Effects of dry matter content and ATF [Ammonia Tetra Formate] supplementation on heat generation in total mixed rations after mixing
1999
Isozaki, Y. (Fukuoka-ken. Agricultural Research Center, Chikushino (Japan)) | Kakihara, T. | Harada, M. | Koga, Y.
During hot season, total mixed rations (TMR) after mixing tend to generate heat and decrease feed consumption in dairy cows. TMR were mixed with 60-80% dry matter content, and the heat generation after mixing was examined to develop heat inhibition methods. 1) Heat in TMR was generated earlier after mixing, when the dry matter content decreased. TMR with 80% dry matter content generated no heat during 48 hrs after mixing. 2) Heat TMR was generated earlier after mixing with higher environmental temperature. 3) TMR supplemented with ammonia tetra-formate (ATF) generated no heat during 25 hrs after mixing. TMR with 60 and 70% dry matter content in high environmental temperature generated heat from 26 hrs after mixing in spite of supplemented with ATF. 4) TMR with heat generation decreased feed consumption in dairy cows, when stored for 48 hrs. These results suggest that the TMR with 80% dry matter content or supplemented with ATF restrain heat generation after mixing, and feed consumption in dairy cows after 48 hrs storage does not decrease
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