Factors influencing the rate of excretion of administered chromium sesquioxide by steers

The Use of Chromic Oxide in the Measurement of Individual Feed Intake in Cattle Fed on Silage and Barley

“…This difference is a measure of possible short-term errors in Cr 2 C>3 excretion which may include a diurnal variation (Kane et al, 1952) and a day-to-day variation (Corbett et al, 1960) in the Cr 2 O 3 content of faeces. This is in agreement with other workers who found a reduction in the variation in the Cr 2 O 3 content of faeces samples when Cr 2 O3 was administered in shredded paper (Corbett et al, 1960), twice daily (Hardison, Engel, Linkous, Sweeney and Graf, 1956) and before a meal (Balch et al, 1957). This is in agreement with other workers who found a reduction in the variation in the Cr 2 O 3 content of faeces samples when Cr 2 O3 was administered in shredded paper (Corbett et al, 1960), twice daily (Hardison, Engel, Linkous, Sweeney and Graf, 1956) and before a meal (Balch et al, 1957).…”

“…Coup and Lancaster, 1952;Raymond and Minson, 1955;Hutchinson, 1956;Brisson, 1960; t Present address: Grassland Research Institute, Hurley, Berks. Crampton and Lloyd, 1951;Balch, Reid and Stroud, 1957;Luitingh, 1961;Clanton, 1962;Troelsen, 1965). Crampton and Lloyd, 1951;Balch, Reid and Stroud, 1957;Luitingh, 1961;Clanton, 1962;Troelsen, 1965).…”

Voluntary intake by grazing steers and digestibility trends of tall fescue and reed canarygrass as summer and fall-saved pasture

“…Indi cators have been widely used both to predict digestibility and to estimate fecal output of the grazing animal. Some of the indicators that have been used are chromic oxide (11); iron oxide (80); certain radio-active isotopes (80); plant chromo gens (38); lignin (43); N (38); fiber, variously determined (98); methoxyl groups (80); silica (84); copper (84); and magnesium (84). More recently, jUn vitro digestibility deter minations on samples taken from esophageal fistulae have been used to estimate digestibility {5, 85.…”

“…Balch et al (11) found that gelatin capsules of chromic oxide powder dissolved in five minutes after entering the rumen. …”

“…Chromic oxide has been widely used in animal feeding trials both to determine fecal output where intake is unknown and to determine digestibility where intake and fecal output are both known (11) . In spite of some drawbacks it is con sidered the best available indicator for fecal output measure ment in grazing studies (28,30).…”