Characteristics of Feed Supplement Containing Lingzhi (Ganoderma lucidum), Organic Chromium and Roasted Soybean at High Temperature and Humidity Storage

Abstract

ABSTRACT Stability of feed supplement quality is depending on its content and storage condition. High quality of supplement is going to give high performance of animal production. The objective of this research was to determine the characteristics of feed supplement containing Lingzhi (Ganoderma lucidum), organic chromium and roasted soybean that stored at high temperature (+ 28oC) and high humidity (+ 86%) by evaluation the moisture content, the physical characteristics and the aflatoxin contamination. The experiment was designed using eight of feed supplements as treatments, five periods of storage and 3 replications. Eight kinds of treatments were S0: commercial supplement as control, S1: 3 ppm organic-Cr + 0.01% G. lucidum, S2: roasted soybean (1% of dietary fat) + 3 ppm organic-Cr, S3: roasted soybean (1% of dietary fat) + 0.01% G. lucidum, and S4: roasted soybean (1% of dietary fat) + 3 ppm organic-Cr + 0.01% G. lucidum, S5: 5% roasted soybean + 3 ppm organic-Cr, S6: 5% roasted soybean + 0.01% G. lucidum, and S7: 5% roasted soybeans + 3 ppm organic-Cr + 0.01% G. lucidum. Five long of storage were 0, 2, 4, 6 and 8 weeks. The supplements were put in the polyethylene plastic bag and every two weeks were analyzed the moisture content, the physical characteristics like color, texture and odor, also aflatoxin contamination. All parameters were analyzed using descriptive analysis, except the moisture data were analyzed using ANOVA (Analysis of Variance) and orthogonal contrast test. The results showed that the various of feed supplements, long of storage, and their interaction significantly increased on the moisture content of supplement (p<0.05). All results showed percentage of moisture content less than 11% even on the longest of storage period. Compared to control, the moisture content increased 0.61% in high level of roasted soybean in the supplement (S5, S6 and S7) and 1.64% in low level of roasted soybean in the supplement (S2, S3 and S4). The odor became worse after 4 weeks storage, but no color and texture changing as well as no an aflatoxin contamination detected until 8 weeks storage. As conclusion, feed supplements containing Lingzhi (Ganoderma lucidum), organic chromium and roasted soybeans can be stored in high temperature and high humidity conditions using polyethylene plastic bags as packaging for no more than 4 weeks to maintain a good quality.