Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 203-211 |
| Number of pages | 9 |
| Journal | Vitis - Journal of Grapevine Research |
| Volume | 54 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2015 |
Fingerprint
Cite this
}
Effects of timing of N application and water constraints on N accumulation and juice amino N concentration in 'Chardonnay' grapevines. / Holzapfel, Bruno; Watt, Jacqueline; Smith, Jason; Suklje, Katja; Rogiers, Suzy.
In: Vitis - Journal of Grapevine Research, Vol. 54, No. 4, 2015, p. 203-211.Research output: Contribution to journal › Article
TY - JOUR
T1 - Effects of timing of N application and water constraints on N accumulation and juice amino N concentration in 'Chardonnay' grapevines
AU - Holzapfel, Bruno
AU - Watt, Jacqueline
AU - Smith, Jason
AU - Suklje, Katja
AU - Rogiers, Suzy
N1 - Includes bibliographical references.
PY - 2015
Y1 - 2015
N2 - The amount and timing of nitrogen (N) application to a vineyard is critical for must yeast assimilable nitrogen (YAN) concentrations. YAN concentrations and amino acid profiles are important for the fermentation process and wine composition. Commonly, N is applied at flowering to optimize leaf functioning or after harvest to enhance vine productivity the following season. In this study N was applied at various stages of berry development to determine allocation patterns between vine perennial and annual components and to assess when berry YAN concentrations can best be optimized. Five year old potted 'Chardonnay' vines received ammonium sulfate fertilizer at six different times from full bloom to two weeks before harvest and were also exposed to either full or half irrigation during that period. Reduced water supply resulted in a higher allocation of N to the perennial structures and less to the annual components of the vine. N allocation to the annual components of the vine was greatest when it was applied at full bloom, however allocation to the perennial components was greatest when it was applied after fruit-set to veraison. The timing of N supply had a substantial influence on YAN concentrations, and was highest when N was applied about two weeks after veraison. Low water supply also resulted in higher juice YAN concentrations. The perennial N reserves in the roots were highest under low water supply and when N was applied at veraison, while the allocation to the annual parts was lower under this irrigation regime. The study indicates that timing of N application and the application of water constraints during berry development can impact on N partitioning, while the total amount accumulated by the vine is not altered.
AB - The amount and timing of nitrogen (N) application to a vineyard is critical for must yeast assimilable nitrogen (YAN) concentrations. YAN concentrations and amino acid profiles are important for the fermentation process and wine composition. Commonly, N is applied at flowering to optimize leaf functioning or after harvest to enhance vine productivity the following season. In this study N was applied at various stages of berry development to determine allocation patterns between vine perennial and annual components and to assess when berry YAN concentrations can best be optimized. Five year old potted 'Chardonnay' vines received ammonium sulfate fertilizer at six different times from full bloom to two weeks before harvest and were also exposed to either full or half irrigation during that period. Reduced water supply resulted in a higher allocation of N to the perennial structures and less to the annual components of the vine. N allocation to the annual components of the vine was greatest when it was applied at full bloom, however allocation to the perennial components was greatest when it was applied after fruit-set to veraison. The timing of N supply had a substantial influence on YAN concentrations, and was highest when N was applied about two weeks after veraison. Low water supply also resulted in higher juice YAN concentrations. The perennial N reserves in the roots were highest under low water supply and when N was applied at veraison, while the allocation to the annual parts was lower under this irrigation regime. The study indicates that timing of N application and the application of water constraints during berry development can impact on N partitioning, while the total amount accumulated by the vine is not altered.
KW - 'Chardonnay'
KW - Amino-acids
KW - Nitrogen-supply
KW - Partitioning
KW - Water-status
U2 - 10.5073/vitis.2015.54.203-211
DO - 10.5073/vitis.2015.54.203-211
M3 - Article
VL - 54
SP - 203
EP - 211
JO - Vitis: journal of grapevine research
JF - Vitis: journal of grapevine research
SN - 0042-7500
IS - 4
ER -