POPM 4230 Lecture Notes - Lecture 20: Ester, Rumen, Fetus
7 Dec 2018
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The biggest demand from the fetus is the third trimester. Transition from low energy to high energy diet. Need a lot of energy into it esp glc. Opening of teats and reproductive tract = susceptible to other diseases. Neb = first 60 days of lactation, cannot eat enough to meet demand. Clinical disease incidence (the level of disease presence) Measure dry matter intake (can indicate disease, drop severely = more likely to get disease) Measure body condition score (how significant of the neb is) Feed access (important to have feed at all times, need energy) Clinical tests: bhb (beta hydroxybutyrate), non-esterified fatty acid (nefa) One of the most important determinants of health and performance. Can be difficult to monitor this individually. Able to monitor the group level and give you some idea. Measurement of group-average dmi can be a useful starting point for early warning. A 1 kg decrease in individual dmi in the week before calving is associated with.
