Learn from the European experience to reduce environmental pollution and promote the development of pig farming.

;learn from European experience, reduce environmental pollution, promote the development of pig farming RVgRVg- The investigation report on the use of synthetic amino acids in major pig-breeding countries in Europe and AsiaRVgthe 18th Report of the Party'sin2012,made a strategic decision tovigorously promote the construction of ecological civilization, and increase the intensity of natural ecosystems and environmental protection. Strengthen water, atmosphere, soil and other pollution prevention and control.2015, the Fifth Plenary Session of the 18th Central Committee, the strengthening of ecological civilization construction was first written into the national five-year plan,ecological development has been an important measure of future development, do a good job in pollution prevention and control, from the root causes to solve the pollution problem is an important way to achieve ecological development;. RVgthe pig industry plays a major role in animal husbandry,with theworldpopulation growth andimprovement in people's living standards, global pork consumption has grown strongly in the past 20years, at a rate of nearly 50%,2014of 51% of thetotal meat production; As a leader in pig farming, China's pork consumption grew strongly, with a growth rate of 13%in the past500,000,2014accounted for 65% of China's total meat production. . RVg the growing environmental challenges brought about by the pig industry , with the improvement and implementation of national environmental legislation, many provinces and cities have developed more stringent breeding regulations. Is raising pigs sure to bring pollution? Europe, which has a similar land and population situation to ours, has done a better job of controlling pig pollution: the pig kingdom of Denmark has an area of 43,000 square kilometers km but can produce 30 million pigs a year (of which 10 million export weight 7-15 kg). And those who have been to Denmark will certainly be impressed by the green mountains and waters there. . RVg show that pollution can be avoided with comprehensive measures. Pig-breeding pollution is mainly caused by the imbalance of amino acids in the daily material to cause a large amount of discharge of nitrogen and phosphorus in feces and phosphorus, which causes the of environmental pollution of subspecies, nitrogen pollution in terms of weight is more than ten times the former. The appropriate addition of amino acids in the grain , in accordance with the amount of digestible amino acidneeds reasonable preparation of low-protein grain , is of great significance to reduce environmental pollution ; . RVg major pig-breeding countries in Europe and Asia and various stages of pig protein and amino acid levels RVg major pig-breeding countries in Asia are China, Thailand and Vietnam. Europe is Denmark, Germany and Spain. The number of pigs out of the year and feed yield are shown in the table 1 . . RVg table 1 annual number of pigs and feed production in major european pig-breeding countries ( 2015 , forecast) RVg region RVg National RVg pork production, 10 million tons of rVg , 10 million RVg feed production, 10 million tons of R Vg rVg . 5.40 RVg 65 RVg 8500 RVg RVg RVg 2 RVg RVg 50 0 RVg RVg RVg 3 rVg 800 RVg. RVg European RVg RVg RVg 6-8 RVg 900 rVg 900 RVg RVg RVg RVg 1000 RVg RVg . . 0.16 RVg 2-3 RVg 300 RVg in order to increase the exchange of pig-breeding countries in the world, learn from the advanced experience of advanced countries to reduce nitrogen emissions, promote the sustainable development of pig farming in developing countries, Win-Win-De-Gusai in the world's major pig-breeding countries pig nutrition level and synthetic amino acids by the feeding stage of research. The breeding stage is divided into piglets ( 15 kg), growth ( 15-30 kg) and fattening ( 30 kg -plus ). The levels of protein sein and important amino acids and the level of addition are shown in the table 1 to table 7 . . RVg table 2 piglets ( 15 kg) stage of the diet nutrition level of RVg region s RVg national RVg protein, % RVg lysine, % RVg sunine, % RVg methionine, % RVg . tryptophan, . % RVg Asia RVg RVg RVg 20 RVg 1.28 RVg 0 RVg 0.39 RVg 0.22 RVg RVg 20 RVg . . RVg 0.84 RVg 0.45 RVg 0.28 RVg RVg 20 RVg 1.29 RVg 1.29 RVg 0.39 RVg 0.22 RVg rVG RVG . RVg 0.50 rVg rVg RVg RVg , , Germany, r Vg 0.91 RVg 0.5 0 R Vg RVg 19.9 RVg 1.36 RVg 0.98 rVg . 0.47 RVg 0.29 RVg RVg 19 RVg 1.41 RVg b.