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The Use of metabolic profiles in Dairy cows
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5
Veterinary Medicine
Graduate
10/28/2015

Additional Veterinary Medicine Flashcards

 


 

Cards

Term
the ability of a dairy herd to achieve optimum productivity depends on the interaction of?
Definition

genetic potential

diet

environment

digestion

metabolism

management

Term
parametres used to assess adequacy of the diet
Definition

1. DMI

2. feed quality

3. feacal consistency

4. observing cows

5. milk production- peak and persistency ( peak x 200= lactation yield) 

6. BCS

7. milk quality- butterfat and protein reflect roughage and energy status of the diet. 

8. disease 

Term
Blood sampling
Definition

Timing is important

May or June: when grass is of optimum quality, provides valuable baseline for comparison with results obtained later in the year under less favourable conditions. 

July or August: valuable to test in summer calving herds. 

Autumn grazing period: Id's potential problems resulting from an over estimation of the nutritional contribution from autumn grass, especially for recently calved cows. 

Winter feeding period: atleast 2-3 wks after cows have been exposed to feeding regime will give a good indication of energy requirements being met

After management changes 

Term
correct timing of blood test
Definition

essential to allow 2-3 hours to elapse after the cow has had a major intake of concentrate feed. 

- also wait atleast 2 weeks after a major dietary changes. the microflora in the rumen take 7-10 days to adjust to a new substrate

Term
Cow selection for sampling
Definition

1. early lactation group- MOST IMPORTANT: 10-20 days post calving, if cows are sampled too long after calving, they may respond to underfeeding by dropping milk yield and quality and have normal biochemical parameters. 

2. Mid lactation group: normally would be over 100 days calved, they will have full potential dry matter intake and should be pregnant again. 

3. Dry cows: 2 weeks prior to calving, sample 5-12 cows

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