Peterson B J, Ely D G, Boling J A
Int J Vitam Nutr Res. 1975;45(3):349-56.
Diets containing expeller-extracted linseed meal treated with corn oil, lard or coconut oil were fed to lambs to determine the effectiveness of coating the protein in reducing its ruminal degradation. Three common indicators of nitrogen metabolism in the ruminant were used in evaluation: ruminal ammonia, blood plasma ammonia and plasma urea. Eight crossbred lambs, averaging 27 kg in weight, were allotted to the four diets which were fed at a rate of 350 g at 12-hour intervals. Ruminal ammonia, plasma ammonia and plasma urea were monitored at 0, 2, 4, 6 and 8 hr after feeding. Lambs consuming coconut oil-treated linseed meal produced less rumen ammonia (average of .5 mg/100 ml across all collection times) than those fed normal linseed meal (10.3 mg/100 ml). Lambs fed corn oil-treated and lard-treated linseed meal had ruminal ammonia levels intermediate to those fed normal and coconut oil-treated linseed meal. Levels of plasma ammonia and plasma urea nitrogen of normal linseed meal were significantly higher than the same measures with the oil-treated linseed meals. Differences in plasma ammonia and urea nitrogen were not significant among the three oil-treated diets.
将用玉米油、猪油或椰子油处理过的压榨提取亚麻籽粕日粮喂给羔羊，以确定包裹蛋白质对降低其瘤胃降解率的效果。反刍动物氮代谢的三个常见指标用于评估：瘤胃氨、血浆氨和血浆尿素。八只平均体重27公斤的杂交羔羊被分配到四种日粮中，日粮以350克的量每12小时间隔投喂一次。在喂食后0、2、4、6和8小时监测瘤胃氨、血浆氨和血浆尿素。食用椰子油处理亚麻籽粕的羔羊产生的瘤胃氨（所有收集时间的平均值为0.5毫克/100毫升）比喂食普通亚麻籽粕的羔羊（10.3毫克/100毫升）少。喂食玉米油处理和猪油处理亚麻籽粕的羔羊瘤胃氨水平介于喂食普通亚麻籽粕和椰子油处理亚麻籽粕的羔羊之间。普通亚麻籽粕的血浆氨和血浆尿素氮水平显著高于油处理亚麻籽粕的相同指标。三种油处理日粮之间的血浆氨和尿素氮差异不显著。
