Farm Animal Metabolism and Nutrition

the amount of available starch. The differ- ences in proteolytic activity of solid-adher- ent microorganisms between bags and th ...

underestimation of N degradability varied from 8 to 15 points when the crude protein content of forages decreased from 18 to 8% ...

2.The insoluble but potentially degradable fraction is considered to be degraded by microorganisms according to first-order kine ...

adding the amount of small particles that would still be in the bag at the same time if no particle loss had occurred. However, ...

error in estimating this fraction introduces a bias into the estimates of fractional rate and lag time. Choice of an incubation ...

(Mertens, 1993). Thus, as feed particles have the opportunity to pass out of the rumen undegraded, the extent of degrada- tion i ...

for a wide variety of dietary feed ingre- dients. In vivomeasurements of ruminal degradation of dietary protein require that ani ...

feed intake problems related to digestive upsets, hence the need to evaluate starch escaping rumen digestion. Sauvant et al. (19 ...

of DM digested after a long period of incubation in the rumen (48 or 72 h) was taken as an index of organic matter digestibility ...

1995). This approach seems to be promis- ing for predicting the fill effect of a feed- stuff. However, this equation does not ta ...

fibrolytic activity induced by changes in feeding level. The in saccomethod has been used extensively for quantification of the ...

The main factors which govern ex- changes between the rumen contents and the bag are the bag characteristics, pore size and open ...

References Archimède, H. (1992) Etude des facteurs impliqués dans les interactions digestives entre les fourrages et les aliment ...

Kristensen, E.S., Moller, P.D. and Hvelplund, T. (1982) Estimation of the effective protein degradability in the rumen of cows u ...

Nozière, P. and Michalet-Doreau, B. (1997) Effects of amount and availability of starch on amylolytic activity of ruminal solid- ...

Chapter 12 Use of Markers J.P. Marais Biochemistry Section, KwaZulu-Natal Department of Agriculture, Pietermaritzburg, Republic ...

of analysis determines the amount of marked material administered in order to obtain acceptable results, without exceeding the m ...

polymerized phenolic compounds, lignin should theoretically be indigestible and suitable as an internal marker. However, lignin ...

sources. The DAPA to N ratio in common feedstuffs such as soybean meal could be as high as 37% of that in isolated rumen bacte- ...

devices. Controlled-release devices offer the advantage of eliminating the need for repeated daily dosing or the continuous use ...