Abstract
Berry harvesting coinciding with the monsoon is the major problem of grapevine (Vitis vinifera L.) cultivation in Nepal. Nepalese viticulture is benefitted by advancing budburst and hydrogen cyanamide (HC) has the potential to break the bud dormancy in grapevine leading to early harvesting. To prepone the budburst and thus the harvesting, field experiment was conducted in a commercial vineyard, Dhading, aiming to identify the appropriate dose of HC for the advancement of natural budburst in cv. Cabernet Sauvignon. Six HC application treatments; (i) Control, ii) 2% HC, iii) 3.5% HC, iv) 5% HC, v) 6.5% HC, and vi) 8% HC) were replicated four times considering vine as replication in randomized complete block design. Grapevine growth were recorded using a modified Eichhorn and Lorenz (E-L) growth stage notation, and other quantitative and qualitative attributes were measured at flowering and harvesting. HC preponed the budburst (about 3 weeks) compared to control. Number of days to 50% budburst was earlier (31 days) in 3.5% HC treated vines than in control. Budburst and flowering were maximum (70±2.72% and 63.33±4.08%, respectively) in 2% HC treated vines and the lowest (20.83±14.17% and 19.17±13.63%, respectively) was in 8% HC treated vines in 84 days after HC application. TSS was varied but the average bunch weight did not differ with HC treatments in the same day of harvest. Higher HC concentration (≥6.5%) adversely affected the budburst and thus in flowering and yield. The HC was effective to prepone the natural budburst calendar, shoot growth and flowering, enabling harvesting before monsoon. The HC 2% application in winter buds was found appropriate for the cv. Cabernet Sauvignon to prepone budburst and harvesting before monsoon. The HC dose and application timing might be differ in cultivars and growing condition, thus, cultivar and location specific researches are recommended
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Claims 11
Claim · model-written summary
Hydrogen cyanamide advanced budburst by about three weeks relative to control.
VitisOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“HC preponed the budburst (about 3 weeks) compared to control.”
t0“Grapevine”
Claim · model-written summary
At 3.5% HC, 50% budburst occurred earlier than in control, at 31 days.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Number of days to 50% budburst was earlier (31 days) in 3.5% HC treated vines than in control.”
t0“Grapevine”
Claim · model-written summary
Budburst was highest at 2% HC, at 70±2.72%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Budburst and flowering were maximum (70±2.72% and 63.33±4.08%, respectively) in 2% HC treated vines”
t0“Grapevine”
Claim · model-written summary
Flowering was highest at 2% HC, at 63.33±4.08%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Budburst and flowering were maximum (70±2.72% and 63.33±4.08%, respectively) in 2% HC treated vines”
t0“Grapevine”
Claim · model-written summary
Budburst was lowest at 8% HC, at 20.83±14.17%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Budburst and flowering were maximum (70±2.72% and 63.33±4.08%, respectively) in 2% HC treated vines and the lowest (20.83±14.17% and 19.17±13.63%, respectively) was in 8% HC treated vines”
t0“Grapevine”
Claim · model-written summary
Flowering was lowest at 8% HC, at 19.17±13.63%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Budburst and flowering were maximum (70±2.72% and 63.33±4.08%, respectively) in 2% HC treated vines and the lowest (20.83±14.17% and 19.17±13.63%, respectively) was in 8% HC treated vines”
t0“Grapevine”
Claim · model-written summary
TSS varied among HC treatments.
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“TSS was varied but the average bunch weight did not differ with HC treatments in the same day of harvest.”
t0“Grapevine”
Claim · model-written summary
Average bunch weight did not differ among HC treatments on the same harvest day.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the average bunch weight did not differ with HC treatments in the same day of harvest.”
t0“Grapevine”
Claim · model-written summary
HC concentrations of at least 6.5% adversely affected budburst and flowering.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher HC concentration (≥6.5%) adversely affected the budburst and thus in flowering and yield.”
t0“Grapevine”
Claim · model-written summary
HC concentrations of at least 6.5% adversely affected yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher HC concentration (≥6.5%) adversely affected the budburst and thus in flowering and yield.”
t0“Grapevine”
Claim · model-written summary
The authors recommended 2% HC on winter buds to advance budburst and harvest before monsoon.
Not reportedTreatmentComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The HC 2% application in winter buds was found appropriate for the cv. Cabernet Sauvignon to prepone budburst and harvesting before monsoon.”
t0“Grapevine”
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