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41. Figure the % digestible energy and the % metabolisable energy of a ration from the following data: 1000 grams of feed (dry matter) was fed and feed dry contains 3.00 Kcal/gram. 100 grams of feces (dry) was collected after feeding that feed, and it contained 5.00 Kcal/gram. The urine collected contained 250 Kcal. % DE? (2 pts) % ME? (2 pts) 42. Figure the % digestibility of the dry matter from the previous data. (2 pts) 80. Balance a ration for a 600 pound growing steer. Feed 3/4 pound of dry matter per 100 pounds of body weight as corn silage (0.75%). Meet the rest of his energy and protein needs from corn and soybean meal. Report the daily ration on both a dry matter and as-fed amount to feed. (show your work or I can’t give you any partial credit). (The following table shows the requirements for TDN (13 lbs) and CP (2 lbs), followed by the % of each nutrient in each feed). (12 pts) DM TDN,% TDN,lbs CP,% CP,lbs Requirements 13 2 ________________________________________________________________ Corn Silage 35 65.7 8.1 Corn 86 93 10 SBM 90 87 50 DM lbs As-Fed lbs corn silage _______ _______ corn _______ _______ SBM _______ _______ Are there any other nutrients we should be concerned about? (what?) 78. Balance a ration for a pig to contain 15% crude protein, 0.5% Phosphorus and 0.6% Calcium. Leave 3% initially for vitamins and minerals, and use corn, sorghum and soybean meal . Include 20% sorghum , 0.50% salt, vitamins at 10 pounds/ton and trace mineral premix at 2 pounds/ton. Add extra corn (on the “other” line) to finish filling the slack space. Calculate the %TDN in the ration. (12 pts) To save time, you don’t have to calculate the amount of Dical and Limestone – – merely show how by setting up the equations. Then use the following figures: Dical = .93, Limestone = .88 FEEDSTUFF ANALYSIS (%): Feed CP Ca P TDN DM Corn 9 .02 .28 90 88 sorghum 8 .02 .27 86 30 SBM 44 .25 .60 85 90 Dical 0 22.0 18.5 0 100 Limestone 0 38.0 0 0 100 Answers: Corn __________ Sorghum __________ SBM __________ Dical __________ Limestone __________ Salt __________ Vit premix __________ TM premix __________ other __________ —————————————- Total __________ 79. What is the %TDN in Ration _______________

  1. Figure the % digestible energy and the % metabolisable energy of a ration from the following data: 1000 grams of feed (dry matter) was fed and feed dry contains 3.00 Kcal/gram. 100 grams of feces (dry) was collected after feeding that feed, and it

contained 5.00 Kcal/gram. The urine collected contained 250 Kcal.

% DE? (2 pts)

% ME? (2 pts)

  1. Figure the % digestibility of the dry matter from the previous data. (2 pts)
  2. Balance a ration for a 600 pound growing steer. Feed 3/4 pound of dry matter per 100 pounds of body weight as corn silage (0.75%). Meet the rest of his energy and protein needs from corn and soybean meal. Report the daily ration on both a dry matter and as-fed amount to feed. (show your work or I can’t give you any partial credit). (The following table shows the requirements for TDN (13 lbs) and CP (2

lbs), followed by the % of each nutrient in each feed). (12 pts)

DM TDN,% TDN,lbs CP,% CP,lbs

Requirements 13 2

________________________________________________________________

Corn Silage 35 65.7 8.1

Corn 86 93 10 SBM 90 87 50

DM lbs As-Fed lbs

corn silage _______ _______

corn _______ _______

SBM _______ _______

Are there any other nutrients we should be concerned about? (what?)

  1. Balance a ration for a pig to contain 15% crude protein, 0.5% Phosphorus and 0.6% Calcium. Leave 3% initially for vitamins and minerals, and use corn, sorghum and soybean meal . Include 20% sorghum , 0.50% salt, vitamins at 10 pounds/ton and trace mineral premix at 2 pounds/ton. Add extra corn (on the “other” line) to finish filling the slack space. Calculate the %TDN in the ration. (12 pts)

To save time, you don’t have to calculate the amount of Dical and Limestone – – merely show how by setting up the equations. Then use the following figures: Dical = .93, Limestone = .88

FEEDSTUFF ANALYSIS (%):

Feed CP Ca P TDN DM Corn 9 .02 .28 90 88 sorghum 8 .02 .27 86 30 SBM 44 .25 .60 85 90

Dical 0 22.0 18.5 0 100 Limestone 0 38.0 0 0 100

Answers:

Corn __________ Sorghum __________ SBM __________ Dical __________ Limestone __________ Salt __________

Vit premix __________ TM premix __________ other __________

—————————————-

Total __________

  1. What is the %TDN in Ration _______________

 

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