Baran M, Boda K
Arch Tierernahr. 1982 Mar;32(3):199-207. doi: 10.1080/17450398209425133.
In experiments with 5 rams it was investigated whether it is possible to use pulverised polyethylene for measuring the passage rate of the feed through the digestive tract. Polyethylene of a particle diameter of 0.4 mm and the specific weight of 0.924 represented 1.78 and 3.56% of the pelleted diet, which contained 41.8% meadow hay, 25.3% barley, 15.4% beech sawdust, 15% molasses, 1.3% urea, 1.2% mixture of vitamins and minerals. After the single polyethylene application to 3 sheep the quota of its recovery in faeces was 68.9-74.4-87.4%. During the continuous polyethylene application over 8 days 64.8% was rediscovered, after the end of the application 80.25% (12th day). The best results in the quota of recovery were achieved after the application of the continuous daily ration with 25 g polyethylene per fistula during the feeding of a ground feed ration with additionally long hay. In this case the quota of the recovery of polyethylene was between 93.2 and 98.9%. The low quota of the recovery of polyethylene was probably caused by retention in the rumen and the large intestine, which was corroborated by the pathologic-anatomic dissection one month after the end of the experiment. Possibly there is a different explanation for the low quotas of recovery both in the size and the shape of the polyethylene particles and in the method of determination and the method of application.
在对5只公羊进行的实验中，研究了是否可以使用粉碎的聚乙烯来测量饲料通过消化道的通过率。粒径为0.4毫米、比重为0.924的聚乙烯占颗粒饲料的1.78%和3.56%，该颗粒饲料包含41.8%的草地干草、25.3%的大麦、15.4%的山毛榉锯末、15%的糖蜜、1.3%的尿素、1.2%的维生素和矿物质混合物。在给3只绵羊单次施用聚乙烯后，其在粪便中的回收率为68.9 - 74.4 - 87.4%。在连续8天施用聚乙烯的过程中，回收率为64.8%，施用结束后（第12天）为80.25%。在给基础饲料日粮并额外添加长干草的饲养过程中，通过瘘管每天连续施用25克聚乙烯，回收率取得了最佳结果。在这种情况下，聚乙烯的回收率在93.2%至98.9%之间。聚乙烯回收率低可能是由于其在瘤胃和大肠中的滞留，实验结束一个月后的病理解剖证实了这一点。对于回收率低的情况，可能存在不同的解释，这既与聚乙烯颗粒的大小和形状有关，也与测定方法和施用方法有关。
