POULTRY FEEDS AND FEEDING 



anced ration requires supplementing seeds, tubers, roots 

 and meat with milk and leafy vegetables. 



FEEDING STANDARDS FOR FOWLS 



Very little satisfactory work has been done in prepar- 

 ing feeding standards for fowls. Some digestive experi- 

 ments have been conducted but the results have not been 

 particularly satisfactory and the number of feeds included 

 in this work is comparatively small. One reason why 

 digestive tests with fowls is difficult is because the urine 

 and dung is voided together and not separately as with 

 animals, making it much more difficult to study the differ- 

 ent elements digested in feeds. For these reasons the 

 digestible nutrients of feeds which apply to animals are 

 practically the only complete tables available for use with 

 poultry, but the digestive experiments conducted with 

 poultry so far, would indicate that the animal digestion 

 tests do give somewhat similar results to tests with 

 fowls. While the digestive tests which have been made 

 with fowls are very limited in number and the use of 

 nutritive values and ratios is of an indefinite nature, they 

 still furnish our best available data and the nutritive ratios 

 worked out in this book are based on digestible com- 

 position as worked out for animal feeding. Table (II) in 

 the rear of this book gives the total composition of feeds 

 and also the digestible composition of feeds for animals. 



NUTRITIVE RATIOS 



The proportion of the protein to the nitrogen free ex- 

 tract plus the fat reduced to terms of nitrogen free ex- 



44 



