| Popis: |
MUSSEHL and Ackerson (1935) found that the growing turkey is able to adjust itself to a wide range in phosphorus intake. Normal growth and bone ash were obtained at levels of phosphorus intake from 0.63 to 1.47 percent. Titus (1939) and Marsden and Martin (1939) conclude that turkey starting diets should contain not less than 0.7 percent phosphorus. The former writer suggests 1 percent as preferable, the latter writers suggest 0.85 percent. Hammond (1942) found that 80 A.O.A.C. chick units of vitamin D per 100 grams of feed permitted satisfactory growth and calcification in the growing turkey. Hammond, Miller, and McClure (1942) found that chicks fed a low-phosphorus diet which had been heated to destroy certain members of the vitamin B-G complex required 5 times their usual vitamin D requirement for normal calcification. Thus, it seemed possible that growing turkeys might tolerate low levels of phosphorus, if the usual vitamin . . . |
