Zinc Content of Certain Feeds, Associated Materials, and Water

Abstract

One of the handicaps in planning nutrition studies is lack of reliable data on the zinc content of most feeds. The zinc content of several materials was determined by the dithizone procedure. Some of these and the average zinc in ppm were: whole fresh milk, 3.9; dried beet pulp, 8.9; dried citrus pulp, 8.9; Coastal bermudagrass hay, grown in the Piedmont, 32; Coastal bermudagrass hay, grown in the Coastal Plain, 16; urea feed mixture, 6.2; dicalcium phosphate, food grade, 1.8; dried whole whey, spray process and all stainless steel equipment, 2.9; dried whole whey, roller process and assorted equipment, 27; and dried egg albumen, 2.5. There are 25 other listings. All include the number of samples and range. The various values are discussed in relation to data in the literature.