Abstract
Aims: The effects of cluster thinning on yield and extractability parameters of Syrah and Tempranillo grapes, as well as the chromatic characteristics of the wines obtained in three consecutive seasons. Methods and results: Grapes of Vitis vinifera L. var. Tempranillo and Syrah were harvested from a commercial vineyard in Jumilla. Two treatments were evaluated: (a) cluster thinned, where in every shoot all the clusters, except the basal one, were removed just before veraison; (b) unthinned control. Yield, physicochemical and extractability parameters were studied in the grapes. Vinifications were made from these grapes, and chromatic parameters were studied at the end of alcoholic fermentation. Results showed that cluster-thinned vines performed better than control vines during the three consecutive years of the experiment, although the best results were obtained in the driest year (2005). The Syrah variety always provided better results than the Tempranillo variety. The cluster-thinning treatment also influenced the chromatic characteristics of the wines obtained. Conclusions: The results showed that thinning successfully reduced yield and produced an earlier harvest in the two varieties studied. The grape quality improved and, in general, wines made from cluster-thinned vines of both Syrah and Tempranillo had significantly better chromatic characteristics than control wines. Significance and impact of the study: This study demonstrate that the practice of cluster-thinning may be recommended depending on several factors, as the varieties and the climatic conditions play also a role in the extractability parameters of grapes, and therefore its use cannot be generalized.
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Claims 8
Claim · model-written summary
Cluster-thinned vines performed better than unthinned control vines during the three consecutive years of the experiment, with the best results in the driest year (2005).
- Taxon
- Vitis vinifera
Vitis viniferae3 - Material
- Tempranillo and Syrahe3
- Treatment
- cluster thinnede1
- Outcome
- performede2
- Direction
- bettere2
- Qualifier
- the best results were obtained in the driest year (2005)e4
- Comparator
- unthinned controle1
- Setting
- commercial vineyard in Jumillae3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Two treatments were evaluated: (a) cluster thinned, where in every shoot all the clusters, except the basal one, were removed just before veraison; (b) unthinned control”
e2“cluster-thinned vines performed better than control vines during the three consecutive years of the experiment”
e3“Grapes of Vitis vinifera L. var. Tempranillo and Syrah were harvested from a commercial vineyard in Jumilla”
e4“although the best results were obtained in the driest year (2005)”
Claim · model-written summary
Cluster thinning reduced grape yield in both varieties.
- Taxon
- Vitis viniferaVitis viniferae3
- Material
- Tempranillo and Syrahe3
- Treatment
- thinninge2
- Outcome
- yielde2
- Direction
- reducede2
- Comparator
- unthinned controle1
- Setting
- commercial vineyard in Jumillae3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Two treatments were evaluated: (a) cluster thinned, where in every shoot all the clusters, except the basal one, were removed just before veraison; (b) unthinned control”
e2“thinning successfully reduced yield and produced an earlier harvest in the two varieties studied”
e3“Grapes of Vitis vinifera L. var. Tempranillo and Syrah were harvested from a commercial vineyard in Jumilla”
Claim · model-written summary
Cluster thinning produced an earlier grape harvest.
- Taxon
- Vitis viniferaVitis viniferae3
- Material
- Tempranillo and Syrahe3
- Treatment
- thinninge2
- Outcome
- harveste2
- Direction
- earliere2
- Comparator
- unthinned controle1
- Setting
- commercial vineyard in Jumillae3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Two treatments were evaluated: (a) cluster thinned, where in every shoot all the clusters, except the basal one, were removed just before veraison; (b) unthinned control”
e2“thinning successfully reduced yield and produced an earlier harvest in the two varieties studied”
e3“Grapes of Vitis vinifera L. var. Tempranillo and Syrah were harvested from a commercial vineyard in Jumilla”
Claim · model-written summary
Cluster thinning improved grape quality.
- Taxon
- Vitis viniferaVitis viniferae3
- Treatment
- cluster thinnede1
- Outcome
- grape qualitye2
- Direction
- improvede2
- Comparator
- unthinned controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Two treatments were evaluated: (a) cluster thinned, where in every shoot all the clusters, except the basal one, were removed just before veraison; (b) unthinned control”
e2“The grape quality improved”
e3“Grapes of Vitis vinifera L. var. Tempranillo and Syrah were harvested from a commercial vineyard in Jumilla”
Claim · model-written summary
The Syrah variety always provided better results than the Tempranillo variety.
- Taxon
- Vitis viniferaVitis viniferae2
- Material
- Syrahe1
- Outcome
- resultse1
- Direction
- bettere1
- Comparator
- Tempranillo varietye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The Syrah variety always provided better results than the Tempranillo variety”
e2“Grapes of Vitis vinifera L. var. Tempranillo and Syrah were harvested from a commercial vineyard in Jumilla”
Claim · model-written summary
Wines made from cluster-thinned vines of Syrah and Tempranillo had significantly better chromatic characteristics than control wines.
- Taxon
- Vitis viniferaVitis viniferae2
- Material
- Syrah and Tempranilloe1
- Treatment
- cluster-thinned vinese1
- Outcome
- chromatic characteristicse1
- Direction
- bettere1
- Comparator
- control winese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“wines made from cluster-thinned vines of both Syrah and Tempranillo had significantly better chromatic characteristics than control wines”
e2“Grapes of Vitis vinifera L. var. Tempranillo and Syrah were harvested from a commercial vineyard in Jumilla”
Claim · model-written summary
The authors recommend that cluster-thinning may be used, depending on several factors.
- Taxon
- Vitis viniferaVitis viniferae2
- Outcome
- practice of cluster-thinning may be recommendede1
- Qualifier
- depending on several factorse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the practice of cluster-thinning may be recommended depending on several factors”
e2“Grapes of Vitis vinifera L. var. Tempranillo and Syrah were harvested from a commercial vineyard in Jumilla”
Claim · model-written summary
The use of cluster-thinning cannot be generalized across varieties and climatic conditions.
- Taxon
- Vitis viniferaVitis viniferae2
- Outcome
- its use cannot be generalizede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“therefore its use cannot be generalized”
e2“Grapes of Vitis vinifera L. var. Tempranillo and Syrah were harvested from a commercial vineyard in Jumilla”
The same questions in other papers
cluster · quality: general · Vitis vinifera (wine grape)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
pruning · yield · Vitis vinifera (wine grape)Positive and negative results
40 papers in the same direction as this paper · 51 in the opposite direction · 3 reporting no difference from an alternative
- negative
- negative
- positive
91 papers more in this group
See all 95 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.