Where is the way to control pig pollution?
Dingyuan, professor and director of South China Agricultural University, talks about pollution control at the China Pig Industry Status Forum.
Feng Dingyuan (President, Professor, Doctoral Supervisor, Institute of Dynamics, South China Agricultural University):
Through such a means of nutrition and rearing, it should be said that one-third or even half of the pollution of pigs can be reduced. There is a lot of data to show that big pollution is phosphorus pollution. After reducing one-third to one-half of the emissions, we rely on some non-nutritive non-feeding or other environmentally friendly settings. It should be said that pollution can be controlled to a certain extent. So where are we going to control pollution? It is to rely on these large, technically and socially responsible companies such as twins to control them.
We know some knowledge of the pig industry, and the pressure of environmental pollution is increasing to some extent, and it will even surpass other aspects in the future. The main pollution of farming is nitrogen and phosphorus, and pig raising is the most important pollution. In the process of raising, we need to use water to wash the barn. A lot of water will enter the rivers and rivers and enter the soil. Then most of the nitrogen and phosphorus in the farm will be discharged into the environment, only about one-third. It is layered in animals, and more than 70% of it is discharged into the environment. A pig from weaning to 100 kg consumes 8 or 9 kg of nitrogen and only 3 kg is converted into meat. A million pigs have 12,000 tons of waste. Moreover, these large amounts of nitrogen accumulate in the soil, and accumulation must be an irreversible existence. In addition to nitrogen, the other is phosphorus pollution. Phosphorus pollution is cumulative and irreversible. It should be said that the pollution caused by phosphorus pollution is a problem that is not noticed by everyone. Then we know that the phosphorus pollution caused by the pig industry, a large number of diffusion-oriented phosphorus has been dispersed into the rivers and lakes for many years, then he is a pollution that is more difficult to manage. In addition to the pollution of nitrogen and phosphorus, there are some metals, especially some heavy metals, which accumulate a large amount of pollution in a collective environment, causing soil compaction. There are many ways to reduce nitrogen emissions. Low-protein diet formulation is the most effective way to reduce fecal emissions; dietary protein use can reduce ammonia (a reduction of 2-4 points is completely feasible); use a net energy system to use energy in a truly useful place To reduce excess nitrogen; feed microbial additives - improve feed utilization, can also reduce nitrogen emissions and nitrogen pollution by more than 20%; improve feed utilization rate of 6.6%, ammonia emissions can be reduced. Feed processing through puffing and granulation can reduce the waste of nutrients (double investment of more than 50 million, the first to introduce puffing technology).
Well, we have talked about the experience of twins, which developed environmentally-friendly twin piglets, mainly to increase the feed-to-weight ratio of feed, which can reduce emissions. We also hope that twins will not only develop sow feed, but even other large pig feeds. In the face of more feed in the market and more fecal excretion, how can we make further efforts to develop environmentally friendly feed? It should be said that we are one of the future directions and the main way to solve the pollution of our breeding industry, especially the pig industry. . We can't hope that the scattered small-scale farmers can only hope that large-scale technology companies like the twins will do this work. In addition, some methods of wet feeding are used to improve the digestion and utilization of nutrients. In this respect, the dry materials summed up by the twins can be used to further increase the digestibility and also reduce the nitrogen emissions. Now the twins' 420123 model is a kind of grain-saving product model. Reducing materials is also a way to solve pollution.
It is conceivable that the Twin Group has developed a more environmentally friendly “twin feedâ€. Therefore, I said that solving pollution requires the ability and responsibility of twins; the company must bear.
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After more than 30 years of reform and opening up, China’s economy has developed rapidly, and the environment has been subjected to unprecedented destruction and pollution. Under the banner of “Pig Food Safety in the Worldâ€, the Chinese pig industry has rapidly entered the boom period of capital raising pigs, pig farms, pigs and pigs from thousands of years of loose-family status, and the problem of manure has become more and more popular. serious.
How to solve the damage caused by pigs to the environment? As the largest pig production company in China, the twins have made unremitting efforts on the issue of feed processing on this issue, and have made certain contributions to the development of China's pig industry and environmental protection -
Before the 1990s, the status quo in China was to run a pig farm and destroy a large forest due to boiled pigs. In 2003, the Twin Group took the lead in proposing a dry-feeding model to change the state of farmers from a large pot of boiled pigs for thousands of years, which freed the peasants from heavy labor and saved a lot of firewood. This reduces carbon emissions and protects large areas of forest. The green area of ​​Jiangxi ranks first in the country. From the perspective of raising pigs without firewood, the twin groups have made significant contributions.
Subsequently, on the basis of continuous exploration, continuous practice and constant adjustment, the twin group finally selected the best twin “420+ trough†scientific pig raising model for the households. The “420+ trough†pig raising model has realized the scientificization of pig raising, making the pig raising process simple and saving labor. The large-scale breeding of the households, according to the "420 + trough" scientific pig raising model, raising pigs has become a very easy and simple thing, just follow the number "fool" feeding, you can grow pigs, fast Long pig. And the sale to the live pig can be released one month ahead of schedule. Twin 420123 scientific pig raising mode uses 528 kg of whole pigs in the whole process, the ratio of meat to meat is 2.4:1, which is 25% more than the ratio of self-adhesive meat to 3.2:1, and the sales volume of twin pigs in 2012 is 7.5 million tons. More than 2 million tons of feed. The reduction of feed consumption is undoubtedly the reduction of pig excrement, and indirectly achieves the effect of reducing emissions. According to Professor Feng Dingyuan’s claim of 12,000 tons of waste from a million pig farms, the twins saved more than 2 million tons of feed, which is equivalent to 700 million pig farms without emissions, which is equivalent to reducing emissions by more than 8.4 million tons. (Wenrui)
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