1990 Fiscal Year Final Research Report Summary
Feed Digestion Dynamics and Utilization of Energy and Protein by Ruminant
| Project/Area Number |
01304024
|
|---|
| Research Category |
Grant-in-Aid for Co-operative Research (A)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
畜産化学
|
|---|
| Research Institution | Hokkaido University |
|---|
Principal Investigator |
ASAHIDA Yasushi Hokkaida Univ., Fac. Agriculture, Professor, 農学部, 教授 (00001404)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
TANAKA Keiichi Gifu Univ., Fac. agriculture, Professor, 農学部, 教授 (30021710)
HOSHINO Sadao Mie Uiv., Fac. Bioresources, Professor, 生物資源学部, 教授 (90024546)
TANIGUCHI Kozo Hiroshima Univ., Fac. Applied Biological Science, Associate Professor, 生物生産学部, 助教授 (30093777)
SEKINE Junjiro Tottori Univ., Fac. Agriculture, Associate Professor, 農学部, 助教授 (40001466)
OKUBO Masahiko Hokkaido Univ., Fac. Agriculture, Associate Professor, 農学部, 助教授 (40001458)
|
|---|
| Project Period (FY) |
1989 – 1990
|
| Keywords | Ruminant / Digestion dynamics / Digestive tract / Digesta particle / Digestibility / Ammoniated rice straw / Bacterial count / Lipogenesis |
|---|
| Research Abstract |
Feed digestion dynamics and utilization of energy and protein by ruminant was investigated. Results were as follows.
(1) Particle size distribution of digesta in cattle and sheep fed on mixed ration (concentrate 75 : roughage 25) and hay only was determined. Particles over 1180 m were 30-40% in rumen and 10% in lower tract. Haywood diameter of digesta particles were 1100-1200 m in rumen and 600-800 (cattle) or 300-400 (sheep) in lower tract. Passage rate of digesta particles were measured with rare earth marker and digestion dynamics in rumen was calculated. Digestion dynamics in rumen was changed with hay cutted at different stage.
(2) In the experiment with different starch and protein sodrces for cattle, OM and starch digestibility in rumen were higher for corn diet supplemented with high-dg soybean meal than low-dg corn gluten meal. Fiber digestibility was more affected by starch source than protein source. Intestinal digestibility of starch infused in abomasum was 75-86% and tended to decrease with increase of intestinal fiber.
(3) Ammoniation of rice straw increased OM and fiber digestibility in rumen and whole tract and VFA production in sheep. Total bacterial count in rumen and rectum and ruminal cellulolytic bacterial count increased on ammoniated straw. Roll tube method showed also increase in total and cellulolytic bacterial count on ammoniated straw.
(4) In 'lipid metabolism trials with lactating and non-lactating goats fed on roughage only and highcocentrate diet, lower FFA in blood and higher activity of lipogenic-related enzymes in subcutaneous adipose tissue were obtained on high-concentrate diet. Ability of fatty acid synthesis in mammary gland tissue was high in lactating goat and not differed with diets.
|
