L919J 



DAIRY FARMING DAIRYING. 



573 



us was Found In tin' gluten-stover trials. In t lit* alfalfa experiments the bal- 

 ances were all negaJ ive. 



The efficiency of each ration combination tor the two years Is shown in the 

 Subjoined table Cow No. 2 of each year is the same snlmal. 



Absorbed nitrogen utilized for milk production by cows fed eior(r or alfalfa 



hay with various grain supplements. 



The earlier studies showed that gluten feed was markedly Inferior for milk 

 production to linseed meal or distillers' grains as supplements to the proteins of 

 eon: stover. The above records are held to show that gluten feed as m supple- 

 ment to cinder or alfalfa hay is substantially equal t<> the other grains. The 

 lower efficiency Of cottonseed meal when fed with alfalfa hay is noted, but no 

 explanation is offered. The higher efficiency throughout of distillers' grain 

 than gluten feed is thought to be due to the fact that the former contains pro- 

 teins from the corn embryo, it Is suggested that an equally effective protein 

 mixture could be secured by adding 10 to 15 per cent of perm oil meal to gluten 



feed. 



Throughout both experiments the animals maintained their body weight, 

 but there was a slight decrease of milk flow. The percentage composition of 



the milk remained about constant. At the end of the clover experiments the 

 cows were fed for three weeks on the linseed meal ration to which casein had 

 been added, so as to make a nutritive ratio of 1 : ">. This higb protein feeding 

 Stimulated milk yield and caused an actual increase in solids secreted. "The 

 peculiar stimulating effect of liberal protein feeding on mammary activity was 

 strikingly shown in these records. The maintenance of milk flow desired by 

 every dairyman is very probably secured by his customary high protein feeding, 

 but at what expense is not so clear." 



The results of these experiments "again emphasize the limitations of any 

 classification of natural foods in respect to the efficiency nf their proteins based 

 on the determination of such nutritive worth in a single food material or a 

 single food mixture." 



Feeding trials of velvet-bean feed, palm-kernel meal, and various grain 

 mixtures for dairy cows, J. J. IIoockr and J. W. Xttter [Kentucky Sta. ('ire. 

 88 (f918). pp. S1-S8, pi. /, fta. 1).— Brief reports are given of six tests of the 

 value for milk production of grain mixtures containing either velvet-bean meal 

 or palm-kernel meal. The palm-kernel experiments were conducted before 

 Great Britain restricted the export of palm kernels from Africa and when it 

 appeared certain that large quantities would he available in this country for 

 feeding purposes. Analysis of the palm-kernel meal used showed the following 

 percentage composition: Protein 18.75, fat 2.4, fiber 16.63, nitrogen-free extract 

 48.26, ash 4.67, and water 9.39. The palm-kernel meal did not prove very 

 palatable. 



