Abstract
Dietary Houttuynia Cordata/Fermented Red Koji Blends to Improve Duck Growth Performance and Alum Blends Addition to Reduce Litter Ammonia Concentration
Highlights
Medicinal herbs possess multiple unique properties and have several beneficial effects as feed additives, notably the enhancement of growth performance in animals (Fu et al, 2013)
The treatments were as follows: (1) control, no additives in pen with basal diet; (2) T1, 50 g alum + 50 g aluminum chloride/kg duck litter in pen with 1% Houttuynia cordata (HC) powder mixed with fermented red koji (FRK); (3) T2, 100 g alum + 100 g aluminum chloride/kg duck litter in pen with pelleted 1% HC/FRK; and 4) T3, 150 g alum + 150 g aluminum chloride/kg duck litter in pen with coated pellets of 1% HC/FRK
We found that the form in which the HC + FRK additive was provided to ducks had a differential effect on the improvement in growth performance in following order: coated pellets (T3) > pellets (T2) > powder blend (T1) > Control
Summary
Medicinal herbs possess multiple unique properties and have several beneficial effects as feed additives, notably the enhancement of growth performance in animals (Fu et al, 2013). The livestock industry has begun using appetite-stimulating medicinal herbs as feed additives to promote growth (Costa et al, 2013; Paraskeuas et al, 2017). A further promising feed additive for enhancing livestock growth performance is red koji (Monascus sp.). This fungus is used as a dietary supplement or herbal medication in East Asian countries due to its production of cholesterol-decreasing monacolin K (Fujimoto et al, 2012). This study, examined the influence of different preparations of HC mixed with FRK, and the addition of acidulent blends on duck growth and litter pH and NH3 concentration
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