Lysine and threonine nutrition need new research progress and optimal proportional relationship

1) The starting weight of the pig is 8.6kg. When the true digestible threonine content of the diet is 120% of the NRC, ie 1.03%, the pig receives the maximum daily gain;

2) The optimal immune function of weaned piglets is higher than the amount of threonine required to satisfy the maximum growth;

3) When the threonine/lysine in the 30-120kg pig diet is 0.70, the pig gets the maximum daily gain;

4) When the threonine/lysine in the 30-120kg pig diet is 0.70, the pig obtains the most suitable feed conversion efficiency;

5) When the threonine/lysine in the 30-120kg pig diet is 0.70, the pigs get the best economic benefits;

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