County in 2008/2009 , with six different nitrogen rate (controla-0 kg N ha-1, 30 kg N ha-1, 60 kg N ha-1, 90 kg N ha- 1, 120 kg N ha-1, 150 kg N ha-1, respectively) with following continuous soil tillage treatments: CT – conventional soil tillage, based on mouldboard ploughing ; DH – multiple pass diskharrowing ; and NT – No-tillage. The chloroplast pigments have been measured in stem extension (after Feekes: 6.0). This research showed that chlorophylls are very sensitive to changes in nitrogen content: concentration of chlorophyll a, chlorophyll b, chlorophyll (a+b) and carotenoids increased with higher fertilization rate. Tillage did not significantly effect on concentration of chloroplast pigments.

reduced soil tillage ; nitrogen fertilization ; chloroplast pigments ; winter wheat

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