Abstract
Grapevines (Vitis vinifera L.) are one of the most important horticultural crops world-wide. In the southern U.S. region, hot and humid climate accompanied by high pest pressure requires high levels of labor and pesticide inputs, making open field table grape production unsustainable. Previous research at University of Arkansas has demonstrated that table grape production under high tunnels (HTs) is a viable option to overcome biotic and abiotic challenges in the region. This project evaluated two HTs established in Arkansas. In the spring of 2014, at Fayetteville, three table grape cultivars (Faith, Gratitude, and Jupiter) were established in an 8 x 61m Haygrove Super Solo HT. In the spring of 2017, at Cabot, three table grape cultivars (Gratitude, Hope, and Jupiter) were established in an 8 x 76m Haygrove Multi-bay HT. Both tunnels had the same trellis systems: modified double high cordon on the east and west side, MDHCW and MDHCE, and Geneva double curtain in the middle, GDC. The objectives of this study were to evaluate trellis systems on vine performance and yield characteristics and to evaluate cluster thinning responses for crop load management. In 2018 and 2019 cluster thinning was implemented during different stages of fruit development (pea-size and onset of veraison) to control excessive yields. Two treatments were applied to Fayetteville vines: no cluster removal and clusters thinned at pea-size. At Cabot, vines were treated with three treatments: no cluster removal, pea-size, and cluster removal at the onset of veraison. In 2018, at Fayetteville, the yield for ‘Jupiter’ was 22.28 kg per vine and with 90 clusters per vine. In 2019, yield per vine increased to 42.50 kg and the cluster count rose to 197 clusters per vine. In 2018 at Cabot, the year after plating, ‘Jupiter’ had a yield of 10.84 kg per vine with 39.40 clusters per vine. In 2019, ‘Jupiter’ had higher yield than the previous year (26.89 kg) per vine. The cluster number also increased to 157.07 clusters per vine. Cluster thinning during either year of the study did not reduce yields. At Fayetteville during both years of this project, a CIRAS-3 portable CO2/H2O gas analyzer was used, three times per growing season (June, July, and August) on the cultivar Faith. In 2018, assimilation (A) rate was significantly higher in July (25.17 µmol CO2 m-2 s-1) than June and August (14.01 and 13.24 µmol CO2 m-2 s-1, respectively). During the two years of the study, weather data were also collected utilizing a Watchdog 2700 series weather station to evaluate the HT microclimate and compare it to open-field conditions. The microclimate temperatures inside the HT were 1-3 ⁰C warmer compared to open-field conditions. Daily light integral (DLI) varied throughout the growing season, but generally was lower inside the high tunnel. The results from this data has shown that table grape production under HT systems is feasible and results in increased yields but may require increased labor inputs due to excessive vigor and increased productivity of vines.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nd. 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 15
Claim · model-written summary
At Fayetteville in 2018, Jupiter yielded 22.28 kg per vine.
- Taxon
- Vitis vinifera L.
Vitis viniferae1 - Material
- Jupitere0
- Outcome
- yielde0
- Value
- 22.28 kg per vinee0
- Qualifier
- 2018e0
- Setting
- Fayettevillee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2018, at Fayetteville, the yield for ‘Jupiter’ was 22.28 kg per vine and with 90 clusters per vine.”
e1“Grapevines (Vitis vinifera L.)”
Claim · model-written summary
At Fayetteville in 2018, Jupiter had 90 clusters per vine.
- Taxon
- Vitis vinifera L.Vitis viniferae1
- Material
- Jupitere0
- Outcome
- clusters per vinee0
- Value
- 90 clusters per vinee0
- Qualifier
- 2018e0
- Setting
- Fayettevillee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2018, at Fayetteville, the yield for ‘Jupiter’ was 22.28 kg per vine and with 90 clusters per vine.”
e1“Grapevines (Vitis vinifera L.)”
