Federal Departement of Economic Affairs DEA Agroscope Liebefeld-Posieux Research Station ALP
Influence of feeding
Influence of feeding tanniferous tanniferous sainfoin on the nitrogen balance sainfoin on the nitrogen balance of lambs artificially infected with the
of lambs artificially infected with the abomasal abomasal nematode nematode Haemonchus contortus
Haemonchus contortus
A. Scharenberg A. Scharenberg, Y. , Y. Arrigo Arrigo, F. , F. Heckendorn Heckendorn, H. Hertzberg, A. , H. Hertzberg, A. Gutzwiller Gutzwiller, H.D. , H.D.
Hess, M.
Hess, M. Kreuzer Kreuzer and F. Dohme and F. Dohme Agroscope Liebefeld
Agroscope Liebefeld- -Posieux, Research Station ALP, Posieux, Switzerland Posieux, Research Station ALP, Posieux, Switzerland Research Institute for Organic Farming (
Research Institute for Organic Farming (FiBL FiBL), Frick, Switzerland ), Frick, Switzerland Institute of
Institute of Parasitology Parasitology, University of Zurich, Zurich Switzerland , University of Zurich, Zurich Switzerland
ETH Zurich, Institute of Animal Science, Zurich, Switzerland
ETH Zurich, Institute of Animal Science, Zurich, Switzerland
Introduction Introduction
CT CT
polyphenols
differ in structure and monomeric composition
bind to protein in the rumen
decreased ruminal protein degradation
reduced urinary nitrogen loss
improved supply with essential amino acids
anthelmintic effects
Sainfoin Sainfoin
temperate forage legume
moderate content of condensed tannins (CT; 3 -10 % in DM)
Introduction Introduction
Does the
Does the anthelmintic anthelmintic effect result from a direct impact of effect result from a direct impact of CT on the nematodes or from counterbalancing the higher CT on the nematodes or from counterbalancing the higher protein requirements of the host by a better protein supply ? protein requirements of the host by a better protein supply ?
Evaluation of the effect of
Evaluation of the effect of sainfoin sainfoin compared to compared to grass
grass- - clover on the nitrogen balance and infection clover on the nitrogen balance and infection parameters in lambs artificially infected with the parameters in lambs artificially infected with the nematode
nematode Haemonchus Haemonchus contortus. contortus .
Objective
Objective
infection
establishment of infection
3 4
1
9 infected lambs 3 uninfected lambs
2
Animals Animals
36 female White Alpine lambs 36 female White Alpine lambs
3 groups of 12 lambs (BW: 30.5 ± 2.2 kg)
6
experimental diets
adaptation
5
6 infected lambs 2 uninfected lambs
slaughter collection
7
weeks of the experiment Grass-clover hay
12 lambs -2
deworming
-1
Treatments (n=6) Treatments (n=6)
Feed per d
• 66 g OM/kg BW 0.75
• 20 g mineral mix/head
SI: Infected lambs fed dried sainfoin
SIPEG: Infected lambs fed dried sainfoin treated with 100 g/d PEG
GI: Infected lambs fed dried grass-clover mixture GU: Uninfected lambs fed dried grass-clover mixture
Polyethylene glycol CT inactivating agent
g/kg DM g/kg DM
g/kg DM
6 132
883 Grass-clover (dried): 2 nd cut from a ley
36 Sainfoin (dried): 1 st cut of a 2 nd year stand 197
CT CP
OM
889
Infection parameters Infection parameters
Fecal egg counts Fecal egg counts
Experimental diet Weeks post infection
1 2 3 4 5 6 7
Fecal egg count (eggs / g DM)
-10000 -5000 0 5000 10000 15000 20000
SI SIPEG GI
Treatment: P = 0.280 Week: P < 0.001
Treatment x Week: P = 0.833
SEM
Infection parameters Infection parameters
Packed cell volume Packed cell volume
Weeks post infection
1 2 3 4 5 6 7
Packed cell volume (L/L)
