Pig users should do everything possible to do a good job in feed mix, reduce production costs, so as to reduce their own investment and improve pig income. What principles should be followed in the formulation of pig feed?

1、营养适宜。配方中各营养水平之间达到平衡，其中特别注意氨基酸的平衡。

1. The nutrition is suitable. In the formula, the balance of nutrition levels is achieved, especially the balance of amino acids.

2、体积适中。应注意猪的采食量与饲料体积大小的关系，体积过大吃不完，体积过小吃不饱，公猪料体积过大易造成垂腹。

2. The size is moderate. We should pay attention to the relationship between pig's feed intake and feed volume. If the pig's feed volume is too large, it can't be eaten completely. If the pig's feed volume is too large, it is easy to cause sagging.

3、廉价。应根据生产需要，提高配合饲料的档次，并根据市场变化，随时调整配方，获得经济效益。

3. High quality and low price. According to the needs of production, the grade of compound feed should be improved, and the formula should be adjusted at any time according to the change of market price, so as to obtain economic benefits.

4、多样化。合理搭配多种饲料，以发挥各种物质的互补作用，提高饲料的利用率。

4. Diversity. In order to play the complementary role of various substances and improve the utilization rate of feed, a variety of feeds should be reasonably mixed.

5、粗纤维含量。仔猪不超过3%，生长猪不超过6%，种猪不超过12%。

5. Crude fiber content. No more than 3% of piglets, no more than 6% of growing pigs and no more than 12% of breeding pigs.

6、适口性。适口性好的多用，适口性差的少用。

6. Palatability. The one with good palatability should be used more, and the one with poor palatability should be used less.

7、灵活应用。选择适宜的饲养标准和饲料成分，通过饲养试验，观察猪的生长发育及生产性能，进行酌情修正。

7. Flexible application. The suitable feeding standard and feed composition were selected to observe the growth, development and production performance of pigs through feeding test, and then to modify them as appropriate.

8、卫生指标。发霉变质和有毒性的饲料禁用。

8. Health indicators. Moldy and toxic feed is prohibited.

预混料使用时，不能直接添加，应使用倍比稀释法，且一定要搅拌均匀。更换预混料要循序渐进。突然更换预混料猪可能不适应，从而影响采食和生长。遵循这些原则相信养殖户一定会在投入少的情况下，养出健康的猪。

When premix is used, it can't be added directly, but the ratio dilution method should be used, and the mixing must be even. The replacement of premix should be carried out step by step. Sudden replacement of premix may not be suitable for pigs, which may affect feeding and growth. Following these principles, I believe that farmers will raise healthy pigs with less investment.