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Changes in nutrient composition and in vitro ruminal fermentation of total mixed ration silage stored at different temperatures and periods
Author(s) -
Kondo Makoto,
Shimizu Kazuma,
Jayanegara Anuraga,
Mishima Takashi,
Matsui Hiroki,
Karita Shuichi,
Goto Masakazu,
Fujihara Tsutomu
Publication year - 2015
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.7200
Subject(s) - silage , fermentation , rumen , total mixed ration , chemistry , food science , sugar , zoology , dry matter , composition (language) , agronomy , biology , lactation , linguistics , philosophy , pregnancy , ice calving , genetics
BACKGROUND Total mixed ration ( TMR ) is widely used for dairy cattle and needs to be prepared daily because it deteriorates rapidly. Ensiling TMR allows preservation and saves labour at the farm; however, silage fermentation may influence various nutritional components. The objectives of this study were to evaluate nutritional changes and in vitro rumen fermentation of TMR silage that was stored at different temperatures and durations on a laboratory scale in comparison with those of typical TMR before ensiling. RESULTS No distinct changes in crude protein ( CP ), neutral detergent fibre and non‐fibrous carbohydrate contents were observed during silage fermentation. However, clear changes were observed in the soluble CP and soluble sugar fractions; solubilisation of the CP fraction in TMR silage was enhanced by prolonged storage and higher storage temperatures, and most soluble sugars were lost during ensiling. Short‐chain fatty acid concentrations in the in vitro rumen from TMRs before and after ensiling were not significantly different; however, throughout incubation, NH 3 ‐N concentrations from TMR silages were significantly higher than those from TMR before ensiling. CONCLUSION A higher ruminal NH 3 ‐N concentration from TMR silage may be a result of a shortage of fermentable sugars and enhanced deamination of CP . Feeding TMR ensiled under a high temperature must be investigated to balance proteins and carbohydrates for rumen fermentation. © 2015 Society of Chemical Industry