Improve production performance
The main function of enzyme in feed is to increase the proportion of digestive nutrients in feed and increase the utilization rate of feed. Animal feed is mainly divided into grain and meal, and the presence of plant cell wall affects nutrient digestion and absorption. Naturally secreted enzymes such as pigs and poultry cannot break down the cell walls, so it is only in the feed that the corresponding enzymes are added to degrade them. Grains such as corn, barley and wheat bran, cake and other agricultural and sideline products, by adding cellulose enzyme, hemicellulase and pectinase, under the synergy of several groups of the enzyme to destroy the plant cell walls, make its become soft, prompted the cell wall and cell contents in animal gastrointestinal digestion and absorption, to improve feed utilization rate. Xylanase is widely used in poultry diet. Studies have shown that xylanase can effectively promote the absorption and digestion of feed nutrients and improve the performance of poultry production. Xu jun et al. reported that the addition of xylanase 0.05% increased the weight of the experimental group, while the weight ratio decreased.
Eliminate anti - nutrition factors and promote the growth of animals.
Anti - trophic factor has anti - nutrition effect, and different feed ingredients have different anti - nutrition factors. The antitrophic factors can be used to prevent nutrient absorption by combining nutrients with nutrients in the gastrointestinal tract of livestock and poultry. And antinutritional factors in direct inhibition of digestion, absorption of nutrients has the promoting effect of endogenous enzymes, feed the hemicellulose and pectin dissolve in water after will produce viscous solution, increased gastrointestinal contents of viscosity, which nutrients and endogenous enzymes was difficult to spread, to shorten the time of the feed through the intestine, affect the digestion and absorption of the animal. Under the synergy of compound enzyme, can be cellulose, pectin and glycoprotein degradation of monosaccharide and oligosaccharide, reducing the viscosity of intestinal contents, reduces this kind of material used for digestion, increase the digestion and absorption of nutrients. It is reported that the addition of enzyme preparation in feed can activate the secretion of endogenous enzyme, thus improving the digestibility of feed and promoting the growth of animals. The addition of xylanase also promotes the digestion of fiber in the rumen of ruminants. Chun-sheng gao, etc, on the basis of the grass carp feed xylanase is added 0.05% 0.2%, the results found that grass carp weight gain rate increase, bait coefficient decreased, dry matter, crude protein, crude fat and crude fiber digestion rate increase.
Broaden feed sources
Crop straws produce about two to three billion tons of crop per year in the world. Our country is an agricultural country, crop straw resource is very rich, crop straw in about 65% - 65% of the dry matter to be able to provide energy to the animal, and used as feed for less than 10% at present, most of the crops straw returning directly or used as a fuel, still is cause resource waste and environmental pollution. Besides a few plant-eating animals such as cows can digest cellulose of straw, other animals can't use this part of the energy, and as a result of the existence of cellulose, it will affect the digestion of other nutrients, thus reducing feed nutritional value. Cellulase is the floorboard of the class of cellulolytic enzyme and its main effect is the degradation of livestock and poultry NSP in the digestive tract and reduce the intestinal contents viscosity, promote nutrient absorption, reduce livestock diarrhea, so as to promote animal growth and improve the feed utilization rate. There are many NSP in agricultural straw, mainly including arabidopsis, glucan, galactose, pectin, cellulose, etc. Because a single stomach animal cannot decompose NSP, it becomes an anti-nutrient factor. The enzyme preparation can eliminate the anti - nutrition factor, improve the utilization rate of feed and save feed resources.
Improve the vitality of animal pups.
In recent years, due to the low survival rate and slow growth rate of farmers, the number of family farming has gradually decreased, and it is very difficult to promote the production mode of enterprises and farmers. The application of enzyme in feed can improve the digestion of poultry and the development of immune organs, regulate the level of blood metabolism hormone, and finally improve the production performance and survival rate of poultry. Adding xylanase to the wheat basal diet increases the relative weight of the spleen, thymus and bursa of broilers, and the death rate decreases by 60%. Shi baojun et al. found that adding xylanase to wheat basal diet could increase the daily weight gain of meat chicken by 2.38%, and the material weight ratio decreased by 6.91% and the survival rate increased by 6.47%.