Vitamin C, also known as L-ascorbic acid, is a sugarless derivative that is colorless, odorless, slightly acidic, and easily soluble in water. It is an essential nutrient for animal organisms and plays an important role in promoting animal performance and enhancing disease resistance. Studies have found that most aquatic animals do not self-synthesize or synthesize VC, and must be taken from food. Although most mammalian livestock and poultry can synthesize VC in the liver or kidney, when the livestock are under high temperature, transportation, transfer and other stress conditions and in the early stages, the addition of VC can stabilize and improve its production performance.
Application effect of VC in culture
1, the application of VC in production
The addition of VC to chicken diets has a good effect on improving egg production rate, eggshell quality, feed utilization and weight gain, and fertilization hatching rate of breeders. Especially in the high temperature, water cut, fasting, immunization, disease, parasitic infection, malnutrition, poor ventilation, frightened, dense feeding or transportation and other stress states, the effect of adding VC is significant. Li Changzhong (1997) found that the addition of coated vitamin C 100 mg/kg and 200 mg/kg to the diet of laying hens can increase the average egg production rate of parents of 25-30 weeks old breeders by 2.26% and 3.03%, and hatching of fertilized eggs. The rate increased by 1.69% and 3.54%. Sun Yanming et al. (1997) gave 200-week-old Hailan commercial hens 200 mg/kg VC by drinking water. The egg production rate increased by 9.16% and the feed remuneration increased by 3.32%. Pardne et al. (1985) found that broilers fed VC had a reduction in heat stress (43 ° C) from 22% to 7.2%, while significantly increasing broiler weight gain. It shows that the addition of VC can improve the disease resistance and anti-stress response of chickens, and at the same time promote the full play of production performance.
The addition of VC to pig production also plays a good role in promoting the performance of pig production. The study found that adding 200 mg/kg of coated vitamin C to the 30-90 kg Du Changda pig diet increased the daily weight gain of pigs by 5.68%, and the feed compensation increased by 6.8%; adding 75 to the piglet diet. 150mg/kg VC can increase daily gain by 7.5% and 5.8%, feed compensation by 3.7% and 3.5%; adding 1gVC to sow's labored diet, the average litter size increased by 0.65, live litter rate increased by 5.5% . In addition, studies have found that adding VC to the diet can reduce the incidence of diarrhea in piglets; adding 500-1000 mg/kg of VC to boar feed can improve the quality and quantity of semen, thereby increasing the conception rate and production of sows. Aberdeen rate.
2, the application of VC in aquaculture
The addition of VC to aquaculture can improve the anti-stress and disease resistance of aquatic animals, and has obvious effects on promoting growth, promoting bone development, and increasing reproductive rate. Adding VC to the bait can enhance the immune function of aquatic animals, thereby increasing their disease resistance. With the increase of VC addition in feed, the weight gain rate and survival rate of rainbow trout increased, and the survival rate of rainbow trout infected with Vibrio anguillarum (injected or soaked) also increased with the increase of VC intake (Navarre et al., 1989). VC can improve the ability of aquatic organisms to adapt to hypoxia and low temperature. The addition of a certain amount of VC to the bait of P. vannamei can significantly improve its resistance to ammonia nitrogen environment. Three gradients of VC were added to the rainbow trout feed, and the tolerance of dissolved oxygen oversaturation and dissolved oxygen deficiency in the high dose group of rainbow trout was found to be enhanced. VC also mitigates the toxic effects of heavy metals and promotes healing of aquatic animals. Wahli et al found that VC can significantly improve the recovery ability of rainbow trout. In addition, the growth-promoting effect of VC on aquatic animals is quite obvious. Wang Anli and other studies have shown that VC has a significant effect on growth and survival of Chinese shrimp. VC has an important influence on the reproductive performance of fish. Ciereszko (1995) found that the sperm concentration and vigor of rainbow trout were related to the concentration of VC in semen. The VC in the feed showed a positive effect when the VC was 130-270 mg/kg; the survival rate of the embryo decreased when the VC concentration in the semen was <7.3 μg/mL. . The egg weight and egg production of female rainbow trout increased with increasing VC intake and ovarian VC concentration (Blom, 1995).
Wall Mounted Shower Arm,Shower Wall Arm,Fixed Shower Arm Fitting,Wall Mounted Shower Arm Fitting
Moon Shower Sanitaryware Co.,Ltd , https://www.moonshowerglobal.com