A common practice amongst winemakers is to make a standard addition of DAP to the juice or must (100-300mg/L) at
inoculation without measuring the nitrogen concentration.
This article will show that DAP addition has signifi cant flavour consequences and that measuring the initial nitrogen
concentration provides the opportunity to adjust DAP addition not only to achieve an adequate fermentation rate, but also to more reliably guide the flavour profi le and style of wine required.
This work is still in a conceptual stage based on studies with
Chardonnay and Shiraz; however, it should stimulate
winemakers to experiment with these and other varieties