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
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
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
4
Q
Phase 4: CP
A
Min 12%
5
Q
Phase 4: daily feed (3)
A
- 40 days before calving: meadow hay ad lib and 10-15kg of corn silage
- Supplement: Vit E and Se
- 14-21 days before calving: incr conc from 1-1.5kg per day to 4-5kg per day (*I think this is flushing)
6
Q
CAB (5)
A
- Cation Anion balance
- Should be btw -50 and -150
- Acidic chlorides and sulphates reduce the risk of parturient paresis
- but slight acidosis may stim Ca mobilisation from the bones
- Anionic supplements: 100g of either NH4Cl or MgSO4
7
Q
Phase 5: 7 things to mention including timing and goal
A
- Day 350-365
- Goal: allow rumen bacteria to become acustomed to lactation feed
- At time of calving, the Ca:P ratio needs to be lower therefore reduce Ca
- NEl:
- CP:
- Feed
- Supplements
8
Q
Phase 5 NEl:
A
5.7-5.9 MJ/kg DM
9
Q
Phase 5: CP
A
14-16%
10
Q
Phase 5: feed
A
30% of the ration for high yielding dairy cows
Grass or hay ad lib
11
Q
Phase 5: supplements (4)
A
- Organic bound microelements
- Yeast
- Propylene glycol
- Vits and mins
12
Q
A