Using foliar applications of magnesium and potassium to improve yields and some qualitative parameters of vine grapes (Vitis vinifera L.)

To chci

In a three-year field experiment (2011-2013) we assessed the effect of magnesium (MgSO4) and potassium (K2SO4) applied as foliar applications both separately (3.86 kg Mg/ha or 12.44 kg K/ha) and in combination (1.93 kg Mg/ha + 6.22 kg K/ha) on yields of grapes of cv. Zweigelt and some qualitative parameters of the grapes. The applications were repeated 4 times in stages BBCH 15-19; 55; 75 and 83. The experiment was carried out on soil well supplied with Mg and K in the subsoil layer. In terms of average 3-year results the grape yields were by 11.2% (MgSO4), 13.9% (K2SO4) and 6.6% (MgSO4 + K2SO4) significantly higher than the untreated control. The sugar content of grapes (sum of glucose and fructose) was lower (mostly insignificantly) by 0.5-4.3% in all the fertilized treatments than in the untreated control. Fertilization had no significant impact on the pH of must (juice) and ranged between 3.02 and 3.25. The content of titratable acids in the must ranged insignificantly between 8.73 and 10.86 g/L, and average values were the highest in the untreated control. On the basis of these results it is evident that separate applications of Mg and K have a positive effect, in particular in that they stimulate grape yields, and at the same time the effect of the year is significant. … celý popis

Podrobná bibliografie

Hlavní autor

Tereza Zlámalová

Další autoři

Jakub Elbl, Mojmír Baroň , H. Bělíková, Lubomír Lampíř , Jaroslav Hlušek, 1950- , Tomáš Lošák, 1975-

Typ dokumentu

Články

Fyzický popis

6 ilustrací

Publikováno v

Plant, Soil and Environment. -- ISSN 1214-1178. -- Roč. 61, č. 10 (2015), s. 451-457

Témata

FIELD EXPERIMENTATION

VITIS VINIFERA

CULTIVATION

SITE FACTORS

PHYSIOGRAPHIC FEATURES

METEOROLOGICAL FACTORS

FERTILIZER APPLICATION

SPRING

APPLICATION RATES

FOLIAR APPLICATION

TREATMENT DATE

PLANT DEVELOPMENTAL STAGES

Bud formation

FRUITING

CROP YIELD

GRAPES

GRAPE MUST

CHEMICAL COMPOSITION

QUALITATIVE ANALYSIS

CARBOHYDRATE CONTENT

GLUCOSE

FRUCTOSE

INORGANIC ACIDS

ORGANIC ACIDS

polní pokusy

réva vinná

kultivace

faktory prostředí

fyziografické charakteristiky

meteorologické prvky

hnojení

jaro

použité dávky

hnojení na list

termín ošetření

vývojová stádia rostlin

tvorba pupenů

tvorba plodů

výnos plodin

hrozny

hroznový mošt

chemické složení

kvalitativní analýza

obsah glycidů

glukóza

fruktóza

anorganické kyseliny

organické kyseliny

Nosislav (Česko)

Popis jednotky

6 tabulek

Bibliografie

Bibliografie na s. 456-457,