Allocation of feed based on individual dairy cow live weight changes: I: Feed intake and live weight changes during lactation
作者： Dorte Bossen , Martin Riis Weisbjerg , Lene Munksgaard , Søren Højsgaard
DOI: 10.1016/J.LIVSCI.2009.07.010
关键词:
摘要: Abstract Based on individual cow live weight changes, feeding strategies were designed for of dairy cows in loose-housing systems and examined a four-year production trial including 115 Danish Red (DR), 91 Holstein (DH) 93 Jersey (DJ). Cows kept system based automatic milking (AMS). The objective was to examine the relationship between feed intake changes response three examined. All allowed combination mixed ration (MR) individually separately offered concentrate (ISC) AMS. randomly assigned one strategies; MR1, MR2-E or MR2-L. fed according MR1 strategy medium energy during whole lactation. MR2 high early lactation, followed by an (MR2-E) late (MR2-L) change low ration. defined as gain after minimum 15 35 kg respectively DR/DH 11 25 kg DJ. Peak obtained primiparous DJ not significantly higher strategies. Early reduction (MR2-E strategy) caused significant longer duration total period mobilization compared within multiparous DR DH cows. It indicates that concentration forced these into second mobilization, whereas continued concentration. In general results from present experiment indicate can be used manipulate extent especially different suggest transition deposition conditions is reversible process only long are fully adapted metabolism. Additionally relatively short.
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