Abstract
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.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
Foliar magnesium (MgSO4) significantly increased grape yields by 11.2% compared with the untreated control.
- Taxon
- Vitis vinifera L.
Vitis viniferat0 - Treatment
- magnesium (MgSO4)e0
- Outcome
- grape yieldse1
- Direction
- highere1
- Value
- 11.2%e1
- Comparator
- untreated controle1
- Setting
- field experimente5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“vine grapes (Vitis vinifera L.)”
e0“magnesium (MgSO4) and potassium (K2SO4) applied as foliar applications both separately (3.86 kg Mg/ha or 12.44 kg K/ha)”
e1“the grape yields were by 11.2% (MgSO4), 13.9% (K2SO4) and 6.6% (MgSO4 + K2SO4) significantly higher than the untreated control”
e5“In a three-year field experiment (2011-2013)”
Claim · model-written summary
Foliar potassium (K2SO4) significantly increased grape yields by 13.9% compared with the untreated control.
- Taxon
- Vitis vinifera L.Vitis viniferat0
- Treatment
- potassium (K2SO4)e0
- Outcome
- grape yieldse1
- Direction
- highere1
- Value
- 13.9%e1
- Comparator
- untreated controle1
- Setting
- field experimente5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“vine grapes (Vitis vinifera L.)”
e0“magnesium (MgSO4) and potassium (K2SO4) applied as foliar applications both separately (3.86 kg Mg/ha or 12.44 kg K/ha)”
e1“the grape yields were by 11.2% (MgSO4), 13.9% (K2SO4) and 6.6% (MgSO4 + K2SO4) significantly higher than the untreated control”
e5“In a three-year field experiment (2011-2013)”
Claim · model-written summary
Combined foliar magnesium and potassium significantly increased grape yields by 6.6% compared with the untreated control.
- Taxon
- Vitis vinifera L.Vitis viniferat0
- Treatment
- magnesium (MgSO4) and potassium (K2SO4)e0
- Outcome
- grape yieldse1
- Direction
- highere1
- Value
- 6.6%e1
- Comparator
- untreated controle1
- Setting
- field experimente5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“vine grapes (Vitis vinifera L.)”
e0“magnesium (MgSO4) and potassium (K2SO4) applied as foliar applications both separately (3.86 kg Mg/ha or 12.44 kg K/ha)”
e1“the grape yields were by 11.2% (MgSO4), 13.9% (K2SO4) and 6.6% (MgSO4 + K2SO4) significantly higher than the untreated control”
e5“In a three-year field experiment (2011-2013)”
Claim · model-written summary
Fertilized treatments lowered grape sugar content by 0.5-4.3% compared with the untreated control, mostly insignificantly.
- Taxon
- Vitis vinifera L.Vitis viniferat0
- Treatment
- fertilized treatmentse2
- Outcome
- sugar content of grapese2
- Direction
- lowere2
- Value
- 0.5-4.3%e2
- Qualifier
- mostly insignificantlye2
- Comparator
- untreated controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“vine grapes (Vitis vinifera L.)”
e2“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”
Claim · model-written summary
Fertilization had no significant impact on the pH of must.
- Taxon
- Vitis vinifera L.Vitis viniferat0
- Treatment
- Fertilizatione3
- Outcome
- pH of muste3
- Direction
- no significant impacte3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“vine grapes (Vitis vinifera L.)”
e3“Fertilization had no significant impact on the pH of must (juice)”
Claim · model-written summary
Titratable acid content of must ranged insignificantly between 8.73 and 10.86 g/L across treatments.
- Taxon
- Vitis vinifera L.Vitis viniferat0
- Outcome
- content of titratable acids in the muste4
- Value
- 8.73 and 10.86 g/Le4
- Qualifier
- ranged insignificantlye4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“vine grapes (Vitis vinifera L.)”
e4“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”
Claim · model-written summary
Average titratable acid values in must were highest in the untreated control.
- Taxon
- Vitis vinifera L.Vitis viniferat0
- Outcome
- average valuese4
- Direction
- higheste4
- Qualifier
- titratable acids in the muste4
- Comparator
- untreated controle4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“vine grapes (Vitis vinifera L.)”
e4“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”
Claim · model-written summary
The year had a significant effect on grape yield and quality in this three-year trial.
- Taxon
- Vitis vinifera L.Vitis viniferat0
- Outcome
- effect of the yeare6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“vine grapes (Vitis vinifera L.)”
e6“the effect of the year is significant”
The same questions in other papers
magnesium atom · yield · Vitis vinifera (wine grape)Results agree
1 paper in the same direction as this paper
- positive
fertilization · soil: chemistry · Vitis vinifera (wine grape)Positive and negative results
1 paper in the same direction as this paper · 3 in the opposite direction
- no effect
- positive
- positive
1 paper more in this group
See all 5 papers →potassium · yield · Vitis vinifera (wine grape)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.