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Formulation supplementary feed for milk production

Its energy, crude protein, Ca and P content should be identical to those of milk. The nutrient content of 1 litre milk containing 4% fat are: 3.1 MJ NEl, 87g crude protein. Therefore the protein to calorie ratio (PCR) of the supplementary feed should also be 28 (87/3.1). (28-PCRl) x NEll

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Formulation supplementary feed for milk production

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  1. Its energy, crude protein, Ca and P content should be identical to those of milk. The nutrient content of 1 litre milk containing 4% fat are: 3.1 MJ NEl, 87g crude protein. Therefore the protein to calorie ratio (PCR) of the supplementary feed should also be 28 (87/3.1). (28-PCRl) x NEll The formula: p = ------------------------------- (PCRh-28) x NElh Where: p = the amount of protein concentrate (PCR>28) should be given to 1 kg energy source (cereal grain) (PCR<28) PCRl= PCR value of the energy source PCRh= PCR value of the protein concentrate NEll= NEl content of the energy source NElh= NEl content of the protein concentrate Formulation supplementary feed for milk production

  2. Formulation supplementary feed for milk production Example: d.m. NEl c. protein. Ca P NEl c. protein Ca P PCR (g/kg) (MJ/kg d.m.) (g/kg d.m.) (MJ/kg) (g/kg) corn 912 8.57 103 0.2 3.5 7.82 94 0.18 3.2 12 extr. sunflower meal 896 6.38 412 2.3 10.3 5.72 369 2.1 9.2 64.5 (28-12) x 7.82 p = ----------------------- = 0.6 (64.5 – 28) x 5.72 So, 0.6 kg sunflower meal has to be given to 1 kg corn. 1 kg corn + 0.6 kg sunflower = 1.6 kg; 1/1.6 = 63% corn 0.6/1.6 = 37% sunflower

  3. Formulation supplementary feed for milk production How much should be given from this feed for one litre milk? NEl crude protein Ca P (MJ) (g) (g) (g) 0.63 kg corn 4.93 59 0.11 2.0 0.37 kg sunflower 2.12 137 0.78 3.4 In 1 kg feed 7.05 196 0.89 5.4 Needed for 1 litre milk 3.1 87 2.8 1.7 So for 1 litre milk 3.1/7.05; or 87/196 = 0.44 kg feed needed Controlling the Ca and P levels Ca (g) P (g) 1kg feed contains 0.89 5.4 0.44 kg feed 0.39 2.37 requirement : 2.8 1.7 The 2.41 g calcium deficit can be supplemented by limestone. 1kg limestone contains 380g Ca (see the table). So, for supplementing 1 g Ca 2.6 g limestone (1000/380) should be given. So, to 0.44 kg feed 6.27 g (2.41 x 2.6) limestone should be given. Each kg of feed needs 14.25 g (6.27/0.44) limestone supplementation.

  4. Exercise Prepare supplementary feed for milk production using wheat and soybean meal! The milk contains 4% fat and 3.3% protein. How much needed from this feed for one litre milk? Control the Ca and P level of the feed, use supplementation if needed! d.m. NEl c. protein. Ca P NEl c. protein Ca P PCR (g/kg) (MJ/kg d.m.) (g/kg d.m.) (MJ/kg) (g/kg) wheat extr. soybean meal

  5. Exercise How much should be given from this feed for one litre milk? NEl crude protein Ca P (MJ) (g) (g) (g) kg wheat kg soybean In 1 kg feed Needed for 1 litre milk So for 1 litre milk ............................................................kg feed needed Controlling the Ca and P levels Ca (g) P (g) 1kg feed contains .............. kg feed requirement : 2.8 1.7

  6. Exercise A 650 kg weight milking cow, kept in medium quality pasture, produce milk with 3,8% fat and 3,3% protein. The daily ration contains the following nutrients: dry matter : 16,5 kg NEl 105,5 MJ crude protein: 2133 g crude fibre: 3135 g How much milk can be produced from this ration?

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