Abdelhamid A M, el-Shinnawy M M, Farrag F H
Department of Animal and Poultry Production, Faculty of Agriculture, University of Mansoura, Egypt.
Arch Tierernahr. 1990 Jul;40(7):637-46. doi: 10.1080/17450399009428412.
The effects of feeding naturally contaminated feedstuffs to sheep were investigated through feeding of contaminated and uncontaminated clover hay, rice straw, and concentrate feed mixture were compared. The highest level of contamination with fungi was observed in the concentrate feed mixture followed by clover hay and rice straw. The most dominant mycotoxin in the contaminated feedstuffs was zearalenone. Contamination resulted in increases of crude protein, ash and silica in feedstuffs while both ether extract and crude fibre decreased. In vivo digestibility of different diet constituents in both contaminated and uncontaminated feedstuffs were determined using four mature Rahmani rams. Contamination resulted in significant increase in the digestibility of dry matter, crude fibre and energy. Contamination affected feed intake of the different feedstuffs particularly the concentrate feed mixture. A metabolism trial was also conducted to study the nitrogen and mineral balance. Retention of nitrogen and calcium was reduced when mouldy feeds were given. On the other hand, magnesium was relatively increased. Blood analysis for sheep at the end of the trials resulted in elevated values of inorganic phosphorus and phospholipid phosphorus and declined total nitrogen, calcium, cholesterol, calcium/phosphorus ratio and cholesterol/calcium ratio due to feeding on mouldy ration. Results of the urine analysis during the metabolism trials proved that mouldy ration increased the estimated values of the concentration of calcium, magnesium and vitamin C; whereas pH values, total nitrogen, ammonia nitrogen and inorganic phosphorus were declined during the feeding on the mouldy ration. Mouldy feeds tested, seemed to have toxic, nephritic and hepatic effect.
通过给绵羊投喂天然受污染的饲料进行研究，比较了投喂受污染和未受污染的三叶草干草、稻草及精饲料混合物的效果。在精饲料混合物中观察到的真菌污染水平最高，其次是三叶草干草和稻草。受污染饲料中最主要的霉菌毒素是玉米赤霉烯酮。污染导致饲料中粗蛋白、灰分和二氧化硅增加，而乙醚提取物和粗纤维减少。使用四只成年拉赫曼尼公羊测定了受污染和未受污染饲料中不同日粮成分的体内消化率。污染导致干物质、粗纤维和能量的消化率显著提高。污染影响了不同饲料的采食量，尤其是精饲料混合物。还进行了一项代谢试验以研究氮和矿物质平衡。投喂发霉饲料时，氮和钙的保留量减少。另一方面，镁的含量相对增加。试验结束时对绵羊进行的血液分析显示，由于投喂发霉日粮，无机磷和磷脂磷的值升高，而总氮、钙、胆固醇、钙/磷比值和胆固醇/钙比值下降。代谢试验期间的尿液分析结果证明，发霉日粮增加了钙、镁和维生素C浓度的估计值；而在投喂发霉日粮期间，pH值、总氮、氨氮和无机磷下降。所测试的发霉饲料似乎具有毒性、肾毒性和肝毒性作用。
