title: The effect of pelleting on in situ rumen degradability of compound feed containing brown rice for dairy cows.
abstract: This study was conducted to determine the effect of pelleting on in situ dry matter degradability of pelleted compound feed containing brown rice for dairy cows. Mash feed of the same composition was used as a control and the in situ study was conducted using three non-lactating Holstein steers fitted with a rumen cannula. The feeds contained 32.3% brown rice, 19.4% rapeseed meal, 11.4% wheat bran and 10.6% soybean meal (fresh weight basis). Except for moisture content, the chemical composition of the feed was not affected by pelleting. In situ dry matter disappearance of the feed increased from 0 to 2 h and after 72 h of incubation with pellet processing. Integration of the dry matter disappearance values over time revealed that degradability parameter a (soluble fraction) increased with pellet processing, whereas parameter b (potentially degradable fraction) decreased. Parameter c (fractional rate of degradation) and effective degradability (5% passage rate) were not affected by pellet processing. We concluded that pellet processing promotes rumen degradability at early incubation hours when the pelleted feed contains brown rice.
authors.affiliation: Shimizuko Shiryo Co., Ltd., Ishinomaki, Miyagi, Japan.
authors.forename: Shin-Ichi
authors.initials: SI
authors.lastname: Tagawa
authors.affiliation: Yamagata Field Science Center, Yamagata University, Tsuruoka, Yamagata, Japan.|Japan Grassland Agriculture and Forage Seed Association, Chiyoda, Tokyo, Japan.
authors.forename: Norio
authors.initials: N
authors.lastname: Yoshida
authors.affiliation: Livestock Experiment Station of Yamagata Integrated Agricultural Research Center, Shinjo, Yamagata, Japan.
authors.forename: Yukihiro
authors.initials: Y
authors.lastname: Iino
authors.affiliation: Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata, Japan.
authors.forename: Ken-Ichi
authors.initials: KI
authors.lastname: Horiguchi
authors.affiliation: Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata, Japan.
authors.forename: Toshiyoshi
authors.initials: T
authors.lastname: Takahashi
authors.affiliation: Livestock Experiment Station of Yamagata Integrated Agricultural Research Center, Shinjo, Yamagata, Japan.
authors.forename: Maria
authors.initials: M
authors.lastname: Watanabe
authors.affiliation: Livestock Experiment Station of Yamagata Integrated Agricultural Research Center, Shinjo, Yamagata, Japan.
authors.forename: Kei
authors.initials: K
authors.lastname: Takemura
authors.affiliation: Livestock Experiment Station of Yamagata Integrated Agricultural Research Center, Shinjo, Yamagata, Japan.
authors.forename: Syuhei
authors.initials: S
authors.lastname: Ito
authors.affiliation: Livestock Experiment Station of Yamagata Integrated Agricultural Research Center, Shinjo, Yamagata, Japan.
authors.forename: Toyoji
authors.initials: T
authors.lastname: Mikami
mesh_terms: D000821:Animal Feed / Q000032:analysis; D000818:Animals; D029741:Brassica rapa; D002417:Cattle / Q000502:physiology*; D003612:Dairying; D004032:Diet / Q000662:veterinary*; D004043:Dietary Fiber; D004063:Digestion; D005260:Female; D005511:Food Handling; D012275:Oryza; D012417:Rumen / Q000502:physiology*; D013025:Glycine max
keywords: brown rice; chemical components; in situ dry matter degradability; nylon bag technique; pellet