Types And Applications Of Feed Anti-fungal Agents
Benzoic acid and sodium benzoate: Both benzoic acid and sodium benzoate can non-selectively inhibit the activity of microbial cell respiratory enzymes, hinder the metabolism of microorganisms, thereby effectively inhibiting the growth and reproduction of various microorganisms, and for the growth of animals. There was no adverse effect on reproduction. The use of sodium benzoate in feeds generally does not exceed 0.1%.
Propionic acid and its salts: Propionic acid is a corrosive organic acid, a colorless, transparent liquid that is readily soluble in water. Propionates include sodium propionate, calcium propionate, potassium propionate, and ammonium propionate. Propionic acid and propionate are all acid antifungal agents, have a broad spectrum of antibacterial activity, have certain inhibitory effects on mold, fungi, yeast, etc., and their toxicity is very low, which is an intermediate product of normal metabolism of animals. It can be used as an animal and is the most commonly used anti-mold agent in feed.
Fumaric acid and its esters: Fumarate includes dimethyl fumarate, diethyl fumarate and dibutyl fumarate. Among them, dimethyl fumarate is better. . Fumaric acid and its esters are also acid antifungal agents, which have a broad antibacterial spectrum and can improve the taste of feed and improve feed utilization. The general use amount is about 0.2%.
Dehydroacetic acid: dehydroacetic acid is a high-efficiency broad-spectrum antibacterial agent with strong inhibition of bacteria, mold and yeast development, especially for mold, and has certain antibacterial properties under acid and alkali conditions. effect. Dehydroacetic acid is a low-toxic and anti-mold agent, generally has no adverse effects, and the dosage is about 0.05%.
Parabens: Strongest against molds and yeasts. When parabens coexist with starch, their effects will be affected, so be careful when using them.
Compound mold inhibitor: refers to the combination of two or more different mold inhibitors. For example, the US-made mold is made up of propionic acid, acetic acid, benzoic acid, sorbic acid and the like. The compound anti-fungal agent has wide antibacterial spectrum, wide application range, good anti-mildew effect, small dosage and convenient use, and is a commonly used anti-mold agent in feed.
2. Reasonable application of feed anti-fungal agent
The correct choice of anti-fungal agent: the use of anti-mold agent in the feed must ensure that under the premise of effective dose, it can not lead to acute and chronic poisoning of animals and drug-limited residue; there should be no adverse effects such as carcinogenic, teratogenic and mutagenic; The fungicide also does not affect the original taste and palatability of the feed. For example, organic acids such as acetic acid and propionic acid are highly volatile and easily affect the taste of the feed. Therefore, the use of salts or esters may be better. The ideal anti-mold agent should also have the characteristics of wide antibacterial range, strong anti-mildew ability, easy mixing with feed, economical and practical. Under normal circumstances, propionate and some compound anti-fungal agents are the first considerations, such as Lubao fine salt, Kejiba, Wanxiangbao and other products are economical and practical, quality and effect are guaranteed.
Flexible use of anti-mold agents according to actual conditions such as moisture content: There are many factors affecting the effect of anti-fungal agents, such as the solubility of anti-mold agents, the pH of feed, moisture content, temperature, sugar and salt content in feed, feed pollution The degree, etc., but mainly depends on the season and moisture content to determine whether to use and specific dosage. Therefore, in the dry and cool seasons such as autumn and winter, the feed moisture is below 11%, generally do not need to use anti-fungal agents; and when the moisture is above 12%, anti-fungal agents should be used, and the moisture in the feed is high and the high-temperature and high-humidity season is still The amount of anti-fungal agent should be increased to ensure good anti-mildew effect.
The anti-mold agent is used in combination with the antioxidant: the moldy process of the feed is accompanied by the oxidation of the nutrients in the feed. Generally, the anti-mold agent should be used together with the antioxidant to form a complete anti-mold and anti-oxidation system, so as to effectively ensure Extend the storage period.