Effects of Frequency of Feedingo on Excretion of Chromic Oxide, Crude Protein and Gross Energy and on Nutrient Digestibility by Steers

Rl, McGuire; Nw, Bradley; Co, Little

doi:10.2527/jas1966.251185x

Cited by 19 publications

(7 citation statements)

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“…Deinum et al (11) concluded that the small nonexcreted part of the chromic oxide was absorbed. McGuire et al (27) could offer no explanation for the low chromic oxide recovery value, 94.2 percent, obtained when feeding a 0.5-percent chromic oxide complete ration to growing steers. MacKenzie et al (25) administered a dose of radioactive enrómate to rats similar to the amount that they would receive per day while drinking water containing 2 p.p.m.…”

Section: Depletion and Repletion Of Cr In The Fecesmentioning

confidence: 97%

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The Use of Chromium and Acid-Detergent Lignin in Complete Rations as Indicators of the Fecal Excretion Rate in the Ruminant Animal

Arroyo-Aguilú¹,

Evans²

1970

JAUPR

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Chromium (Cr) and acid-detergent lignin (L) were evaluated as index substances for determining digestibility of complete, low-fiber rations with growing steers. The rate of recovery of ration Cr was studied during depletion and repletion of the indicator. Total fecal collections were carried out for 7 days after a 1-day period of Cr intake. Recovered Cr for the 7-day period amounted to 85.5 ± 7.2 percent with a value of 82.3 ± 6.8 percent for the first 5 days, with a maximum amount of 30 percent on the second day. During the 21-day depletion following a 21-day repletion, fecal Cr decreased rapidly for the first 7 days and continued to decrease to 0.54 ± 0.02 percent at the end of the depletion. During 7-day and 10-week periods, L was recovered to the extent of 96.7 ± 0.5 and 96.6 ± 2.3 percent, respectively. Recovered Cr amounted to 94.4 ± 0.5 percent in long-term trials and to 90.5 ± 2.5 percent in short-term trials. In long-term trials, L was recovered to the extent of 94.1 ± 1.0 percent. No statistical differences (P < 0.05) were found among grab-sampling times or between grab samples and the total collection samples in rates of excretion of nutrients per unit of indicator. It was suggested that the differences in grab-sampling times were minimal when either Cr or L indicator techniques were used to determine digestibility. Recovery data tend to show that L is a valid marker and has the desirable characteristic of being a constituent of ruminant feedstuffs.

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Section: Depletion and Repletion Of Cr In The Fecesmentioning

confidence: 97%

“…These index substances, intended to be nontoxic and indigestible to the animal, are being used as indicators of digestibility by means of ratio techniques. Chromic oxide (28,27)* and lignin (18,21) are two of the most used markers in digestibility studies.…”

Section: Introductionmentioning

confidence: 99%

The Use of Chromium and Acid-Detergent Lignin in Complete Rations as Indicators of the Fecal Excretion Rate in the Ruminant Animal

Arroyo-Aguilú¹,

Evans²

1970

JAUPR

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“…More specifically, more digestible feeds are better options for heifer raisers because they allow the heifers to obtain more nutrients from the same amount of feed, potentially allowing the animal to grow more quickly and enter lactation at an earlier age. Diet digestibility can be determined using chromic oxide techniques in short-term digestion trials (McGuire, Bradley, & Little, 1966;Hardison, Linkous, Engel, & Graf, 1959). Chromic oxide is not readily absorbed by the animal, so the concentration of chromic oxide in the feed will be proportional to the concentration in the feces.…”

Section: Introductionmentioning

confidence: 99%

Bovine Nutritional Needs: Digestibility of Dry and Ensiled Forages when Feeding Young Dairy Heifers

Nigaglioni¹

2012

JPUR

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is a junior in the School of Agriculture majoring in animal sciences (concentration: preveterinary medicine). Nigaglioni's research began as a requirement for her Food, Environmental, Engineering, and Life Sciences (FEELS) grant in fall 2010. Her research on digestibility when feeding dry or ensiled forages to young dairy heifers involves working in the field and in the lab analyzing data. Nigaglioni is active in the Puerto Rican Student Association board, is a member of the National Society of Leadership and Success, and is a participant in the Leadership Certificate Program. After graduation, Nigaglioni plans to attend veterinary school, focusing on small, avian, and exotic animals.

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“…Since fluctuations have been reported in fecal Cr,O, concentra--tions with time during a2#hour period when Cr,O" was added to sheep (12) and steer (8) (8,12) who noted that the time during the day for optimum, maximum and minimum recovery of Cr,O" varied extensively.…”

Section: Introductionmentioning

confidence: 99%

Chromic Oxide in Digestibility Studies With Lactating Dairy Cows

Hoogendoorn¹,

Grieve²

1969

Can. J. Anim. Sci.

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Effects of Frequency of Feedingo on Excretion of Chromic Oxide, Crude Protein and Gross Energy and on Nutrient Digestibility by Steers

Cited by 19 publications

References 0 publications

The Use of Chromium and Acid-Detergent Lignin in Complete Rations as Indicators of the Fecal Excretion Rate in the Ruminant Animal

The Use of Chromium and Acid-Detergent Lignin in Complete Rations as Indicators of the Fecal Excretion Rate in the Ruminant Animal

Bovine Nutritional Needs: Digestibility of Dry and Ensiled Forages when Feeding Young Dairy Heifers

Chromic Oxide in Digestibility Studies With Lactating Dairy Cows

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