Application of Pectinase in Animal Feed

Currently, the pectinase enzyme commonly used in animal feed is acidic pectinase, mostly produced by black Aspergillus fermentation. The optimal temperature for this enzyme is 40℃ to 50℃, and the optimal pH range is 3.0 to 4.0. It has good acid resistance and strong activity under animal body temperature. Alkaline pectinase enzyme is less used in feed because its optimal pH value does not match the pH value of animal gastrointestinal tract.

When adding pectinase enzyme to feed, its main functions are reflected in the following aspects

Breaking down plant cell walls and promoting the release of nutrients;

Reducing food viscosity and increasing digestive enzyme activity;

Increasing the interaction time between digestive enzymes and nutrients, promoting the digestion and absorption of nutrients, and improving the nutritional value of feed.

Studies have shown that pectinase enzyme can prevent the decline of chicken production caused by pectin. Adding pectinase can improve the production performance of broilers. Pectinases can significantly increase the weight gain of chicks during the entire period, reduce feed conversion ratio, and improve the digestion rates of dry matter, crude protein, organic matter, and crude fiber by 11.0% to 22.5%.

Pectin, cellulose, hemicellulose, and a small amount of extensin protein jointly constitute the plant cell wall structure. To completely break down plant cell walls and release nutrients, it requires the joint action of pectinase enzyme, cellulase products, hemicellulase, and protease. Adding pectinase and cellulase in high-fiber diets can improve the growth performance, slaughter performance, and meat quality of Wulong geese. Adding 10,000U/kg pectinase in high-fiber diets can improve the growth performance and slaughter performance of Wulong geese, and the effect is better when combined with 40,000U/kg cellulase.

Issues and Prospects of Pectinase Enzyme Application

The current research hotspots of feed enzymes are digestive enzymes such as protease, lipase, and non-starch polysaccharide enzymes such as xylanase and cellulase, but pectinase enzyme research and application in feed have not received much attention. Most of the pectinase used in feed comes from black Aspergillus, and it is mainly produced by liquid fermentation with a low yield. There are no national or industry standards for pectinase enzyme in feed, and the enzyme activity detection standards of different companies are inconsistent. Corn-soybean meal type feed is the most widely used feed. The fruit pectin content in plant protein feed such as cake meal is very high, and the anti-nutritional effect of pectin on protein digestion and absorption in feed is particularly prominent. Adding pectinase enzyme to feed can significantly improve the breakdown of plant cell walls, release nutrients, and increase nutrient utilization. Developing and researching pectinase enzyme has important theoretical significance and application value for improving the utilization of plant protein feed and saving feed.

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