Publication Date
1985
Location
Kyoto Japan
Description
In order to investigate the protein digestibility of heated roughage, the effects of the extent of heat treatment and ruminal degradation on the post-ruminal digestibility of the rumen-bypassed protein and the total digestibility from rumen to post-ruminal tracts were studied. First cutting Italian ryegrass dried at four levels of temperature (freeze, 40, 80 and 120°C) were prepared. Materials were put into the rumen by nylon bag technique for 0, 2 and 6 hr., after rumen exposure, the residual protein was incubated by pepsin-pancreatin artificial digestion method. The total protein was partitioned using three fractions based on ruminal and pepsin-pan-creatin (P-P)degestibility. Three fractions contain ruminal degraded fraction, P-P digestible fraction and indigestible fraction. The results obtained from this study were as follows: (1) The rumen-bypassed protein became larger in quantity with heat treatment. (2) In spite of the period of rumen exposure, P-P digestibility of the rumen-bypassed protein showed only about 50%. (3) With respect to the total protein digestibility based on the fraction, samples dried at 80 and 120°C showed lower digestibility because of the increase of the indigestible fraction, but the digestibility was increased as the rumen-bypassed protein could be digested by pepsin-pancreatin.
Citation
Maeda, Y; Masuko, T; Awaya, K; and Sugimura, K, "The Effects of Heat Treatment and Ruminal Degradation on Digestibility of Rumen- Bypassed Protein and Total Digestibility" (1985). IGC Proceedings (1985-2023). 13.
(URL: https://uknowledge.uky.edu/igc/1985/ses10/13)
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
The Effects of Heat Treatment and Ruminal Degradation on Digestibility of Rumen- Bypassed Protein and Total Digestibility
Kyoto Japan
In order to investigate the protein digestibility of heated roughage, the effects of the extent of heat treatment and ruminal degradation on the post-ruminal digestibility of the rumen-bypassed protein and the total digestibility from rumen to post-ruminal tracts were studied. First cutting Italian ryegrass dried at four levels of temperature (freeze, 40, 80 and 120°C) were prepared. Materials were put into the rumen by nylon bag technique for 0, 2 and 6 hr., after rumen exposure, the residual protein was incubated by pepsin-pancreatin artificial digestion method. The total protein was partitioned using three fractions based on ruminal and pepsin-pan-creatin (P-P)degestibility. Three fractions contain ruminal degraded fraction, P-P digestible fraction and indigestible fraction. The results obtained from this study were as follows: (1) The rumen-bypassed protein became larger in quantity with heat treatment. (2) In spite of the period of rumen exposure, P-P digestibility of the rumen-bypassed protein showed only about 50%. (3) With respect to the total protein digestibility based on the fraction, samples dried at 80 and 120°C showed lower digestibility because of the increase of the indigestible fraction, but the digestibility was increased as the rumen-bypassed protein could be digested by pepsin-pancreatin.
