| 摘要 |
A liquid feed supplement for ruminants, suitable for addition to straw or other roughage, comprises an acid solution of urea, possibly accompanied by other sources of non-protein nitrogen such as biuret and ammonium ions, sulphate ions to provide a source of sulphur and contains large, multivalent cations, such as those of magnesium or aluminium, which do not form an insoluble sulphate precipitate. The supplement can be relatively highly concentrated, containing for example between 35% and 65% urea by weight. The presence of the cations in acidic conditions has been found to prevent the crystallisation of the urea which would otherwise tend to occur on cooling. The supplement may also contain cations of trace elements such as zinc, manganese and copper. It may also contain molasses to sweeten the supplement and increase its stickiness. |
