Abstract
Abstract Effects of soil type and nitrogen (N) fertilizer–application rates on the nutrient composition of grapevine ( Vitis vinifera L. cv. Riesling) leaves during a growing cycle were compared with the composition of the resulting grape juice. Grapevines were planted in 75 L containers that had been installed in a vineyard and filled with three different vineyard soils (loess, shell lime, and Keuper). Four typical levels of N fertilizer (40, 80, 120, and 160 kg N ha –1 ) were applied. Elemental composition of mature leaves sampled seven times during the growing cycle as well as of the extracted grape juice was analyzed. The time of sampling affected all measured elements (C, N, Ca, K, P, Mg, S, Fe, Zn, Mn, and B) in the leaves. Nitrogen‐fertilizer rate affected the concentrations of all elements except Ca and Mg, while the soil type had significant effects on elemental composition of the leaves with the exception of N, B, and Ca. Soil type had a significant effect on K, S, Mn, and B in the grape juice. Increasing rates of N fertilizer increased C concentration in the grape juice significantly and affected its elemental composition similar to the effects in leaves. This may be explained with the role of leaves as the source for supplying the grapes during ripening via phloem transport. Cluster analysis for the elemental composition of soils, leaves, and grape juice revealed no consistent relationships indicating that other soil characteristics in addition to the mineral concentration influence the elemental composition of grapevine leaves and grape juice.
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Claims 7
Claim · model-written summary
Sampling time affected every measured leaf element.
VitisNot reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The time of sampling affected all measured elements (C, N, Ca, K, P, Mg, S, Fe, Zn, Mn, and B) in the leaves.”
t0“grapevine”
Claim · model-written summary
Nitrogen fertilizer rate affected all leaf elements except calcium and magnesium.
- Organ / stage
- leavese1
- Treatment
- Nitrogen‐fertilizer ratee0
- Outcome
- concentrations of all elements except Ca and Mge0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen‐fertilizer rate affected the concentrations of all elements except Ca and Mg”
t0“grapevine”
e1“The time of sampling affected all measured elements (C, N, Ca, K, P, Mg, S, Fe, Zn, Mn, and B) in the leaves.”
Claim · model-written summary
Soil type significantly affected leaf elemental composition except nitrogen, boron and calcium.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the soil type had significant effects on elemental composition of the leaves with the exception of N, B, and Ca.”
t0“grapevine”
Claim · model-written summary
Soil type significantly affected potassium, sulfur, manganese and boron in grape juice.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil type had a significant effect on K, S, Mn, and B in the grape juice.”
t0“grapevine”
Claim · model-written summary
Higher nitrogen fertilizer rates increased carbon concentration in grape juice.
- Treatment
- Increasing rates of N fertilizere0
- Outcome
- C concentration in the grape juicee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing rates of N fertilizer increased C concentration in the grape juice significantly”
t0“grapevine”
Claim · model-written summary
Nitrogen fertilizer also affected juice elemental composition similarly to leaf composition.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“affected its elemental composition similar to the effects in leaves.”
t0“grapevine”
e1“Increasing rates of N fertilizer increased C concentration in the grape juice significantly”
Claim · model-written summary
Cluster analysis found no consistent relationships among soil, leaf and juice elemental compositions.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cluster analysis for the elemental composition of soils, leaves, and grape juice revealed no consistent relationships”
t0“grapevine”
The same questions in other papers
fertilization · molecular: metabolites · VitisPositive and negative results
44 papers in the same direction as this paper · 7 in the opposite direction · 1 reporting no difference from an alternative
- positive
- no effect
- negative
49 papers more in this group
See all 53 papers →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.