Abstract
In the Brazilian Southeast, 'Syrah' grape harvested during the winter reaches better quality index than those from summer harvest. However, the management of annual double pruning to produce two grapevine growth cycles (vegetative cycle: spring – summer; reproductive cycle: autumn – winter) has increased the vineyard production costs and the vine reserve accumulation can be compromised. This study had two main objectives to improve the winter cultivation: i) to validate single pruning carried out only in summer (February) (experiment 1); to increase the reserve accumulation by ethephon (ethrel) sprayed two months before yield pruning (experiment 2). Both experiments were carried out in south of Minas Gerais State using three years old field-grown 'Syrah' grapevines grafted onto '1103 Paulsen' and trained in a vertical shoot position. The results from experiment 1 showed that grapevines pruned in summer also need to be pruned during the winter after grape harvest to avoid bud infertility during the following autumn-winter season. Single pruning reduced the starch contents in shoots, trunks and roots sampled before yield pruning and the commercial grape harvest was completely unavailable due to unfruitful shoots. On the other hand, the autumn-winter cycle was improved by ethephon sprayed in the previous vegetative growing cycle (summer cycle). During the autumn-winter cycle, sprayed grapevines showed higher starch content in trunks, high vegetative vigor and the yield and grape quality were not negatively affected.
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Claims 7
Claim · model-written summary
Single summer pruning led to bud infertility in the following autumn-winter season.
VitisNot reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grapevines pruned in summer also need to be pruned during the winter after grape harvest to avoid bud infertility during the following autumn-winter season”
Claim · model-written summary
Single pruning reduced starch content in shoots, trunks and roots before yield pruning.
- Organ / stage
- shoots, trunks and rootse0
- Treatment
- Single pruninge0
- Outcome
- starch contents in shoots, trunks and rootse0
- Direction
- reducede0
- Qualifier
- before yield pruninge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Single pruning reduced the starch contents in shoots, trunks and roots sampled before yield pruning”
t0“Syrah”
e1“grapevines pruned in summer also need to be pruned during the winter after grape harvest to avoid bud infertility during the following autumn-winter season”
Claim · model-written summary
Single pruning left the commercial grape harvest unavailable because shoots were unfruitful.
- Treatment
- Single pruninge2
- Outcome
- commercial grape harveste0
- Direction
- completely unavailablee0
- Qualifier
- due to unfruitful shootse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the commercial grape harvest was completely unavailable due to unfruitful shoots”
t0“pruning”
e1“grapevines pruned in summer also need to be pruned during the winter after grape harvest to avoid bud infertility during the following autumn-winter season”
e2“Single pruning reduced the starch contents in shoots, trunks and roots sampled before yield pruning”
Claim · model-written summary
Ethephon applied in the preceding summer improved the autumn-winter cycle.
- Treatment
- ethephon sprayed in the previous vegetative growing cycle (summer cycle)e0
- Outcome
- autumn-winter cyclee0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the autumn-winter cycle was improved by ethephon sprayed in the previous vegetative growing cycle (summer cycle)”
t0“Syrah”
e1“grapevines pruned in summer also need to be pruned during the winter after grape harvest to avoid bud infertility during the following autumn-winter season”
Claim · model-written summary
Ethephon sprayed grapevines had higher trunk starch content during the autumn-winter cycle.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During the autumn-winter cycle, sprayed grapevines showed higher starch content in trunks”
Claim · model-written summary
Ethephon sprayed grapevines had high vegetative vigor in the autumn-winter cycle.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During the autumn-winter cycle, sprayed grapevines showed higher starch content in trunks, high vegetative vigor”
Claim · model-written summary
Ethephon spraying did not negatively affect yield or grape quality.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the yield and grape quality were not negatively affected”
t0“ethephon”
e1“grapevines pruned in summer also need to be pruned during the winter after grape harvest to avoid bud infertility during the following autumn-winter season”
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