Core Tip: The amino acid nutrient requirements of lean-growth pigs and their effects on growth performance, economic benefits and the environment are detailed below.
First, lysine
1. When the digestible lysine reaches 1.42, the daily gain is the highest, and the meat ratio is also expected. The requirement for true digestible lysine in 11-25 kg body weight piglets is 1.33% of the total amount of amino acids.
2. The ratio of sulfur-containing amino acid to lysine is reasonable at 59%-60%. This data was obtained from a 1480 pig trial.
Second, isoleucine
The best proportion of piglets that can digest the light-emitting amino acids requires 46% in the corn-soybean meal diet and 65.7% in the corn-snow powder diet.
For piglets, if they are fed snowball powder, the ratio of snails needs to be increased by 0.2% compared with NRC, but the corn meal is not much changed. In addition, the ideal amino acid pattern does not change much.
Third, the environment
The research environment in the field of nutrition mainly studies the excretion of nitrogen and phosphorus.
1. Low protein diet. Increased nitrogen excretion due to increased synthetic amino acid feeding, reduced use of soybean meal, replacement with synthetic amino acids is a cost-reducing method, while reducing the amount of protein in the diet. The protein in the diet was reduced by 1% and the total nitrogen excretion was reduced by 10%.
2. Reduce the ammonia content in the air by 60% and reduce the H2S by 30%.
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