Unsworth E F, Pearce J, McMurray C H, Moss B W, Gordon F J, Rice D
Food and Agricultural Chemistry Research Division, Department of Agriculture, Belfast, United Kingdom.
Sci Total Environ. 1989 Sep;85:339-47. doi: 10.1016/0048-9697(89)90333-1.
Two experiments were performed with lactating dairy cattle to assess the efficacy of clay minerals and Prussian Blue (AFCF form) in controlling the transfer of dietary radiocaesium to milk. In Experiment 1, bentonite was included in the diet at 0, 300, 600 and 900 g d-1 and the transfer of radiocaesium from silage to milk was determined. Bentonite inclusion significantly (P less than 0.001) depressed the transfer of radiocaesium to milk with no benefit in increasing the dietary inclusion above 600 g d-1 when a 73% reduction was observed. In Experiment 2, the effectiveness of bentonite (300 g d-1), clinoptilolite (300 g d-1) and Prussian Blue (3 g d-1) as dietary additives was compared. All treatments significantly (P less than 0.001) depressed the transfer of dietary radiocaesium to milk. Clinoptilolite was less effective than bentonite and both treatments were considerably less effective than Prussian Blue, the reductions being 35%, 62% and 85% respectively.
用泌乳奶牛进行了两项试验，以评估粘土矿物和普鲁士蓝（AFCF形式）在控制日粮放射性铯向牛奶转移方面的效果。在试验1中，日粮中膨润土的添加量分别为0、300、600和900克/天，并测定了放射性铯从青贮饲料向牛奶的转移情况。添加膨润土显著（P小于0.001）降低了放射性铯向牛奶的转移，当观察到降低73%时，日粮中添加量超过600克/天并无益处。在试验2中，比较了膨润土（300克/天）、斜发沸石（300克/天）和普鲁士蓝（3克/天）作为日粮添加剂的效果。所有处理均显著（P小于0.001）降低了日粮放射性铯向牛奶的转移。斜发沸石的效果不如膨润土，且两种处理的效果均远不如普鲁士蓝，降低率分别为35%、62%和85%。
