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Replies: 1   Last Post: Jun 22, 2011 6:15 AM

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 H gill Posts: 1 Registered: 12/19/10
Posted: Dec 19, 2010 1:32 PM

I am an old time farmer with only a GED and lots of mooo cows.
So could you please give this the old proverbial KISS?

Here are the facts:
A survey of distillers? grains from several Minnesota and South Dakota plants revealed that average concentrations of phosphorus and sulfur were 0.89% and 0.47%, respectively, but fluctuations in content ranged from 0.68% to 1.09% and 0.12% to 0.82%, for phosphorus and sulfur, respectively. Requirements for S in diets of growing cattle are 0.15% of the diet dry matter
Source: http://www.extension.umn.edu/Beef/co...DiCostanzo.htm

In the southeast, the use of soybean hulls and corn gluten feed as supplements for forage-based beef systems is common with distillers grains supplementation increasing. The phosphorus concentration for 615 samples of corn gluten feed and 3,519 samples of dried distillers grains analyzed by Dairy One laboratory was 1.04% and 0.88%, respectively. Assuming an intake of 3 lbs of corn gluten or distillers grains, the intake of phosphorus would be 14 gm and 12 gm from each of these sources, respectively. At a substitution rate of 0.5 lb of forage for each 1 lb of supplement, forage intake would be reduced only 1.5 lbs. Following the scenario above, a 2.6% intake level for a 550 lb calf would be near 15 lbs or 13.5 lbs of forage and 1.5 lbs of supplement resulting in 10 gm of available phosphorus from the forage. Total available phosphorus intake is calculated to be 22 to 24 gm or 200% to 218% the recommended phosphorus intake.[/
Source: http://www.cattlenetwork.com/Cattle-..._NEWS_&aid=760

Mix:
Hay ---------------@ 8% protein ------------1,000 lbs ------- 50% of total mix
Corn gluten ------@ 15% protein ------------500 lbs --------25% of total mix
Cottonseed hulls @ 3% protein --------------500 lbs--------25% of total mix

What is the protein value of this mix?

How do you adjust the mix to compensate for the high levels of sulfur and phosphorus to make it safe?
What is the protein value adjusted for the sulfur and phosphorus?
Can you reach a 12 % or 16% protein safe mix using only these three ingredients?

Here is a sight I found that was somewhat helpful but I couldn?t quite comprehend it all.
Formulating Rations With the Pearson Square
http://www.ext.colostate.edu/pubs/livestk/01618.html

Any and all help would be greatly appreciated.
Thanks in advance and my moooo cows thank you also.
oldtimer

Date Subject Author
12/19/10 H gill
6/22/11 Angela Richardson