Three experiments were conducted to evaluate the effects of mold prevention of Eucommia ulmoides Extract and it's effect on the growth performance of broilers.The first experiment compared the mold-preventing effect of Eucommia ulmoides Extract and propionic, multiple organic acid preservatives in maize-soybean diet. Within two months of storage time, the appearance, odor, moisture, CP, EE, temperature and mold sum of feedstuff were observed or measured in order to compare the mold-preventing effect among t...