Feed Strategy - July 2019 - 30

30 ❙ FeedStrategy
MILK QUALITY, COMPOSITION
elevated or fluctuating levels indicate areas for improvement. Ensure
sampling is always carried out at
the same time relative to feeding
but the target should be 8-12 mg/dl.
One of the most effective ways to
improve how efficiently dietary N is

used and, consequently, MUN, is to
ensure a well-balanced diet in terms
of energy and protein.
Rumen microbes rely on energy
to be able to use the N available to
them, thus insufficient energy will
lead to wasted N.

Guidelines for interpreting the level of
components in the milk of dairy cows
Somatic cell counts (SCC )
<100 000

Target / ideal

<150 000

Acceptable

>200 000

Indicates problem

Identify individual animals and treat. Cull repeat offenders.
Milk fat

Target

Depends on many factors

Elevated

Can indicate ketosis

Depressed

Insufficient fiber/excess
fermentable carbohydrates/
compromised rumen function

Breed (50%), stage of lactation, season, age, body condition,
health status affect milk fat. Acetate drives milk fat.
Influenced by dietary fats, reductions in dry
matter intake (DMI), energy density of the diet,
ration balance and structure, health status
Milk protein
Breed accounts for 50% of the variation. Less variable
than milk fat and less influenced by diet.

Target

Depends on many factors

Elevated

Uncommon

Depressed

Possible dietary protein deficiency

Also, possible health issue/disease.

Fat-to-protein ratio (FPR)
Target

1.3

Acceptable values vary with factors that
affect milk fat and protein.

Inverted

<1.0
Can indicate ruminal acidosis

Possibly due to low DMI, poor diet balance and composition,
especially a lack of fiber and/or excess concentrate.

Elevated

>1.42
Can indicate ketosis

Threshold of >1.42 (or even 1.35) could be used
to screen cows for sub-clinical ketosis.
Milk urea nitrogen (MUN)

Target

8 - 12mg/dl

Elevated

>12mg/dl

Excess dietary protein, especially rumen degradable
protein (RDP), inefficient utilization of dietary N, poor
dietary energy/protein balance, poor ration structure.

Depressed

<8mg/dl

Dietary protein deficiency, insufficient RDP.

Source: Heinrichs and Jones (2016), Ishler (2016)

An overview of the interpretation of milk component levels. | Source: Heinrichs and Jones (2016), Ishler (2016)
www.WATTAgNet.com ❙ July 2019


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Feed Strategy - July 2019

Table of Contents for the Digital Edition of Feed Strategy - July 2019

Feed Strategy - July 2019
Contents
In the Mix
Industry Happenings
Consumers invested in animal welfare, but knowledge is limited
Piglet welfare is compromised by feed regulations
Nutritional strategies for piglet diets without zinc oxide
Marketing nutrition through your own local offices
Retiring AFIA CEO Joel Newman’s advice for feed industry
Nutritional factors that influence milk quality, composition
Modern dairy cows deserve modern vitamin nutrition
The effect of feed particle size on pig health
SPACE to focus on many issues facing agriculture
The latest in bulk feed transportation equipment
Products
Advertisers’ Index
Feed Strategy - July 2019 - CT1
Feed Strategy - July 2019 - CT2
Feed Strategy - July 2019 - Feed Strategy - July 2019
Feed Strategy - July 2019 - Cover2
Feed Strategy - July 2019 - Contents
Feed Strategy - July 2019 - In the Mix
Feed Strategy - July 2019 - Industry Happenings
Feed Strategy - July 2019 - Consumers invested in animal welfare, but knowledge is limited
Feed Strategy - July 2019 - 5
Feed Strategy - July 2019 - 6
Feed Strategy - July 2019 - 7
Feed Strategy - July 2019 - Piglet welfare is compromised by feed regulations
Feed Strategy - July 2019 - 9
Feed Strategy - July 2019 - 10
Feed Strategy - July 2019 - 11
Feed Strategy - July 2019 - 12
Feed Strategy - July 2019 - 13
Feed Strategy - July 2019 - 14
Feed Strategy - July 2019 - 15
Feed Strategy - July 2019 - 16
Feed Strategy - July 2019 - 17
Feed Strategy - July 2019 - 18
Feed Strategy - July 2019 - Nutritional strategies for piglet diets without zinc oxide
Feed Strategy - July 2019 - 20
Feed Strategy - July 2019 - 21
Feed Strategy - July 2019 - Marketing nutrition through your own local offices
Feed Strategy - July 2019 - 23
Feed Strategy - July 2019 - Retiring AFIA CEO Joel Newman’s advice for feed industry
Feed Strategy - July 2019 - 25
Feed Strategy - July 2019 - 26
Feed Strategy - July 2019 - 27
Feed Strategy - July 2019 - Nutritional factors that influence milk quality, composition
Feed Strategy - July 2019 - 29
Feed Strategy - July 2019 - 30
Feed Strategy - July 2019 - 31
Feed Strategy - July 2019 - Modern dairy cows deserve modern vitamin nutrition
Feed Strategy - July 2019 - 33
Feed Strategy - July 2019 - 34
Feed Strategy - July 2019 - 35
Feed Strategy - July 2019 - The effect of feed particle size on pig health
Feed Strategy - July 2019 - 37
Feed Strategy - July 2019 - 38
Feed Strategy - July 2019 - 39
Feed Strategy - July 2019 - 40
Feed Strategy - July 2019 - SPACE to focus on many issues facing agriculture
Feed Strategy - July 2019 - The latest in bulk feed transportation equipment
Feed Strategy - July 2019 - Products
Feed Strategy - July 2019 - Advertisers’ Index
Feed Strategy - July 2019 - Cover3
Feed Strategy - July 2019 - Cover4
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