Scientific pig raising 100 questions and answers 42, how to design the formula of compound trace element additive premix?

For example, the formula of trace element additive premix is designed for the basic diet of 60-90kg body weight growing and finishing pigs. The steps are as follows: 1. Check the latest national feeding standard for lean growing and finishing pigs, from which it can be seen that the trace element requirements of 60-90kg growing and finishing pigs are as follows: iron 50 mg/kg diet, zinc 90 mg/kg diet, copper 3.75 mg/kg diet, manganese 2.50 mg/kg diet. Iodine 0.14 mg/kg diet, selenium 0.10 mg/kg diet. 2. Check the feed composition table and calculate the contents of trace elements according to the feed types in the existing basic diet formula. It is assumed that the corresponding contents of trace elements in the basic diet are as follows: iron 30 mg/kg air-dried diet, zinc 60 mg/kg air-dried diet, copper 2.75 mg/kg air-dried diet, manganese 1.50 mg/kg air-dried diet, iodine 0.04 mg/kg air-dried diet, selenium 0.05 mg/kg air-dried diet. 3. Calculate the addition amount of various trace elements required: requirement-content in basic diet = addition amount of iron: 50-30 zinc: 90-60 zinc: 3.75-2.75-1.00 manganese: 2.50-1.50-1.00 iodine: 0.14-0.04-0.10 selenium: 0.10-0.05-0.04. Select suitable raw materials for trace element additives to calculate iron, copper, Percentage content and coefficient of manganese, zinc, iodine and selenium (coefficient is the multiple of the molecular weight of the compound and the element) For example, if ferrous sulfate contains seven crystalline water and the molecular formula is FeS04 7H2O, check the periodic table of chemical Mendeleev elements and check the atomic weights of each element as follows: FeS04 7H2O Atomic weight of iron = 56 sulfur atomic weight = 32 oxygen atomic weight = (16 × 4) = 64 7 molecular water atomic weight = (1 × 2 "16) × 7" 126 total: 56 "32" 64 "126" 278% iron content in ferrous sulfate compounds = 56278 "20.1% and its purity (%) is listed as follows: ferrous sulfate molecular formula: FeSO4 7H2O, Fe element content 20.10%, coefficient 4.98, purity 98.5% Copper sulfate molecular formula CuSO4 ·5H2O, Cu element content 25.50%, coefficient 3.92, purity 96.0%; manganese sulfate formula MnSO4 ·H2O, Mn element content 32.90%, coefficient 3.04, purity 98.0%; zinc sulfate formula ZnSO4 ·5H2O, Zn element content 22.70%, coefficient 4.41, purity 98.0% The potassium iodide molecular formula KI,I element content is 76.40%, the coefficient is 1.31, the purity is 98.0%; the sodium selenite molecular formula NaSeO3 ·5H2O, the Se element content is 30.005%, the coefficient is 3.33, the purity is 95.0%. Note: coefficient = molecular weight of ferrous sulfate / Fe atomic weight = 278 + 56-4.96 if calculated according to 20.1% of Fe element, coefficient = 100 + 20.1-4.975-4.98 calculated according to 25.5% of CU element The coefficient = 100 mg/kg 25.50 × 3.925, the corresponding pure compound raw material weight (pure raw material weight = should be added × conversion coefficient = 20 × 4.98=99.60mg/kg diet) is as follows: iron should be added 20 mg/kg diet, conversion coefficient 4.98, pure raw material weight 99.60mg/kg diet Zinc should be added to 30 mg/kg diet, conversion coefficient 4.41, pure raw material weight 132.30 mg/kg diet, copper should be added to 1.00mg/kg diet, conversion coefficient 3.92, pure raw material weight 3.92mg/kg diet, manganese should be added to 1.00mg/kg diet, conversion coefficient 3.04, pure raw material weight 3.04mg/kg diet The amount of iodine should be added to 0.10mg/kg diet, conversion coefficient 1.31, pure raw material weight 0.131mg/kg diet, selenium should be added to 0.05mg/kg diet, conversion coefficient 3.33, pure raw material weight 0.167mg/kg diet. 6. The weight of pure raw material is converted into commercial raw material weight: corresponding commodity raw material quantity = corresponding pure raw material quantity / corresponding commodity raw material purity × 100 × 101.12 adding element iron, corresponding pure raw material quantity 99.60 mg, corresponding commodity raw material purity 98.5%, corresponding commodity raw material quantity 101.12 mg. Add element zinc, corresponding pure raw material quantity 132.30mg, corresponding commodity raw material purity 98%, corresponding commodity raw material quantity 135.00mg; add element copper, corresponding pure raw material quantity 3.92mg, corresponding commodity raw material purity 96%, corresponding commodity raw material quantity 4.08mg; add element manganese, corresponding pure raw material quantity 3.04mg, corresponding commodity raw material purity 98%, corresponding commodity raw material quantity 3.10mg Adding element iodine, corresponding pure raw material quantity 0.131mg, corresponding commodity raw material purity 98%, corresponding commodity raw material quantity 0.13mg; adding element selenium, corresponding pure raw material quantity 0.167mg, corresponding commodity raw material purity 95%, corresponding commodity raw material quantity 0.18 mg. 7. Determine the dosage of the premix and calculate the amount of carrier. It is determined that the usage of the premix is 1%, that is, 1% of the total feed. If we know from the sixth step that the total amount of commercial raw materials of several elements is 101.12+135.0+4.08+3.10+0.13+0.18=243.61mg, the amount of carrier is 10-0.24361g 9.75639, that is, the addition amount of each kilogram of feed is 10g, and 9.75639 of the premix is the carrier. 8. Choose a suitable carrier. It is now determined to use light calcium carbonate powder as the carrier. 9, that is, the premix formula (such as below) after listing the premix formula, the formula should be annotated, indicating the compound trace element premix additive suitable for 60-90kg body weight growing-finishing pigs, indicating that the formula product should be mixed well with the feed in the proportion of 1%, and finally signed by the technical supervisor and written on the year, month and day. Premix formula of trace element additive for 60-90kg growing and finishing pigs: ferrous sulfate 101.12 mg,1.01%, zinc sulfate 135.00 mg,1.35%, copper sulfate 4.08 mg,0.041%, zinc sulfate 1.33 kg, copper sulfate 4.08kg, zinc sulfate 1.33kg, copper sulfate 4.08kg. Manganese sulfate 3.10 mg,0.031%, premix requirement 31 g, potassium iodide 0.13 mg,0.001%, 1g per 100kg premix production, sodium selenite 0.18 mg,0.002%, 2g per 100kg premix production, carrier (light calcium carbonate) 9956.39 mg,97.564%, 97.564 kg per 100kg premix production, total 100kg. According to the above premix formula, the commercial raw materials ferrous sulfate 1.01kg, zinc sulfate 1.33kg... Carrier 97.564kg, mixed evenly to form 100kg, which is the trace element additive premix for 60-90kg finishing pigs. (this content is extracted from the "100 questions and answers on Scientific Pig raising" edited by the Association of Old Science and Technology Workers in Yingtan City and edited by Zhang Genkai.) 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