At present, there are some practical problems in the use of suckling pigs:
At present, the standard of good and teaching materials should be:
1 Suckling Nutrition Needs Characteristics
1.2 Proteins and Amino Acids Need
1.3 Mineral needs and vitamins need
1 different varieties, there will be slight differences;
4 parts of the experimental design gradient is less, affecting the accuracy of the results;
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