結(jié)論:植物提取物和酶制劑對飼喂小麥日糧的肉雞有不同方面的效果。日糧中添加植物提取物和酶制劑可以改善肉雞的生產(chǎn)性能,其作用機(jī)制可能是:由于小麥日糧含有較高的可溶性木聚糖導(dǎo)致腸道粘度增加從而導(dǎo)致腸道微生物快速繁殖,結(jié)果導(dǎo)致肉雞生長緩慢。植物提取物添加劑可以有效殺滅病菌減少細(xì)菌發(fā)酵,提高腸道蛋白酶的活性從而提高營養(yǎng)素消化率,而酶制劑(木聚糖酶)可以降解木聚糖和減少食糜粘度。植物提取物和酶制劑(木聚糖酶)一起使用起到相輔相成的效果。
作者:H. B. MALAYOGLU, S. BAYSAL, Z. MISIRLIOGLU, M. POLAT,H. YILMAZ AND N. TURAN, Ege University and Istanbul University, Turkey
詳細(xì)內(nèi)容下載:http://www.meriden.com.cn/Simpli ... D=450&SortID=25作者: 畜牧飼料小兵 時間: 2010-6-7 01:57 回復(fù) 22#cuizhigang_b
FDA calls for 'phase out' of antimicrobial use for growth promotion
AVMA applauds agency's acknowledgment of veterinarian's role
Jun 29, 2010
DVM NEWSMAGAZINE
Rockville, Md. -- The Food and Drug Administration (FDA) proposes to phase out antibiotic use in food animals unless there is medical necessity.
The proposed guidance was issued June 28 by FDA, and calls for a phase out of antimicrobial use for growth promotion in food animals. The document reiterates the benefits of therapeutic uses of antibiotics in food animals as means of protecting animal health and safeguarding human health.
“The American Veterinary Medical Association (AVMA) is pleased that the FDA is committed to working with the veterinary profession to address antimicrobial resistance concerns,” Dr. Ron DeHaven, AVMA’s chief executive officer states in the association’s statement on the proposed rules. “Veterinarians are essential to any discussion regarding the importance of disease control and prevention. We look forward to reviewing and commenting on the draft guidance.”
The FDA guidance document is open to public comment for the next 60 days.
In March, AVMA representatives lobbied lawmakers against passage of broad antibiotic bans currently under review at the federal level, like the Preservation of Antibiotics for Medical Treatment Act (PAMTA).
FDA’s new guidance document acknowledges the veterinary profession's efforts in calling for judicious use of antimicrobial drugs as a method to stave off antimicrobial resistance, but states that “additional steps are needed.”
The draft document proposes to limit antimicrobial use in food animals unless such drugs are medically necessary and administered by oversight or in consultation with a veterinarian, FDA reports.
“Using medically important antimicrobial drugs as judiciously as possible is key to minimizing resistance development and preserving the effectiveness of these drugs as therapies for humans and animals,” says Bernadette Dunham, DVM, PhD, director of FDA’s Center for Veterinary Medicine. “FDA is committed to working with animal drug sponsors, the veterinary and public health communities, the animal agriculture community, and all other interested stakeholders in developing a practical strategy to address antimicrobial resistance concerns that is protective of both human and animal health.”