Fine bamboo powder and preparation method therefor and use thereof

A bamboo fine powder prepared by a method comprising the following steps:

• (1) blanching and color protecting raw materials;
• (2) drying the raw materials obtained in step (1);
• and
• (3) superfine grinding the raw materials obtained in step (2) to obtain the bamboo fine powder with an average particle size of 1000-10,000 meshes;
• wherein the raw materials are leaves of Gramineae (Graminae) and Bambusoideae plant;
• wherein the blanching and color protecting step comprises:
• putting bamboo leaves as raw materials into a color-protecting solution with a temperature of 85 to 95° C., taking out after soaking for 30 to 90 seconds, and draining;
• and
• wherein the color-protecting solution used in the blanching and color protecting is a zinc sulfate aqueous solution or a zinc gluconate aqueous solution or a combination thereof with a concentration of 0.5 to 2.0 g/100 mL;
• the bamboo fine powder is prepared by using leaves of Gramineae (Graminae) and Bambusoideae plant as a raw material, and has a stable emerald color, and has an average powder particle size of 1000 to 10,000 meshes, and has a total amount of dietary fiber of 76.1-80.2%, a content of lignin of >20% and a content of minerals of >7%, and has at least three or more bamboo leaf characteristic components, and the bamboo leaf characteristic components are orientin, isoorientin, vitexin, isovitexin, adenosine, 8-hydroxylysine and p-coumaric acid;
• and
• the color value of the bamboo fine powder is between 46 and 60 in L* and between −16 and −8 in Δa*.