Utilization of Nonprotein Nitrogen in Rations of Milking Cows under Hawaiian Conditions

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Abstract
Almost all of the protein feeds used in the Hawaiian Islands for animal feeding are imported. Protein feeds are expensive and their storage life is limited. Carbonaceous feeds in the form of sugar cane molasses and pineapple bran are adequate in the Islands. Because of the relative cheapness of non-protein nitrogenous substances in the diet of ruminants, their use is a matter of great economic importance in a protein deficit area like Hawaii. Holstein-Friesian cows in different stages of lactation were used to measure the value of urea and ammoniated salts as a partial replacement for high protein feeds in the ration. Results of the study showed that efficient utilization of urea and ammoniated salts is possible under a self-feeding regime.