The Effects of a Mixture of Fermented Duckweed, Water Hyacinth, and Rice Bran on the Growth, Caracass Values, and Bacterial Structure in the Feces of Muscovy Ducks.

The objective of this study was to determine the optimal level of fermented mixture supplementation in the diet of Muscovy ducks to achieve improved growth performance and better health. The experiment was conducted using a completely randomized design with four dietary treatments and five replicates per treatment. The dietary treatments consisted of a basal diet without fermented mixture (F0) and diets in which 10% (F10), 20% (F20), or 30% (F30) of the dietary dry matter was replaced with the fermented mixture. A total of 200 Muscovy ducks, 35 days of age and with an average body weight of 820 ± 30 g, were randomly allocated to the treatments, with 10 ducks per experimental unit and an equal number of males and females. The feeding trial was conducted from 35 to 84 days of age. During this period, the ducks were housed in pens and fed a standard diet containing 16% crude protein and 2,890 kcal/kg metabolizable energy (Table 1). Feed and water were provided ad libitum. The dietary treatments were as follows: F0, basal diet + 0% fermented mixture; F10, basal diet + 10% fermented mixture; F20, basal diet + 20% fermented mixture; and F30, basal diet + 30% fermented mixture.
The results indicated that replacing 20–30% of the dietary dry matter with a fermented mixture consisting of 30% duckweed, 50% water hyacinth, and 20% rice bran improved the growth performance of Muscovy ducks. Furthermore, supplementation with 20–30% fermented mixture increased the population of beneficial microorganisms while reducing harmful microorganisms in duck feces.

Fermented feed mixture; duckweed; water hyacinth; Muscovy ducks; growth; fecal bacteria

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