. Feeds and feeding abridged : the essentials of the feeding, care, and management of farm animals, including poultry : adapted and condensed from Feeds and feeding (16th ed.). Feeds; Animal nutrition. MEASURING THE USEFULNESS OF FEEDS 35 Subtracting the amounts of dry matter and of the different nutrients in the feces from the amounts in the feed, we find the amounts digested. From this we compute the percentage of each which is digested. For example, there was lbs. of dry matter in the 20 lbs. of hay the cow ate each day. Of this, lbs. was excreted in the feces, leaving lbs., o
. Feeds and feeding abridged : the essentials of the feeding, care, and management of farm animals, including poultry : adapted and condensed from Feeds and feeding (16th ed.). Feeds; Animal nutrition. MEASURING THE USEFULNESS OF FEEDS 35 Subtracting the amounts of dry matter and of the different nutrients in the feces from the amounts in the feed, we find the amounts digested. From this we compute the percentage of each which is digested. For example, there was lbs. of dry matter in the 20 lbs. of hay the cow ate each day. Of this, lbs. was excreted in the feces, leaving lbs., or per ct., as the part digested. Some feeds cannot be fed alone, as was done in this trial. For instance, horses and ruminants are not fed concentrates alone without hay or other roughage. Again, while pigs may be fed on grain only,. Fig. 12.—A Steer in a Digestion Stall In digestion trials the feces may be collected in several ways. A common man- ner is by means of the harness and rubber duct here shown. When it is merely desired to determine the digestibility of a feed, the urine need not be collected. In other nutrition studies the urine must be collected, as is being done in this trial. (From Armsby, Penn. Sta.) such feeds as tankage and linseed meal are too rich in protein to be so fed. The digestibility of such feeds must, therefore, be found by difference, instead of directly. To illustrate, a horse is first fed hay for several days and the digestibility of the hay determined. Oats may then be added to the ration, and the total amounts of nutrients digested from both feeds are found, just as in the preceding method. The amount of digestible nutrients coming from the hay is then sub- tracted from the total, leaving the amount assumed to be digested from the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfeeds, bookyear1917
