The influence of organic fertilizer on microelements content and dynamics ingrapevine leaves on calcareous soils

U vinogradarstvu gnojidbu provodimo radi povećanja prinosa i kvalitete grožđa. Cilj ovog istraživanja bio je utvrditi utjecaj organske gnojidbe na količinu i dinamiku željeza, cinka i mangana u lišću vinove loze sorte Sauvignon bijeli na karbonatnom tlu. U istraživanju je bilo uključeno šest varijanti gnojidbe (kontrola bez gnojidbe, 20t ha-1 zrelog stajskog gnoja, 40 t ha-1 zrelog stajskog gnoja, 20 000 L ha-1 kiselog treseta, 40 000 L ha-1 kiselog treseta i 500 kg ha-1 NPK 5-20-30+ 200 kg ha-1 UREE). Uzorkovanje lišća provedeno je tri puta tijekom vegetacije (cvatnja, dva tjedna poslije cvatnje i šara). U provedenom istraživanju gnojidba organskim gnojivima značajno je utjecala na količinu željeza pri gnojidbi s 40 t ha-1 stajskog gnoja, te su najveće vrijednosti utvrđene u cvatnji (136, 60 mg kg-1 Fe), a najniže u šari (86,42 mg kg-1 Fe). Također relativno najveća vrijednost cinka je utvrđena pri gnojidbi s 40 t ha-1 stajskog gnoja, a najmanja na tretmanu sa 500 kg ha-1 NPK 5-20-30+ 200 kg ha-1 UREE. Najveća vrijednost je utvrđena u šari (19,49 mg kg-1 Zn), a najniža u drugom uzorkovanju odnosno dva tjedna poslije cvatnje (16,24 mg kg-1 Zn). Najveća vrijednost mangana je utvrđena na kontrolnom tretmanu, i to u trećem uzorkovanju, odnosno šari (34,21 mg kg-1 Mn), a najniža u prvom uzorkovanju odnosno cvatnji (27,17 mg kg-1 Mn).In viticulture, we use fertilizing to increase the yield and quality of the grapes.The aim of this study was to determine the effect of organic fertilization on the amount and dynamics of iron, zinc and manganese in Sauvignon white grape leaves on carbonate soil. In the survey included 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, 500 kg ha-1NPK 5-20-30 + 200 kg ha-1 UREA) in 4 repetitions. Leaves sampling was carried out three times during the vegetation (flowering, two weeks after flowering and veraison). In the study, fertilization with organic fertilizers significantly affected the amount of iron during fertilization with 40 t ha-1 of manure, and the highest values were determined in flowering (136, 60 mg kg-1 Fe) and the lowest in batch (86.42 mg kg-1 Fe). Also, the relatively highest value of zinc was found for fertilization with 40 t ha-1 of manure and the lowest for treatment with 500 kg ha-1 NPK 5-20-30 + 200 kg ha-1 UREE. The highest value was found in the bulb (19.49 mg kg-1 Zn) and the lowest in the second sampling, two weeks after flowering (16.24 mg kg-1 Zn). The highest value of manganese was determined on the control treatment, also, the highest value was determined in the third sampling, respectively, in the sample (34.21 mg kg-1 Mn) and the lowest in the first sampling or flowering (27.17 mg kg-1 Mn)