Additive premix for reducing heat stress of growing and fattening pigs

Abstract

The present invention discloses an additive premix for reducing heat stress of growing and fattening pigs. The additive premix comprises a carrier and an additive composition, wherein the additive composition comprises 100-1,000 mg / kg of hydrolytic tannic acid, 0.1-10 mg / kg of selenomethionine, 100-500 mg / kg of zinc glycinate, 0.1-10 mg / kg of chromium nicotinate, 100-1,000 mg / kg of vitamin C, 10-500 mg / kg of vitamin E and 10-100 mg / kg of sodium hydrogen carbonate. The invention furthermore provides a use method of an additive. The composition comprises biologically active substances, and the effect of the composition is not simple superposition of the components and is the synergistic effect and the comprehensive effect of the components. The additive premix added with the composition is better in effect than any single component, the consumption of each type of additive is reduced, and the cost is reduced. The additive premix can reduce the material weight ratio and improve the production performance. The intramuscular fat and the water-holding capacity are increased, the shear force and the drip loss are reduced, and the marbling score, the pH value, the tenderness and the chromaticity can be remarkably improved, thus reducing the influence of the heat stress on the meat quality of the growing and fattening pigs.

Description

Technical field [0001] The invention relates to the technical field of feed additive premixes, in particular to an additive premix for reducing heat stress of fattening pigs. Background technique [0002] Heat stress refers to the sum of various non-specific physiological responses of the animal body to heat stimulation in a high temperature environment. Heat stress is common in summer. It can cause a systemic reaction in animals and change various physiological and biochemical functions of animals to affect their production performance and product quality. Pigs are thermostatic animals with imperfect sweat glands, thick subcutaneous fat and poor heat dissipation capacity. They are not good at regulating body temperature through skin evaporation and heat dissipation. Heat stress will occur when the ambient temperature exceeds the upper limit of the pig's thermal neutral zone. [0003] Heat stress will reduce the sow's feed intake and have a huge impact on milk production, affectin...

AI Technical Summary

Problems solved by technology

The impact of heat stress on fattening pigs is manifested in three aspects: First, heat stress affects the integrity and barrier function of the intestinal structure, reduces the activity of digestive enzymes, destroys the balance of the digestive tract flora, and makes pigs digest The absorption function is seriously blocked, and the feed intake and feed conversion rate are reduced, which affects the growth performance of fattening pigs and causes great economic losses. The pH value of the longissimus dorsi muscle after slaughter reduces the fat content in the muscle, reduces the water capacity of the system, and the meat color also deteriorates accordingly, forming PSE meat or yellow fat meat, thereby affecting the quality of pork; third, heat stress will cause the growth and finishing pigs to adjust Changes in the activity of hormones secreted by the hypothalamus-pituitary-adrenaline axis change the metabolism of the body. Among them, the secretion of adrenal cortex hormones increases, the catabolism of the body is strengthened, and the glycogen, protein and fat in the tissue participate in the catabolism in large quantities, so that free fatty acids in the blood At the same time, the intracellular respiratory chain is accelerated, which increases the content of free radicals in the body, leading to lipid peroxidation and oxidative damage, interfering with the balance system of oxidation / antioxidation in cells, resulting in excessive production of free radicals, and further damages the body. Oxidative stress reduces the body's antioxidant defense function

[0004] Heat Stress Causes Severe Economic Losses in the Pig Industry

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