INSPECTION OF COMMERCIAL FEEDSTUFFS 



59 



Calcium and Phosphorus Content of Commerical 

 Starting and Growing Mashes. 



Experimental data which have accumulated during the past decade indicate 

 that an excess as well as a deficiency of calcium and phosphorus should be 

 avoided in the feeding of growing chicks. The Poultry Department of the 

 State College, who give as a reference the Cornell Poultry Nutrition School, 

 furnish the following figures as to the amount and proper proportions of calcium 

 and phosphorus for chick starting and growing mashes: 

 Calcium 0.67% 



Phosphorus 0.35-0.50% 



Ratio 1.3-1.9 parts calcium to 1 part phosphorus. It is probably true that 

 the amounts of these elements needed in a mash will defend somewhat upon 

 the supplementary feed used. Where chicks are fed the so-called complete 

 mash rations it should be possible to fix the amount of calcium and phosphorus 

 consumed within narrow limits. 



During the season of 1935-1936 calcium and phosphorus contents were 

 determined on most of the chick and growing mashes officially collected. The 

 following table of results is published without comment for the benefit of 

 poultrymen who may be interested. 



Calcium and Phosphorus Content of Starting and Growing Mashes 