Claim · model-written summary
At Fayetteville in 2019, Jupiter yield increased to 42.50 kg per vine.
- Taxon
- Vitis vinifera L.Vitis viniferae2
- Material
- Jupitere1
- Outcome
- yield per vinee0
- Direction
- increasede0
- Value
- 42.50 kge0
- Qualifier
- 2019e0
- Setting
- Fayettevillee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2019, yield per vine increased to 42.50 kg and the cluster count rose to 197 clusters per vine.”
e1“In 2018, at Fayetteville, the yield for ‘Jupiter’ was 22.28 kg per vine”
e2“Grapevines (Vitis vinifera L.)”
Claim · model-written summary
At Fayetteville in 2019, Jupiter cluster count rose to 197 per vine.
- Taxon
- Vitis vinifera L.Vitis viniferae2
- Material
- Jupitere1
- Outcome
- cluster counte0
- Direction
- rosee0
- Value
- 197 clusters per vinee0
- Qualifier
- 2019e0
- Setting
- Fayettevillee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2019, yield per vine increased to 42.50 kg and the cluster count rose to 197 clusters per vine.”
e1“In 2018, at Fayetteville, the yield for ‘Jupiter’ was 22.28 kg per vine”
e2“Grapevines (Vitis vinifera L.)”
Claim · model-written summary
At Cabot in 2018, Jupiter yielded 10.84 kg per vine.
- Taxon
- Vitis vinifera L.Vitis viniferae1
- Material
- Jupitere0
- Outcome
- yielde0
- Value
- 10.84 kg per vinee0
- Qualifier
- 2018e0
- Setting
- Cabote0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2018 at Cabot, the year after plating, ‘Jupiter’ had a yield of 10.84 kg per vine with 39.40 clusters per vine.”
e1“Grapevines (Vitis vinifera L.)”
Claim · model-written summary
At Cabot in 2018, Jupiter had 39.40 clusters per vine.
- Taxon
- Vitis vinifera L.Vitis viniferae1
- Material
- Jupitere0
- Outcome
- clusters per vinee0
- Value
- 39.40 clusters per vinee0
- Qualifier
- 2018e0
- Setting
- Cabote0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2018 at Cabot, the year after plating, ‘Jupiter’ had a yield of 10.84 kg per vine with 39.40 clusters per vine.”
e1“Grapevines (Vitis vinifera L.)”
Claim · model-written summary
At Cabot in 2019, Jupiter had higher yield than the previous year, 26.89 kg per vine.
- Taxon
- Vitis vinifera L.Vitis viniferae2
- Material
- Jupitere0
- Outcome
- yielde0
- Direction
- highere0
- Value
- 26.89 kge0
- Qualifier
- 2019e0
- Comparator
- previous yeare0
- Setting
- Cabote1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2019, ‘Jupiter’ had higher yield than the previous year (26.89 kg) per vine.”
e1“In 2018 at Cabot, the year after plating”
e2“Grapevines (Vitis vinifera L.)”
Claim · model-written summary
At Cabot in 2019, Jupiter cluster number increased to 157.07 per vine.
- Taxon
- Vitis vinifera L.Vitis viniferae3
- Material
- Jupitere1
- Outcome
- cluster numbere0
- Direction
- increasede0
- Value
- 157.07 clusters per vinee0
- Qualifier
- 2019e1
- Setting
- Cabote2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cluster number also increased to 157.07 clusters per vine.”
e1“In 2019, ‘Jupiter’ had higher yield than the previous year (26.89 kg) per vine.”
e2“In 2018 at Cabot, the year after plating”
e3“Grapevines (Vitis vinifera L.)”
Claim · model-written summary
Cluster thinning did not reduce yields in either study year.
- Taxon
- Vitis vinifera L.Vitis viniferae1
- Treatment
- Cluster thinninge0
- Outcome
- yieldse0
- Direction
- did not reducee0
- Qualifier
- during either year of the studye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cluster thinning during either year of the study did not reduce yields.”
e1“Grapevines (Vitis vinifera L.)”
