Research: Study on replacing soy with duckweed (Allaboutfeed.com)
Linseed oil is a rich source of linolenic acid which can be incorporated into the meat and eggs increasing omega-3 content of these poultry products BUT there are limits on its use. It can replace 2 or 3% of the protein equivalent of soybean meal in the diet, but higher levels are known to reduce body weight gain and feed consumption in broilers and poults. The adverse effect of feeding linseed meal was greater than what would be predicted from the nutritional contribution to the diet and there was concern that it contained a toxic factor. At one time, it was speculated that cyanide from its cyanogenetic glucoside might be responsible for the adverse feeding value. Because of these anti-nutritional factors it is not recommended to use linseed in poultry diets.
Red worms are high in protein and make an excellent food served alive or dried. Worm populations can double every six weeks. They also eat their weight in compost material (such as garden and kitchen scraps) each day.
Red worms are not the typical earthworm most are familiar with. Red worms (also known as tiger worms, brandlings, angle worms, manure worms, or red wrigglers) occupy a different ecological niche than typical earthworms. They live near the surface where there are high concentrations of organic matter.
Research: The nutritional value of earthworms for chickens. British Poultry Science Journal 21(5): 405-410. 1980.
- Feeding trials were conducted with chickens from 1 d to 8 weeks of age to evaluate the nutritional value of earthworms. The growth rate of chickens fed on maize or a protein-free diet supplemented with earthworms and vitamins was not significantly different from that of control birds fed on a complete grower diet.
- The amino acid composition of earthworm homogenate was found to correspond fairly well with the amino acid requirements of chickens.
Raising earthworms successfully (North Carolina State University)
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