Feeding and nutrition of Dairy cow in the dry period Flashcards

1
Q

Length and phases of the dry period

A

See phase 4 and 5 of the prev topic

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2
Q

Phase 4: 6 points including timing and goals

A

Day 305-350

Goals: reach high milk yield in the next lactation, and minimize metabolic problems

The Ca and P requirements

Do not give too high nutrient supply

CP

Daily feed

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3
Q

Phase 4: Ca and P requirements

A
  • Ca: 6.1g/100kgBW
  • P: 4.2g/100kgBW

*NB to meet these and not go too high in order to prevent milk fever

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4
Q

Phase 4: CP

A

Min 12%

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5
Q

Phase 4: daily feed (3)

A
  1. 40 days before calving: meadow hay ad lib and 10-15kg of corn silage
  2. Supplement: Vit E and Se
  3. 14-21 days before calving: incr conc from 1-1.5kg per day to 4-5kg per day (*I think this is flushing)
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6
Q

CAB (5)

A
  1. Cation Anion balance
  2. Should be btw -50 and -150
  3. Acidic chlorides and sulphates reduce the risk of parturient paresis
  4. but slight acidosis may stim Ca mobilisation from the bones
  5. Anionic supplements: 100g of either NH4Cl or MgSO4
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7
Q

Phase 5: 7 things to mention including timing and goal

A
  1. Day 350-365
  2. Goal: allow rumen bacteria to become acustomed to lactation feed
  3. At time of calving, the Ca:P ratio needs to be lower therefore reduce Ca
  4. NEl:
  5. CP:
  6. Feed
  7. Supplements
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8
Q

Phase 5 NEl:

A

5.7-5.9 MJ/kg DM

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9
Q

Phase 5: CP

A

14-16%

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10
Q

Phase 5: feed

A

30% of the ration for high yielding dairy cows

Grass or hay ad lib

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11
Q

Phase 5: supplements (4)

A
  1. Organic bound microelements
  2. Yeast
  3. Propylene glycol
  4. Vits and mins
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12
Q
A
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