Abstract: The male inflorescences from Populus L. are the dry flowers from Populus tomentosa Carr.,Populus canadensis Moench. or other homogeneous plant. The planting area is large with a high productive of inflorescences. The inflorescences abounds in amino acid,mineral and gooey,supplementing the lack of acid and mineral in some feeds. The activity compound extracting by ethanol backflow could inhibit bacterial growths and enhance the body’s ability of antioxidant stress. It can replace some feeds,decreasing the animal morbidity and raising the economic benefit. Besides,it has a nice prevent and cure ability on animal intestines disease.

Key words: inflorescence of Populus L.; flavanoids; phenolglycosides