Abstract
The growth and nitrogen (N) percentage of the annual components and the N percentage of the perennial components of unfertilised and fertilised (100 kg N/ha.season) irrigated grapevines (Vitis vinifera cv. Sultana syn. Thompson Seedless) were compared over 2 consecutive seasons. Leaf, stem and fruit samples were measured for dry matter yield and N content at about fortnightly intervals during the growing season, and samples of 1–2-year-old wood, trunk, cane and root were sampled for N content at about fortnightly intervals during the growing season and 4-week intervals during dormancy. Total vine biomass was assessed on unfertilised vines following fruit harvest in the second season. Total vine biomass at this time was about 13.1 kg dry matter/vine, 43% of which was below the soil surface. Dry matter and fruit yield of vines did not respond to N application until the second season with an increase in annual biomass and fruit yield of 75 and 140%, respectively. The N contents of all vine organs were related to vine phenology, with N percentage decreasing in all annual parts during the season. The N percentage in perennial parts was lowest near flowering and fluctuated from then until harvest depending on demand by annual parts, principally leaves and fruit, and supply.
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Claims 6
Claim · model-written summary
Unfertilised vines had about 13.1 kg dry matter/vine after fruit harvest.
VitisOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total vine biomass at this time was about 13.1 kg dry matter/vine”
t0“Sultana grapevines”
Claim · model-written summary
Belowground biomass represented 43% of total vine biomass.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“43% of which was below the soil surface”
e1“Total vine biomass was assessed on unfertilised vines”
t0“Sultana grapevines”
Claim · model-written summary
Nitrogen application increased annual vine biomass by 75% in the second season.
- Treatment
- fertilised (100 kg N/ha.season)e1
- Outcome
- annual biomasse0
- Direction
- increasee0
- Value
- 75e0
- Qualifier
- second seasone0
- Comparator
- unfertilisede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dry matter and fruit yield of vines did not respond to N application until the second season with an increase in annual biomass and fruit yield of 75 and 140%, respectively”
e1“unfertilised and fertilised (100 kg N/ha.season) irrigated grapevines”
Claim · model-written summary
Nitrogen application increased fruit yield by 140% in the second season.
- Treatment
- fertilised (100 kg N/ha.season)e1
- Outcome
- fruit yielde0
- Direction
- increasee0
- Value
- 140%e0
- Qualifier
- second seasone0
- Comparator
- unfertilisede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dry matter and fruit yield of vines did not respond to N application until the second season with an increase in annual biomass and fruit yield of 75 and 140%, respectively”
e1“unfertilised and fertilised (100 kg N/ha.season) irrigated grapevines”
Claim · model-written summary
Nitrogen percentages decreased in all annual vine parts during the season.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N percentage decreasing in all annual parts during the season”
t0“Sultana grapevines”
Claim · model-written summary
Nitrogen percentage in perennial parts was lowest near flowering and fluctuated until harvest.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The N percentage in perennial parts was lowest near flowering and fluctuated from then until harvest”
t0“Sultana grapevines”
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