Descriptive analysis of two consecutive vintages of Oregon Pinot noir wines as effected by irrigation, tillage and nitrogen supplementation in the vineyard Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/v979v619q

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  • Two vintages of Vitis vinifera cv. Pinot noir wine from a viticulture trial evaluating nitrogen fertilization, tilling and irrigation underwent descriptive analysis using a modified version of free-choice profiling. Wines were made from three field blocks of the twelve factorial combinations of Irrigation (Dry or Irrigated), Tillage (Tilled or not Tilled) and Fertilization (None, Foliar nitrogen supplementation or soil applied nitrogen). Irrigation was associated with lower anthocyanins and total phenols as well as lower color intensity and purple hue in both vintages. Irrigation increased vegetative and spicy character in the 1999 vintage while non-irrigated treatments were characterized by fruit, cherry and berry characteristics. Tilling significantly increased fruity flavor and body in the 1999 vintage and was associated with increased vegetative character in the 2000 vintage. In the 2000 vintage, non-fertilized treatments were significantly higher in floral aroma than the soil or foliar fertilized treatments.
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