776 



EXPEEIMENT STATION KECOED. 



phosphorus retention, and smaller quantities result in loss of phosphorus from 

 the organism. 



"The addition of calcium phytate increased the potassium both in the urine- 

 and dung, and changed the path of elimination of part of the magnesium from 

 the kidney to the intestine. The calcium added as calcium phytate was almost 

 entirely eliminated by the intestine immediately after administration. The 

 calcium of the urine increasetl with decreasing phosphorus in the rations and 

 decreased when calcium phytate was added. 



" The nitrogen compounds of the ration were well utilized and for the most 

 part a positive nitrogen balance was maintained. The animal gained 19 kg. 

 during the experiment, half of which could be accounted for by the plus balance 

 of nitrogen. There was a suggestion of a parallelism between the nitrogen and 

 phosphorus balances. 



" The former observations as to the influence of phosphorus compounds on the 

 oestrum and the amount of urine voided were not corroborated ; neither was the 

 laxative effect previously noted. The difference in the moisture content of the 

 feces of the several periods of this experiment was very small. 



"A long low-phosphorus period resulted in unfavorable symptoms. The animal 

 returned to a normal condition after a week's feeding on ash-rich rations includ- 

 ing alfalfa, silage and wheat bran. 



" The volume of the milk fluctuated inversely with the amount of phytin 

 phosphorus in the rations. The increase of milk flow on removal of phytin 

 was not a mere dilution. Except for the change in the amount of fat, the 

 composition of the milk was not materially altered. The responses of the fat 

 to the fluctuations of phytin phosphorus were immediate and consistent, as 

 distinct, though not quite as large, as in the previous experiments. The best 

 milk flow, both as to amount and fat content, happened to occur in the period of 

 phosphorus equilibrium." 



[Report of] the professor of ajiimal husbandry, G. E. Day {Ann. Rpt. 

 Ontario Agr. Col. and E.vpt. Farm, 37 (1911), pp. lJi1-lJi9).—The records of the 

 dairy herd are given and several feeding tests are reported. 



When dried brewers' grains were substituted for bran the milk production was 

 increased in 9 out of 11 cows. Cotton-seed meal appeared to be equal to twice 

 its weight of bran. Soy-bean meal gave results almost identical with those from 

 cotton-seed meal. The normal milk yield was retained when a good quality of 

 alfalfa hay replaced the grain ration. 



The dairy herd, F. C. Minkler (New Jersey Stas. Rpt. 1910, pp. 58-67, 

 pis. 7). — This gives the individual milk records, and an account of the methods 

 of feeding the college herd. Thirty-one cows gave an average annual yield of 

 8,661 lbs. of milk with a fat content of 3.96 per cent. The following table gives 

 some of the results obtained with the cows of different breeds kept iu the 

 college herd : 



Comparison of the fiiilk yields and ineome from dairy eoivs. 



Breed. 



Holstein. 



Jersey 



Guernsey 

 Ayrshire. 



Num- 

 ber of 

 cows. 



yield of 

 milk. 



Lhs. 

 9,724.2 

 7,978.0 

 5,822.0 

 8,630.3 



Average 

 fattest. 



Per cent. 

 3. 43 



5.17 

 4.85 

 3.72 



Average 



yield of 



milk 



fat. 



Lhs. 

 333. 91 

 411.84 

 282. 42 

 34.43 



Average 

 yield of 

 milk per 

 day (Tor 

 entire 

 year). 



Lbs. 

 26.6 

 21.9 

 15.9 

 23.6 



Average 

 number 

 of days 

 in milk. 



284 

 293 

 212 

 270 



Value of 



milk at 6 



cts. per 



quart. 



$271.88 

 223. 06 

 162.78 

 241.30 



