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Feeding Value of Dried Poultry Waste in the Grower Diets of Mallard Egg-type Ducks (Anas platyrhynchos)
Thesis Abstract:
One hundred and twenty mallard ducklings were used in an experiment of two phases to measure the effect of dried poultry waste (DPW) incorporation in their diets as a replacement for rice bran. DPW was incorporated at 0, 5, 10, and 15 percent levels in the brooding period (Phase I). In the growing period (Phase II), the levels used were 0, 7, 13, and 20 percent.
After eight weeks in Phase I, no significant differences were obtained in all parameters used to compare all treatment data. However, growth rate and final body weights of the duck lings were slightly higher from treatments with DPW at levels of 5, 10, and 15 percent than the rice bran treatment. Feed consumption increased as the level of DPW increased. Feed conversion efficiency was lower in all the DPW levels than the rice bran diet, except at five percent DPW. Mortality was not affected by DPW. In Phase II, there was a simi lar pattern of results in growth rate, feed conversion efficiency, and mortality records as was observed in Phase I. DPW at 7, 13, and 20 percent of the diet was as good as, but in some cases slightly better than, the counterpart combination of rice bran.
The economic evaluation indicated that DPW incorporation in the diet was not economical when DPW has the same price as rice bran.
The amount of feed left in the pan of drinking water was about 7 g of dry mash matter in a period of 24 hours for each duck at about 15 weeks of age. Chemical analysis of dry matter mash feed recovered from the drinking pan that came from treatments with DPW had consistently higher contents of crude protein, calcium, and phosphorus than the rice bran diet.