Which type of barley has a higher diastatic power?

The correct choice indicates that six-row barley has a higher diastatic power compared to two-row barley. Diastatic power refers to the enzyme activity in malted grains that converts starches into fermentable sugars during brewing. This is primarily measured by the presence of enzymes like alpha-amylase and beta-amylase.

Six-row barley contains a higher concentration of these enzymes because it typically has more endosperm and a higher protein content. As a result, the additional enzymes produced in six-row barley contribute to its elevated diastatic power, making it advantageous for brewers who require a high level of fermentable sugars, especially in producing certain styles of beer or when brewing with adjuncts that require more starch conversion.

In contrast, two-row barley typically has a denser kernel with fewer enzymes available for starch conversion, which can result in lower diastatic power. Understanding the characteristics and uses of both types of barley allows brewers to select the appropriate grain for their specific brewing needs.