Since the reform and opening up, China's aquaculture industry has developed rapidly. At present, China has become a major producer of feed industry, with an annual output of about 70 million tons of feed. With the improvement of people's living standards and the strengthening of health awareness, people have a deeper understanding of "sickness from the mouth". The people are concerned about the problem of eating more than eating, and thus raising the food. Requirements. In recent years, safe, green foods with no pollution, no residue and no pollution have become a fashion fashion, and the problem of residual residues of harmful substances has also caused people's high vigilance. Feed additives are one of the main causes of harmful substances. Therefore, in recent years, the research and production boom of pollution-free feed additives has been set up in China's feed industry. It has the ability to prevent disease and disease, and can greatly improve the production and quality of culture. The development and application of new, high-efficiency and pollution-free feed additives will bring China's feed technology level and aquaculture industry to a new level.
As a new type of oligosaccharide additive, oligosaccharide polyglycan is one of the best products of oligosaccharide species with the best function of proliferating bifidobacteria, inhibiting the growth of pathogenic bacteria and spoilage substances, and purifying the intestinal tract. This paper discusses the characteristics of xylooligosaccharides and their application in laying hens, and provides reference for the use of xylooligosaccharides in laying hens.
Characteristics of xylooligosaccharides
Xylo~oligosaccharides (XOS), a novel oligosaccharide additive, is extracted from 2 to 7 xylose and β~1,4 glycosides from natural plants rich in xylan. A general term for low-grade polymeric sugars that are joined by bonds.
Good stability Low Xylose has extremely high biochemical stability, and it is difficult to decompose it by various digestive juices in animals. It does not decompose at a high temperature of 120 ° C ~ 150 ° C, and can withstand almost all feed processing conditions. The quality did not change when the pH was 2.5 to 8.0. In vitro digestion tests showed that the digestibility of gastric juice, pancreatic juice and small intestinal mucosal enzyme solution were 99.9%, 99.8% and 99.6%, respectively. It can be stored stably under various climatic conditions without deterioration.
The biological potency of xylose has a high biological potency, and its addition amount is only 1/15 of the oligo-isomaltose widely used in the current feed, and 1/5 of the oligofructose.
No incompatibility The xylooligosaccharide has no effect on the various ingredients in the feed and is not affected by the ingredients in the feed.
Application report of xylooligosaccharide in laying hens feed
Effect of xylooligosaccharide on laying performance, egg quality and serum biochemical parameters of Hailan laying hen Zheng Xuebin found that the effect of xylooligosaccharide on production performance, biochemical index and egg quality of laying hens. The experiment showed that the average egg production rate and feed-to-egg ratio of the second group were significantly better than the control group (P<0.05); the alanine aminotransferase activities of the second and third groups were 25.00% lower than the control group (P<0.05). 22.92% (P<0.05); the total cholesterol content was 30.82% (P<0.05) and 28.77% (P<0.05), respectively. In terms of egg quality, the cholesterol content in the second and third groups was higher than that of the control. The group decreased by 20.66% (P<0.01) and 26.42% (P<0.01), the difference was extremely significant. The protein content in eggs was 10.07% higher than that of the control group (P<0.05) and 10.79% (P<0.05), the difference was significant. . In combination with various indicators, the effect of the second group of experiments with 0.01% xylooligosaccharide was the best.
The effect of xylooligosaccharide on the performance of laying hens Dang Guohua found that the effect of xylooligosaccharide on the performance of laying hens. The results showed that the addition of 0.015% and 0.02% xylooligosaccharides in the diet significantly increased the average daily egg production rate, egg production weight and feed conversion ratio of the laying hens (P<0.01); the diet added 0.02% low. Xylose can significantly increase the eggshell strength, eggshell thickness and eggshell rate of the eggs (P<0.01).
Du Wenxing found that 0.015% xylooligosaccharide is the best dosage, which can significantly improve the laying rate of laying hens, the rate of increase is about 6.85%; the ratio of egg to egg is reduced by 6.45%; the percentage of egg yolk to the whole egg is 3.27 higher than that of the control group. %, the thickness of the eggshell was 4.65% lower than that of the control group, and the decrease was significant. At the same time, there was no effect on the quality of the eggs; the gross profit increased by 23.9%.
The effect of xylooligosaccharides and synbiotics on the performance of laying hens Jiang Zhengyu found that the average egg production rate of laying hens in each experimental group increased by 4.09%, 6.81%, 3.71% and 4.85%, respectively, and the average egg quality increased by 1.79% and 3.02, respectively. %, 2.41% and 1.28%, the average daily egg production increased by 6.79%, 10.63%, 6.04% and 6.70%, respectively, and the egg-to-egg ratio decreased by 6.25%, 9.38%, 5.47% and 6.25%, respectively. In combination with various indicators, the addition effect of adding 0.01% xylooligosaccharide + 0.005% probiotics is the best.
Summary
The chicken industry is one of the pillar industries in China's rural areas and agriculture. Due to the high density of chickens in chicken farms, poor ventilation and light conditions, foul smell of feces and serious air pollution, resulting in indigestion of the flocks, loss of appetite, and easy spread of various diseases. This not only affects the feed utilization rate, meat production rate and egg rate, but also greatly increases the cost of chicken medicine, which seriously affects product quality.
Adding a certain amount of xylooligosaccharide to the feed can improve the laying rate of laying hens to a certain extent, reduce the ratio of eggs to eggs, improve the color and quality of eggs, improve the maintenance and management environment, and have good social and economic benefits. In addition, xylooligosaccharide is a natural feed additive with the advantages of no pollution and no residue. Therefore, in the future feed industry, xylooligosaccharide as an excellent green additive has broad application prospects.
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