Recently, the safety and high-efficiency feed additive innovation team led by Shi Bo, a researcher at the Feed Research Institute of the Chinese Academy of Agricultural Sciences, has made important progress in the research on the preparation of cellooligosaccharides using wheat straw, which makes the straw “turn waste into treasureâ€.
Crop straw is an important renewable biological resource in crop production system. In recent years, its development and utilization has attracted more and more attention. The annual output of wheat straw in China is 110 million tons, and the cellulose content in wheat straw is 35% to 40%. If the wheat straw resources can be fully utilized to produce cellulose oligosaccharides, the waste of wheat straw resources can be reduced, and the fiber can be produced. The selection of raw materials for oligosaccharides provides a basis while reducing the cost of preparation of cellooligosaccharides.
Using wheat straw as raw material, the researchers improved the yield of cellooligosaccharide and the total conversion rate of wheat straw by optimizing the enzymatic hydrolysis conditions. The cellobiose yield was increased to 148.15 mg/g straw, and the total conversion rate of wheat straw reached 55.57%. At the same time, the researchers also used the wheat straw enzymatic hydrolysate as an inducer to study the effects of culture time, culture humidity and cellobiose concentration on the accumulation of soybean anti-toxin in soybean, and determined that wheat straw oligosaccharide products induced soybean-derived soybeans. The best process conditions for anti-toxins and increased soybean anti-toxin production.
This technology provides a basis for the selection of industrial raw materials for cellooligosaccharide, which can reduce the raw material cost of cellooligosaccharide production; the evaluation of the induced activity of the obtained oligosaccharide product on soybean antitoxin provides a basis for the application of cellooligosaccharide. (Correspondent Wang Yuan)
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