6679500
Description
Mind Map by Dejani Panazzolo, updated more than 1 year ago
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Created by Dejani Panazzolo
about 8 years ago
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Restricting time at pasture
and concentrate
suplementation in dairy cows
- Problem
- Restricting time at pasture
- Foraging behaviour and herbage dry
matter intake (HDMI).
- Increases hunger level due the
grhelin hormone
- Foraging behaviour and herbage dry
matter intake (HDMI).
- Energy suplementation
- Negative effects in HDMI and DMI
Satiating (reduces motivation to grazing)
- Strategically: substitute herbage and
enhance total energy intake
- Negative effects in HDMI and DMI
Satiating (reduces motivation to grazing)
- Restricting time at pasture
- Hypothesis
- H0: Restricted time modifies grazing
behavior, but not intake or milk
production/composition
- H0: Restricted time modifies grazing
behavior, but not intake or milk
production/composition
- Objective
- Evaluate the effect of restricted time at
pasture (R) vs. concentrate supplementation
levels (S)
- Evaluate the effect of restricted time at
pasture (R) vs. concentrate supplementation
levels (S)
- Materials and methods
- Pastures: Lolium perenne (70%)
- 36 Holstein - mid lactation
Restricted = R0, R4, R8.5
Suplemented = S3, S6
- Measurements
- Pasture and supplement
- Herbage and
supplement intake
- Sward and density
Nutritive value: DM, N
and NDF
- Herbage and
supplement intake
- Milk yield and
composition, live weight
and body condition score
- Grazing Behavior
- Pasture and supplement
- Pastures: Lolium perenne (70%)
- Effect ofrestrictingtimeatpastureandconcentrate
supplementationonherbageintake,grazingbehaviour and
performanceoflactatingdairycows Pablo Miguel Soca et.
al. 2014 Universidad de la Republica (Uruguai) Livestock
Science (1.293 -2015)
- Main results/
Highlights
- Restriction
- Behavior: - Rumination
- Idling + Duration of
initial bout
- + Digestibility
- Milk composition:
- Fat + Protein -
FCM
- Behavior: - Rumination
- Idling + Duration of
initial bout
- Interaction
RxS
- Grazing time
(min/day and %)
- Increase in S at R4 and
R8.5 reduce Bite Rate
- Grazing time
(min/day and %)
- Suplementation
- - Intake
- - Digestibility
- + Milk production
- - BCS change
- - Intake
- Forage intake was not affected by the
restricting time which confirms the
hypothesis in the present experiment.
- Restriction
- Implications/
Conclusions
- Grazing sessions early and late in the
day: higher intake and nutritive value
- Modulation of grazing
behaviour in response to restricting time at
pasture maintained herbage dry matter intake
- Restricted time did not affect intake or
performance: strategy to improve pasture
and reduce selectivity
- Grazing sessions early and late in the
day: higher intake and nutritive value
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