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Ration Formulation 2/05/2001 ANS 336. 1.Steps in Balancing a Ration Nutrient requirements generally represent the minimum quantity of the nutrients that.

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Presentation on theme: "Ration Formulation 2/05/2001 ANS 336. 1.Steps in Balancing a Ration Nutrient requirements generally represent the minimum quantity of the nutrients that."— Presentation transcript:

1 Ration Formulation 2/05/2001 ANS 336

2 1.Steps in Balancing a Ration Nutrient requirements generally represent the minimum quantity of the nutrients that should be incorporated. Factors to be considered –Age –Sex –Body Size –Type of production –Intensity of production

3 2.Steps in Balancing a Ration Ruminants: Determine what feeds are available and list their respective nutrient compositions –Dry matter –Protein –Energy –Phosphorus –Calcium –Vitamin A –Vitamin D if confined Non ruminants same as Ruminant, but: –Dry matter –Protein Essential AA –Energy Essential Fatty acids –Phosphorus –Calcium –Vitamin A,D, E and B complex –Minerals

4 3.Steps in Balancing a Ration Feed cost Processing Cost Transportation Cost Storage Cost Antioxidant Refrigeration Cost Nutritive value loss with storage

5 4.Steps in Balancing a Ration Balance a ration that is useable. –Can they eat that much, can they utilize that source of the ingredient. Limitation of feed ingredients –Consumption levels –Limiting values such as: amount of forage that can be consumed. –Wheat as percentage of diet –Cottonseed limitations

6 5.Steps in Balancing a Ration Convert to Dry Matter Basis: 1. Conversion of feed nutrients from an as fed to a dry matter basis: –a. Assume alfalfa silage analyzed 7 % crude protein on an as-fed basis and contained 40% dry matter. What percent crude protein would the alfalfa contain when expressed on a dry matter basis? The solution for this example can be obtained by the following equation: –% Nutrient ( As fed basis ) = % Nutrient (dry matter basis) % Feed Dry Matter100 % dry matter

7

8 Methods of Formulation Square Method (Pearson Square) Trial and Error Simultaneous Equation Method 2 X 2 Matrix method Computer Method WAG Method – not recommended

9 Feeds Available Ingredient (As Fed basis) TDN (%)Crude Protein (%) Alf. Hay, All Analysis 51.016.0 Corn Silage 18.02.2 Corn All Analysis 80.09.9 Oats, all analysis 69.011.9 Soybean Meal, 44% 76.044.4

10 Holstein Cow TDN and CP Req. 1433 lb BW, 65 lbs of milk, 4% Butter fat TDN (lbs.) Crude Protein (lbs) (g) Maintenance9.940.94428 Milk Production 20.95.872,665 Total30.846.813,093 Needs

11 Determining Consumption Cow will eat about 2 % of her body weight in forage –2 % X 1433 = 28.66 lbs –1.2 – 2 % of her body weight in Concentrate [ ]. –Hay is 14# –Corn Silage is 14 # 40 X 35% (DM) = 14 #

12 From Forage TDNCrude Protein (Lb.) Alfalfa, Hay7.142.24 Corn Silage7.20.88 Total from Forage 14.343.12

13 Supplied TDNCP Needs30.846.81 Forage14.343.12 Remainder16.53.69

14 Trial and Error Conc. Mix. TDNCP Corn, 700 #560.069.30 Oats, 280 #193.233.3 Monosodium Phosphate -- Salt-- Total753.2102.60 Percent75.310.3

15 Needs from Concentrate Mix Divide TDN from concentrate (16.5) by the % TDN in the mixture (75.3). –16.5/0.753 = 21.9 lbs of TDN to meet energy req. Multiply 21.9 times 10.3% CP in mix –21.9 X.103 = 2.26 –3.69 (needed) – 2.26 = 1.43 still needed Substitute 175 # of SBOM to concentrate mix. In place of that amount of corn.

16 Trial and Error Conc. Mix. Weight (lbs.) TDNCP Corn525420.052.0 Oats280193.233.3 Soybean Oil Meal (SBOM) 175133.077.7 Monosodium Phosphate 10-- Salt10-- Total1000746.2163.0 Percent74.616.3

17 Trial and error - Guess 16.5 lbs /.746 = 22.1 of conc to supply 16.5 lbs of TDN 3.69 lbs protein needed/.163 of protein = 22.63 = 22.63. Therefore, we feed 22.63 lbs of concentrate to meet all requirements with a little extra energy.

18 Supplied Lbs. Intake DM (lbs) TDNCrude Protein(CP) Alfalfa, 90% DM 1412.67.12.2 Corn Silage, 35% DM 40147.20.9 Conc. Mix, 90% DM 22.6320.3716.93.7 Total76.6346.9731.26.8

19 Holstein Cows consumption Cows will eat approximately 3.0 to 4.0 % of the body weight in dry matter depending on the stage of lactation. 2 % from Forage and the remainder from Concentrate mixes. Next we need to figure the NDF amount to see what level of forage she can consume. Consume. 1.2 % BW in NDF with 0.9 % from Forages and 0.3 % from Concentrates.

20 NDF requirements 1.2 % X 1433 = 17.2 lbs NDF 0.9 % BW from forage = 12.9 –12.6 X 55.0 = 6.93 –14.0 X 59.0 = 8.26 15.19

21 Pearson’ Square Simple nutrient needs are met with simple feed formulas. Lesser values are subtracted from greater values. Recorded diagonally. One feed must have a value higher than the desired value and one must have a value lower than the desired value.

22 X A B C D Pearson Square A – X D B – X C Total Need Percentage = =


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