@article{oai:miyazaki-u.repo.nii.ac.jp:00000832, author = {中川, 敏法 and Nakagawa, Toshinori and 福山, 喜一 and Kobayashi, Ikuo and 小林, 郁雄 and 新美, 光弘 and Niimi, Mitsuhiro and 川村, 修 and Kawamura, Osamu and 中川, 敏法 and Nakagawa, Toshinori and Fukuyama, Kiichi}, issue = {2}, journal = {日本暖地畜産学会報}, month = {}, note = {Feeding of cedar raw sawdust as main roughage to breeding Japanese Black cattle is gradually spreading in Miyazaki prefecture, Japan. In general, this feeding method has been done by a mixture of sawdust and concentrate. In addition, a small amount of forage usually offers to animals in the afternoon. We investigated the feeding effect of particle size of sawdust on eating and ruminating patterns, Roughage Value Index (RVI), rumen fluid characteristics and blood serum composition. Cattle were given 2 different rations, (1) a mixture of normal size sawdust (without sieving) with concentrate, and a small amount (448 g DM/head) of rhodesgrass hay (control), (2) a mixture of small size sawdust (through a 5 mm sieve) with concentrate, and a small amount (448 g DM/head) of rhodesgrass hay (treatment). Results showed that total rumination time, number of rumination, average ruminating time, elapsed time (from the end of eating time to the beginning of rumination) and RVI were not affected (P>0.05) by the feeding of rations. In rumen fluid characteristics, pH value was more than 6.5 in both control and treatment rations. The protozoa numbers of feeding of both control and treatment rations were lower than the normal level (10-100×104/dl of ruminal fluid). In blood composition, the values of some parameters were not within the standard level, but did not get off remarkably. In conclusion, particle size of sawdust may not be a matter of concern, if animals are introduced to the sawdust with concentrate and a small amount of forage., 宮崎県内の黒毛和種繁殖牛飼養農家で,無処理の杉ノコクズを主要な粗飼料とする飼養法が普及しつつある.本研究では,この飼養法におけるノコクズの粒度が採食・反芻,粗飼料因子(RVI),ルーメン液性状,血液性状に及ぼす影響について調査した.3頭の黒毛和種繁殖牛を用い,約1カ月間の試験期間の前半を対照区,後半を処理区とした.対照区では通常のノコクズを,処理区では5 mm篩を通したノコクズを,それぞれ濃厚飼料と3:4で混合して給与した.両試験区ともローズグラス乾草を1日1頭当たり0.5 kg補給した. その結果,反芻期数,平均反芻時間,採食終了から反芻開始までの時間,RVIは試験区間に有意差が認められなかった.また,反芻時間は両試験区とも十分に確保された.ルーメン液性状,血液性状についても,両試験区ともに特に問題はなかった.以上のことから,このような飼養法においては,ノコクズの粒度に特に留意する必要はないと考えられた.}, pages = {127--132}, title = {無処理杉ノコクズを主要な粗飼料とする黒毛和種繁殖牛の飼養におけるノコクズの粒度が反芻行動、ルーメン液性状および血液性状に及ぼす影響}, volume = {53}, year = {2010}, yomi = {ナカガワ, トシノリ and フクヤマ, キイチ and コバヤシ, イクオ and ニイミ, ミツヒロ and カワムラ, オサム and ナカガワ, トシノリ} }