Claim · model-written summary
Faith assimilation in July 2018 was significantly higher than June and August, at 25.17 µmol CO2 m-2 s-1.
- Taxon
- Vitis vinifera L.Vitis viniferae2
- Material
- Faithe1
- Outcome
- assimilation (A) ratee0
- Direction
- highere0
- Value
- 25.17 µmol CO2 m-2 s-1e0
- Qualifier
- 2018e0
- Comparator
- June and Auguste0
- Setting
- Fayettevillee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2018, assimilation (A) rate was significantly higher in July (25.17 µmol CO2 m-2 s-1) than June and August (14.01 and 13.24 µmol CO2 m-2 s-1, respectively).”
e1“At Fayetteville during both years of this project, a CIRAS-3 portable CO2/H2O gas analyzer was used, three times per growing season (June, July, and August) on the cultivar Faith.”
e2“Grapevines (Vitis vinifera L.)”
Claim · model-written summary
Faith assimilation in June 2018 was 14.01 µmol CO2 m-2 s-1, below July.
- Taxon
- Vitis vinifera L.Vitis viniferae2
- Material
- Faithe1
- Outcome
- assimilation (A) ratee0
- Direction
- lowerinferrede0
- Value
- 14.01e0
- Qualifier
- Junee0
- Comparator
- Julye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2018, assimilation (A) rate was significantly higher in July (25.17 µmol CO2 m-2 s-1) than June and August (14.01 and 13.24 µmol CO2 m-2 s-1, respectively).”
e1“on the cultivar Faith.”
e2“Grapevines (Vitis vinifera L.)”
Claim · model-written summary
Faith assimilation in August 2018 was 13.24 µmol CO2 m-2 s-1, below July.
- Taxon
- Vitis vinifera L.Vitis viniferae2
- Material
- Faithe1
- Outcome
- assimilation (A) ratee0
- Direction
- lowerinferrede0
- Value
- 13.24 µmol CO2 m-2 s-1e0
- Qualifier
- Auguste0
- Comparator
- Julye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2018, assimilation (A) rate was significantly higher in July (25.17 µmol CO2 m-2 s-1) than June and August (14.01 and 13.24 µmol CO2 m-2 s-1, respectively).”
e1“on the cultivar Faith.”
e2“Grapevines (Vitis vinifera L.)”
Claim · model-written summary
High-tunnel temperatures were 1-3 ⁰C warmer than open-field conditions.
Not reportedTaxon
Verbatim
e0“The microclimate temperatures inside the HT were 1-3 ⁰C warmer compared to open-field conditions.”
Claim · model-written summary
Daily light integral varied seasonally and was generally lower inside the high tunnel.
Not reportedTaxon
Verbatim
e0“Daily light integral (DLI) varied throughout the growing season, but generally was lower inside the high tunnel.”
Claim · model-written summary
The authors conclude that high-tunnel table grape production is feasible and increases yields, but may require more labor because of excessive vigor and productivity.
- Taxon
- Vitis vinifera L.Vitis viniferae1
- Outcome
- table grape production under HT systems is feasiblee0
- Qualifier
- may require increased labor inputs due to excessive vigor and increased productivity of vinese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results from this data has shown that table grape production under HT systems is feasible and results in increased yields but may require increased labor inputs due to excessive vigor and increased productivity of vines.”
e1“Grapevines (Vitis vinifera L.)”
The same questions in other papers
cluster · yield · Vitis vinifera (wine grape)Results differ
6 papers in the same direction as this paper · 8 in the opposite direction
- positive
- positive
- positive
11 papers more in this group
See all 15 papers →pruning · yield · Vitis vinifera (wine grape)Positive and negative results
53 papers in the same direction as this paper · 41 in the opposite direction
- positive
- positive
- 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.