@article {Tian156, author = {Tian Tian and Meghan Ruppel and James Osborne and Elizabeth Tomasino and R. Paul Schreiner}, title = {Fertilize or Supplement: The Impact of Nitrogen on Vine Productivity and Wine Sensory Properties in Chardonnay}, volume = {73}, number = {3}, pages = {156--169}, year = {2022}, doi = {10.5344/ajev.2022.21044}, publisher = {American Journal of Enology and Viticulture}, abstract = {The impact of nitrogen (N) fertilization in the vineyard on vine productivity, fermentation, and wine sensory properties was compared to that of winery N addition on enological characters in Chardonnay between 2016 and 2018. Five treatments, including no vineyard or winery N addition (No N), addition of diammonium phosphate in the winery (+DAP), addition of organic N in the winery (+Org N), and addition of N to the vineyard soil (Soil N), or to foliage (Foliar N) were evaluated. The Foliar N treatment was evaluated in 2017 and 2018 only, while the other treatments were assessed in all years. Soil N increased leaf and petiole N status in all years and increased canopy growth and yield in years two and three. Foliar N had only a minor influence on leaf or petiole N status and did not alter vine growth or yield. Both Soil N and Foliar N elevated juice yeast assimilable nitrogen (YAN), although the extent of increase was greater for Soil N. Addition of DAP in the winery boosted juice YAN similar to the Soil N treatment, and addition of organic N was similar to the Foliar N musts. Fermentations proceeded more quickly in Soil N musts than in No N musts, with the Foliar N, +DAP, and +Org N treatments intermediate between Soil N and No N treatments. Wine sensory analysis revealed that Soil N wines were most distinct, with greater tropical fruit aromas. These findings show that while winery N additions provide similar fermentation kinetics to vineyard N fertilization in Chardonnay, they may not produce a wine with similar sensory characteristics.}, issn = {0002-9254}, URL = {https://www.ajevonline.org/content/73/3/156}, eprint = {https://www.ajevonline.org/content/73/3/156.full.pdf}, journal = {American Journal of Enology and Viticulture} }