engleski

Effects of organic fertilization on manganese content and dynamics in grapevine leaf (Vitis vinifera L.) on calcareous soil

Manganese itself is known to be important in the photosynthetic split of water and also as an activator of many enzymes, and activator of decarboxilase in Crebs cycle. The aim of investigation was to determine effect of different organic fertilization on manganese content and dynamics in grapevine leaf (vitis vinifera l.) on calcareous soilThe investigation was set up in northwestern Croatia, in a 10-year old vineyard, on cv. Sauvignon White, grafted on Kobber 5BB rootstock. The trial was performed according to randomize complete block design with 6 treatments (unfertilized, farmyard manure 20 t ha-1 and 40 t ha-1, peat 20 000 L ha-1 and 40 000 L ha-1, NPK 5-20-30 500 kg ha-1+2x100 kg UREA kg ha-1) in 4 repetitions. Significantly the highest amount of manganese in the first sampling (flowering) was deterined in control treatment (30.50 mg Mn kg-1 dry matter), and significantly the lowest value in the treatment of NPK fertilizer 500 kg ha- 1+2x100 kg UREA kg ha-1 (18.50 mg Mn kg-1 dry matter). In the second sampling (two weeks after flowering) between treatments was not statistically significant difference. In the third sampling statistically the highest value was determined in the treatments with 20 t ha-1 and 40 t ha-1 of farmyard manure (73.50 and 72.75 mg Mn kg-1 dry matter, respectively). Significantly the lowest value in the third sampling was determined in the treatment with 40 000 L ha-1 peat (58.25 mg Mn kg-1 dry matter).Considering to sampling time in all treatments except control tretmant manganese leaf content has incerased from the first to the third sampling. Research results show that the application of organic fertilizers has strong influence on the content and dynamics of manganese in grapevine leaves.

calcareous soil; farmyard manure; manganese; peat; Vitis vinifera

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