114 



Feeds cmd Feedmg. 



148. Standard rations for dairy cows. — From the reports of 128 

 American dairymen gathered by "Woll, that investigator deduces 

 what he calls the American ration for dairy cows. Based 

 on their personal study of dairy herds covering three winters 

 as just noted, Atwater and Phelps of the Storrs Station offer a 

 tentative standard. Below are grouped the several standards for 

 convenient reference by the student. 



American and German feeding standards for dairy cows. — Digestible ■ 

 nutrients per day per 1,000 pounds live weight. 



* Organic matter. 



Kiihn's^ standard ration for a thousand-pound dairy cow under 



varying conditions is as follows: 



Pounds. 



Dry matter 20-33.5 



Digestible albuminoids 1.5-2.4 



Digestible ether extract 4- .7 



Digestible nitrogen-free extract, assimilable crude fiber, and 



amides 12 - 14 



Nutritive ratio 1 : 5.5-8 



Beviewing the above, it is found that Woll's proposed American 

 dairy ration calls for less protein and more carbohydrates and 

 ether extract than "Wolff's, the nutritive ratio being 1 : 6.9 against 

 1 : 5.4. Atwater and Phelps' proposed standard coincides with 



' Die zweckmassigste Emahrung des Rindviehes, 1887, p. 257. 



