(1) Formulation design example of trace element premix Take the formula design of trace element premix for fattening beef cattle as an example:

1. Determine the amount of trace elements according to the feeding standards. The trace element requirement for fattening beef cattle is found from the national beef cattle breeding standards, that is, the amount added per kilogram of diet; copper is 8mg, iodine is 0.5mg, iron is 50mg, manganese is 40mg, selenium is 0.1mg, and zinc is 30mg, cobalt is 0.1mg.

2. Selection of trace element raw materials. There are many trace element feed additives in the production, and their chemical structure, molecular formula, element content, purity, etc. are different. Choose according to the actual situation.

3. Calculate the amount of commodity raw materials. mineral premixAmount of raw materials for full-price compound feed per kilogram = the required amount of a certain trace element/the content of the element in pure product/purity of commodity raw materials The amount of commercial raw materials per ton of full-price compound feed = the amount of commercial raw materials per kg of full-price compound feed * 1000.

4. Calculate the amount of carrier. If the premix accounts for 0.2% of the full price batch, the amount of the carrier in the premix is ​​equal to the difference between the amount of the premix and the amount of the micro-salt commercial raw materials. That is: 2kg-0.54629kg=1.45371kg.

(2) Take the formula design of vitamin additive premix as an example:

1. Determination of the required amount and added amount. Checking beef cattle feeding standards can obtain the vitamin requirements of lactating cows, and consider the production process of premix, the processing process of mixed feed, and the possible loss and attenuation during feeding to determine the actual added amount. The standard requirement is vitamin A3200 international unit, vitamin D1200, adjusted according to the level of feeding tube, work experience, etc. The added amount given is: vitamin A6400IU, vitamin D2400IU, vitamin E30IU.

2. Calculate the amount of raw material based on the active ingredient content of the vitamin commodity raw material. Commercial vitamin raw material dosage=a certain vitamin dosage/the effective content of a certain vitamin in the raw material.

3. Antioxidant. Choose BHT and add 0.8g/t.

4. Calculate the amount of carrier and list the production formula. The dosage of the carrier is determined according to the dosage of the set vitamin additive premix in the full-price material, and the dosage of multi-dimensional is set to 500g/t here.

(3) Composite premix formulation design The composite premix design steps are basically similar to those when designing trace element or vitamin premix formulations, that is, determine the addition amount, select the raw materials, determine the effective ingredient content, and calculate the amount of each raw material and carrier And percentage.

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