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The effect of pelleting on in situ rumen degradability of compound feed containing brown rice for dairy cows
Author(s) -
Tagawa Shinichi,
Yoshida Norio,
Iino Yukihiro,
Horiguchi Kenichi,
Takahashi Toshiyoshi,
Watanabe Maria,
Takemura Kei,
Ito Syuhei,
Mikami Toyoji
Publication year - 2017
Publication title -
animal science journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.606
H-Index - 38
eISSN - 1740-0929
pISSN - 1344-3941
DOI - 10.1111/asj.12654
Subject(s) - rumen , zoology , feed additive , chemistry , dairy cattle , in situ , agronomy , food science , biology , fermentation , organic chemistry , broiler
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.