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Assunic acid is a commonly used organic arsenic preparation. Its chemical name is p-aminobenzoic acid, which can promote growth, improve feed utilization, increase egg production, enhance skin and egg yolk pigmentation, and inhibit coccidiosis eggs and mycoplasma, and resist large intestine. Bacillus and control diarrhea and other effects. Adding asparagic acid in the summer diet can effectively relieve heat stress and have a significant effect on improving chicken egg production performance. The recommended additive amount is 60 mg/kg.
Zinc Bacitracin
Bacitracin Zinc is a polypeptide antibiotic produced by Bacillus licheniformis and is resistant to gram-positive bacteria. It has the property of improving feed efficiency and promoting growth, and is a feed additive that alleviates heat stress in laying hens. The zinc-encapsulated bacillus peptide zinc is recommended to be added in an amount of 100 mg/kg.
Enzyme
An enzyme is a catalytic protein produced by living cells that catalyzes all metabolic processes in plants and animals. During the hot season, the addition of phytase to chicken feed increases the tolerance to high temperature environment due to the increased utilization of phosphorus, which results in a significant improvement in broiler growth and laying hens egg production performance.
Flavomycin
The antibacterial effect of flavomycin is strong, and it promotes the growth of beneficial microorganisms, hinders the proliferation of harmful bacteria, maintains the balance of intestinal flora, and at the same time reduces the thickness of the intestinal wall, promotes the absorption of nutrients, improves the feed conversion rate, and promotes animals. Grow. Because of the need to reduce the maintenance of the chicken body during the high temperature season and the loss of appetite, the increase in feed conversion rate and the absorption of nutrients will help prevent the decline in immune function. The recommended dose of flavomycin in broiler chicken diets is 5 mg/kg.
Acidifying agent
The frequency of chicken respiration increased during heat stress, CO2 and HCO3- levels in the blood decreased, pH increased, respiratory alkalosis may occur. Acidifiers are added to the feed to reduce the elevated pH and to adjust the acid-base balance, thereby avoiding or relieving the stress caused by heat. Under heat stress, 0.25% citric acid, 0.25% potassium chloride, and 0.5% sodium bicarbonate were added to the broiler diets, respectively, and the daily gains increased by 8.42%, 7.17%, and 8.85%, respectively. 0.1% fumaric acid was added to the feed, and 0.63% ammonium chloride was added to the drinking water to prevent summer heat from stressing the broilers. The broilers were still quiet at high temperatures, with little disturbance, and the number of hot wheezing decreased.
Betaine
The study found that betaine is a high-efficiency methyl donor and also a permeation balance material. It can replace part of methionine in broilers, reduce feed costs, protect intestinal nutrient absorption function, increase feed conversion rate in harsh environments, and partially resist coccidiosis. The drugs have a synergistic effect and can enhance the efficacy of anticoccidial drugs.
Herbal additives
Chinese herbal medicine is rich in nutrients such as vitamins, minerals, trace elements, and amino acids. Many studies have shown that the addition of certain herbal medicines that are detoxifying, bactericidal, and disease-resistant can reduce and eliminate the harm of heat stress to chickens. Qingshu Powder (composed of musk, honeysuckle, Radix, Atractylodes, Gentiana, etc.) is used to remove heat, detoxify, sterilize, and invigorate the spleen and dampness. The powder is added in the diet in a 1% ratio to feed layers. In the hot season, the feed remuneration can be increased by 5.45% to 13.20%, and the egg production rate can be increased by 9.37% to 11.29% (P < 0.01). In the summer heat-stressed egg breeder diets, 0.1% Chinese medicine Acanthopanax extract was added to increase the egg production rate by 10.2% (P<0.01), and soft shell eggs by 18.5% (P<0.01). The chicken mortality rate was eliminated. With a decrease of 10.3%, the fertilization rate of eggs increased by 17.58%, and the hatching rate of breeding eggs increased by 17.76%, indicating that Acanthopanax extract has good heat stress resistance on egg breeders.
Asparagic acid