According to <Investigation and analysis of the dairy feed mycotoxin the infection situation> (Ma Meirong) reported: A random sample of 3 different scale dairy feed 32 raw materials and ingredients, use imported ELISA kit for detection of aflatoxins, zearalenone, ochratoxin and vomitoxin etc 4 kinds of common mycotoxin content. The results show that inspection rate of inspected 4 kinds of mycotoxins in all samples is 100%, and contained 2~3 kinds of mycotoxins. Among them, in addition to the meal, alfalfa hay, rice straw, bean curd residue, in almost all the samples of feed zearalenon content exceeded, silage corn exceeding 4 times, the zearalanone content of TMR feed exceeded more than 2 times;

Ochratoxin, ZEN content of Corn by-products GGDS exceed the standard seriously, DON trace or small exceed the standard; Aflatoxins have exceed the standard in the corn silage, straw, bean curd residue, accounting for the total sample of 15.63%.

Hazards of mycotoxins

1、reduce feed nutrition and food intake

Feed mould can change nutrition material ( such as Vitamin, amino acid) content and reduce energy; forage, silage corn contaminated by mould exudes an unpleasant smell, greatly reduced the dry matter intake of dairy cows; some mycotoxins can interfere with normal metabolism of nutrients, such as synthetic T-2 can inhibit the protein toxin.
2、Damage cow reproductive system function, cause reproductive disorders

According to the report, for lactating cows fed 120 ppb (1/1000000000) aflatoxin can reduce the reproduction performance. If  heifers fed the same dose of ZEN, the pregnancy rate will decline by 25%, can lead to reproductive failure in diets containing 750ppb ZEN. Trichothecene can also lead to the abortion of cow. Penicillium rooueforti toxin (PR toxin) produced by Blue cheese mould in silage, suspected of being associated with abortion and retention of afterbirth. Mycotoxins are the important reason to cause cow reproductive disorder.
3、Damage cow gastrointestinal tract, cause intestinal inflammation
　　Research shows that Aspergillus has ability to infect different part of digestive tract of ruminant animals, then cause Intestinal bleeding. Hemorrhagic bowel syndrome（HBS）is the highly lethal intestinal disease of ruminant animal that found in recent years, Some researchers infect mold in dead calf abomasum ulcer lesions that resulted in diarrhea and hematochezia, then use antibacterial medicine cure sick calf, effect is significant. The confirmed reason on HBSwas not clear, but the detection rate of Aspergillus fumigatus lesion was 100%, to be sure that Aspergillus fumigatus is a virulence factor for HBS.

If breed diet with T-2 toxin 0.64ppm for cow, keep 20 days, It can cause bovine blood feces, enteritis, ulcer and death.

4、Damage cow immunity system, reduce body resistance

　Breeding cow feed withT-2 toxin will reduce white blood cell and neutrophil cell number. Trichothecene deoxidation snow rot Fusarium genus alcohol and T-2 toxin reduce immunity system through inhibiting protein synthesis. In addition, test in vitro showed, some mycotoxins has cytotoxicity of lymphocytes

How to choose mycotoxin adsorbent for dairy feed ?

　Healthy, high-quality milk: can only come from healthy cows with good management of large-scale dairy farm.

　And the secretion of average concentration of aflatoxin M1 in milk is 1.7% of aflatoxin B1 in diet, so the higher mycotoxins’ content is, The more damage to the mammary cells are. In addition to the somatic cell count higher, the incidence of mastitis is high.

Aflatoxin will damage liver, inhibit immunity function, increase mastitis, reduce milk production and milk quality reduction of cow;  while ZEN will reduce conception rate of dairy cows; The symptoms of poisoning of aspergillus toxin is to cause feed intake reduction, at the end of decline lactation.  

To control mycotoxins is key to raise cow !

How to choose mycotoxin adsorbent for cow feed ?

An excellent mycotoxin adsorbent should have two conditions：

（1）A wide effect to adsorption of mycotoxins;

（2）To expel mycotoxins out of body, not stay it in body.

　　So far there are three kinds of mycotoxin adsorbent in the market: montmorillonite, the enzyme preparation and yeast cell wall, these three adsorbents have their advantages and disadvantages, but montmorillonite has strong adsorption capacity on aflatoxin and others toxins, not adsorb nutrients, it’s the best performance product among three adsorbents.