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Ruminant Nutrition and Forage Utilization
Asian-Australasian Journal of Animal Sciences 1990;3(1): 39-46.
DOI: https://doi.org/10.5713/ajas.1990.39    Published online March 1, 1990.
Effects of blood-mixed and heat treatment of protein feeds on nitrogen digestion in the rumen and hindgut of sheep
C. S. Yoon, N. H. Lee, K. K. Jung
Abstract
This experiment was conducted to study the effects of blood-mixed and heat-treated protein feeds on protein degradation in the rumen, flow of protein to the abomasums and availability of undegraded protein in the intestine of sheep in a 4횞4 Latin square design. Soybean oil meal, rapeseed meal, and whole soybean were mixed with fresh swine blood and dried at 140째C for 2 h. Proportionate disappearance of apparently digested OM in the postrumen for the blood and heat treated protein group was ranged from 43.2 to 50.5% as compared with 28.0% for the unheated soybean oil meal diet. The treated protein supplements were resulted in greater total N and NAN flow passing at the abomasums than untreated soybean oil meal diet was fed. The quantities of undegraded feed N passing at the abomasums for the treated protein diets was approximately twice as high as that of the untreated soybean oil meal diet and the estimated amount of undegraded N of the protein supplement itself was 79.1 to 84.2% as compared with 15% of soybean oil meal.
Keywords: Blood and Heat Treatment; Protein Degradation; Microbial N Synthesis; Sheep


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