Understanding feed values

[Sd1030]

I know this will prolly sound crazy and dumb but how does actual percentage values of protien, tdn, fat etc translate into lbs of feed? So if your feeding a 16% protein feed in 50/lb bags how much would a cow need to gey enough protein for the day? This is just an example, im just curious as to how the percentage effects actual lb/per day needs if that makes sense.

 

[Caustic Burno]

I know this will prolly sound crazy and dumb but how does actual percentage values of protien, tdn, fat etc translate into lbs of feed? So if your feeding a 16% protein feed in 50/lb bags how much would a cow need to gey enough protein for the day? This is just an example, im just curious as to how the percentage effects actual lb/per day needs if that makes sense.

Protein % etc. is based on lbs per 100.
You can satisfy a cows nutritional needs on three pounds of 12% feed a day, now you need another 27 pounds to fill her up.

 

[cjmc]

I know this will prolly sound crazy and dumb but how does actual percentage values of protien, tdn, fat etc translate into lbs of feed? So if your feeding a 16% protein feed in 50/lb bags how much would a cow need to gey enough protein for the day? This is just an example, im just curious as to how the percentage effects actual lb/per day needs if that makes sense.

Protein % etc. is based on lbs per 100.
You can satisfy a cows nutritional needs on three pounds of 12% feed a day, now you need another 27 pounds to fill her up.

3 times 0.12= 0.36 lbs of protein. Much less than protein requirements of a cow.

 

[cjmc]

Say a dry cow needs 7%Cp and eats 28 pounds
28*0.07=roughly 2lbs of protein.

18% hay.... 2lbs ÷0.18=11.11 lbs dry hay ÷ hay dry matter (0.88= 12.6 lbs as fed)

 

[Caustic Burno]

From TAMU

“Usually, dry mature cows in medium or higher body condition on typical dormant warm-season pasture or low quality hay often need only 1 pound to 2 pounds a day of a high protein feed. (On extremely low quality forage, such as tall-grass prairie in winter, 3 pounds to 4 pounds of high pro- tein feed may be needed.)”

https://aglifesciences.tamu.edu/animals ... d-feed.pdf

 

[cjmc]

From TAMU

“Usually, dry mature cows in medium or higher body condition on typical dormant warm-season pasture or low quality hay often need only 1 pound to 2 pounds a day of a high protein feed. (On extremely low quality forage, such as tall-grass prairie in winter, 3 pounds to 4 pounds of high pro- tein feed may be needed.)”

https://aglifesciences.tamu.edu/animals ... d-feed.pdf

I took your fist post far too literal, as in that's the only protein source :lol:
A 12% CP feed is not a high protein feed, it will actually reduce fiber digestion if the cow's main diet is low-quality dormant forage.

Anyway- back to the original post. Does this help?
https://beef.unl.edu/learning/feedanalysis.shtml

 

[Allenw]

I know this will prolly sound crazy and dumb but how does actual percentage values of protien, tdn, fat etc translate into lbs of feed? So if your feeding a 16% protein feed in 50/lb bags how much would a cow need to gey enough protein for the day? This is just an example, im just curious as to how the percentage effects actual lb/per day needs if that makes sense.

If you want a protein supplement you need a lot higher protein feed, 16% feed is an energy supplement.