As the name suggests, these are lick blocks containing urea, molasses, vitamins, minerals and other multinutrients. The
feeding of the blocks is a convenient and inexpensive method of providing a range of nutrients required by both the rumen microbes and the animal,
which may be deficient in the diet. The main justification for using the blocks depends on their convenience for packaging, storage, transport
and ease of feeding. The ingredients are designed to provide a wide rage of nutrients to cover all potential deficiencies. In the wet tropical
regions minerals are often deficient in cut and carry grass or crop residue feeding systems. Grasses from road sides or wastelands are particularly
low in minerals as generally, no fertilizer is used and the grasses have often been cut for decades for ruminant production, thus depleting the
reserves of both soils and plants.
- Development and field evaluation of animal feed supplementation packages [pdf]. Proceedings of the final
review meeting of an IAEA Technical Co-operation Regional AFRA Project organized by the Joint FAO/IAEA Division of Nuclear Techniques in Food
and Agriculture and held in Cairo, Egypt, 25-29 November 2000.