engleski

Relationship between plant and soil potassium on calcareous vineyard soils

Grapevine is a plant species that requires high potassium levels. Soil potassium uptake is strongly dependent on the status of other soil cations, such as calcium and magnesium, especially on calcareous soils. Research was done during 2006 on three fully productive vineyards (I, II and III). The vineyards were a significant source of variability for all investigated parameters: pH value, soil and leaf potassium status, and soil active lime. The determined soil potassium values ranged from 142.5 to 197.1 mg K2O kg-1, soil lime content was from 18.82 to 28.44 % CaO, and from 1.05 to 1.17 % K in leaves, while the leaf potassium content in the vineyards that contain the highest soil potassium was significantly lower. But, the best quality grapes were harvested vineyard II. Leaf sampling time also influenced the leaf potassium status. Leaf potassium content increased at harvest time. Research on the relationship between potassium in soil and in leaf will be continued in the coming years to obtain more accurate data.

potassium; vine plant; calcareous soil; active lime; rootstock

Rad je prezentiran na skupu The VII. Alps-Adria Scientific Workshop, održanom od 28.04.-02.05.2008., Stara Lesna, Slovačka.