اقتراحات لتحسين تأثير الوجبات الغذائية منخفضة البروتين للخنازير المرضعة

  1. Concerns in diet formulation design and raw material selection
  • Energy

The low-protein diet formula for suckling piglets should be designed using the net energy system as much as possible, so that the effect of feed usage can not be affected by the level of protein content.

The digestible energy system and metabolizable energy system overestimated the effective energy value of high-protein and high-fiber diets, while underestimated the effective energy value of high-starch or high-fat diets;

Net energy is not affected by the weight (maturity) of the animal or the degree of development of the digestive tract;

NE takes into account the differences in ME metabolic utilization among different nutrients;

In the energy evaluation system, NE is the only energy evaluation system that expresses energy requirements and dietary energy concentration on the same basis, at least theoretically not affected by the chemical composition of the feed (Noblet et al., 2004);

NE can better estimate the performance of pigs.

  • Protein

While reducing the protein content in the diet, the digestibility and utilization rate of feed protein should be moderately improved, and the digestibility of protein should be used as an important assessment index to participate in the design of feed formula. To ensure that the apparent digestibility of the feed protein at the end of the ileum matches the digestibility of the suckling piglet:

The apparent digestibility of protein in the terminal ileum of the whole feed for piglets about 6kg is 70% (Yun et al. 2005)

The apparent digestibility of protein in the terminal ileum of the whole feed for piglets about 10kg is 75% (Blasco et al. 2005)

The apparent digestibility of the terminal ileum protein of the whole feed for piglets about 25kg is 85% (Zhang et al. 2013)

Feed raw materials contain a large amount of minerals, vitamins and trace elements. In formula design, the inherent nutrients in feed raw materials are fully utilized to reduce the addition of exogenous single nutrient substances and reduce feed costs.

  • Effective control of toxic and harmful substances and anti-nutritional factors in feed

There are many types of anti-nutritional factors and toxic and harmful substances in feed. Pigs, especially young pigs, are sensitive to these anti-nutritional factors, and it is easy to exceed the limit requirements in the process of feed preparation, resulting in the destruction of intestinal epithelial structure and the decline of production performance.

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