| abstract |
The present invention provides a parameter that is a measure of an increasing tendency of sugar concentration in a felled palm trunk due to storage of the felled palm trunk, and provides an efficient method for collecting sap containing sugar. A chemical that reacts with starch to color is brought into contact with, for example, a cut surface of the palm trunk or an inner piece of the palm trunk, the colored or colored palm trunk is stored, and the sap is collected from the palm trunk after storage. . The collected sap is fermented with microorganisms or reacted with enzymes. Before harvesting the palm trunk, it is preferable to pluck the fruit bunches that become the palm trunk. It is possible to identify the amount of starch present in the portion of the palm stem up to 1/3 of the fruit bunches / petiole side. [Selection figure] None |