The 4th International Forum on Trace Element and Feed Safety was held in Changsha on September 23-24. Academicians and experts at home and abroad, and technical directors of well-known enterprises gathered in Changsha to discuss topics such as the value of the trace element ecological chain and the specific restoration measures of the ecological chain.
On the 24th, Dai Jinjun, senior engineer of animal nutrition at Anqi, gave a report on "Development and Application of Organic Trace Elements in Yeast" at the meeting. It is proposed that the bioavailability of trace elements determines its absorption effect in animals, and yeast organic trace elements are superior to other inorganic or organic trace elements in absorption rate.
1, the nutritional nature of trace elements
a trace element as a coenzyme or cofactor of metabolic enzymes in the body, affecting the metabolism of nutrients.
b There is an interaction between mineral elements.
c Bioavailability affects its application.
2, the mainstream organic trace elements
Metal elements such as copper, iron, manganese, etc. are more likely to form complexes or chelates, while "selenium" is not easily combined to form complexes or chelates, and yeast selenium is required to be formed by biotransformation.
3, the absorption rate of organic trace elements comparison
(1) Selenium
Yeast selenium is safer, more efficient and environmentally friendly.
The apparent utilization of yeast selenium is significantly higher than that of sodium selenite.
(2) Chromium
The absorption rate of yeast chromium is significantly higher than other forms of chromium.
(3) Copper
Compared with copper sulfate, yeast copper can significantly increase liver copper concentration, indicating that yeast copper has a higher utilization rate.
(4) Iron
(5) Manganese
With the myocardial, liver, tibia and MnSOD as indicators, the relative biological titer of yeast manganese was higher than that of manganese acetate and manganese sulfate.
4, the key point of yeast organic trace element production process
a key point: high enrichment ability strain breeding;
Example: Organic selenium content in yeast selenium: 1000ppm-2000ppm-3000ppm
b key point two: stable production process and indicators;
Example: The content of organic selenium and selenomethionine in yeast selenium.
c key point three: environmentally friendly
The enrichment efficiency in the production process reduces the difficulty of environmental protection.
5, yeast organic trace elements application prospects
a Establish and develop new methods and technologies for microbial breeding, and obtain new strain resources.
b Develop products related to safe, efficient, stable and sustainable industrial production.
c Develop enhanced or composite products (such as selenium and chromium) for different needs of animal species, growth stages, and environment.
A variety of trace elements are simultaneously enriched. Example: Enrichment of iron and zinc (Zhanyong Wang, 2011); enrichment of the four elements of zinc, copper, selenium and tellurium (Wang Xu et al., 2014).
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