Studies on factors to increase mold inhibitor effectiveness in livestock rations, 1; effects of particle size and the levels of protein in the ration on the usage of a mold inhibitor
1988
Nahm, K.H. | Nahm, K.S. (Taegu Univ., Taegu (Korea R.). Coll. of Agriculture)
The effect of two particle size ranges (80 % of the particles in the ration less than 1.19mm; and 40 % of the particles in the ration less than 1.19mm) and two different levels of protein (18 % and 12 %) on the activity of mold inhibitors in commercial ration was determined by measuring mold count, CO2 production and aflatoxin concentration. A commercial fungistat was mixed in the treated diets at the level of 0.1 % (W/W). Two types of experimental diets (18 % and 12 % protein) which contained 12.6 and 12.7 % moisture content each were stored under the forced air humidifier at 85 % humidity and a control led-temperature of 29 + 1deg C for 5 to 40 days. Mold count and CO2 levels in the feed treated with mold inhibitor were significantly higher (P0.05 and P0.01 respectively) when 40 % of the ration's particle size was 1.19mm. The different protein levels in the ration treated with mold inhibitor did not have a significant effect (P0.05) on the mold count and CO2 production. Protein level x particle size range interaction on the CO2 production was significant (P0.05). Aflatoxin production in the experimental diet with mold inhibitor was significantly (P0.05) affected by the levels of protein and the different particle size ranges. The interaction of protein levels and particle size ranges on the aflatoxin production was significant (P0.05) at 40 days of storage
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