Untersuchungen zum Einfluss Seltener Erd-Citrate auf Leistungsparameter beim Schwein und die ruminale Fermentation im künstlichen Pansen (RUSITEC)
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vor 19 Jahren
Investigations on the effects of Rare earth Element Citrates on
growth promoting parameters in pigs and on ruminal fermentation in
an artificial rumen (RUSITEC) For decades Rare Earth Elements, such
as lanthanum, cerium, and praseodymium have been used in Chinese
agriculture and farming for yield increase and growth promoting
effects. Many Chinese studies showed partly enormous growth
promoting effects whereas the most spectacular is seen in poultry
and pig production. Several feeding trials with Rare Earth Elements
were already carried out in our working group. So far mineral salt
chlorides were used in previous studies. In the present study we
tested for the first time the effects of Rare Earth Elements
Citrate in grower pigs as well as in an in vitro trial in
ruminants. A feeding study with 28 piglets (German Landrace x
Piétrain) was carried out. They were separated in 4 dietary groups,
each containing 7 animals. These animals received a regular diet,
supplemented with a mixture of Rare Earth Elements Citrate in
concentrations of 0, 50, 100, and 200 mg/kg feed for a 6 week
period. A positive effect of the Rare Earth Elements Citrate on
fattening performance parameters was determined. In the trial
period the daily body weight gain of the two high supplemented
groups increased between 8.6 % to 22.6 % compared to the control
group. The low dosage group showed no difference. An increase in
the feed conversion rate from 2 % to 6 % was shown in all Rare
Earth Elements supplemented groups. This indicates that within the
pig feeding highly increased growth-promoting effects were
determined when supplemented with Rare Earth Elements Citrate
compared with the studies in which the chloride form was used. The
study on possible effects of Rare Earth Elements in ruminal
fermentation was carried out with the Rumen Simulation Technique
(RUSITEC), an artificial rumen. The effect of Rare Earth Elements
in different dosages was compared to a negative control (without
supplement) and a positive control (Tetracycline). Each trial
lasted for a period of 10 days. The influence on the parameters
pH-value, NH3, redox potential, fatty acid pattern, and gas
production was analysed. Since the ruminal fermentation was not
influenced, the conclusion can be drawn, that in this respect
microorganisms are not affected by Rare Earth Elements.
growth promoting parameters in pigs and on ruminal fermentation in
an artificial rumen (RUSITEC) For decades Rare Earth Elements, such
as lanthanum, cerium, and praseodymium have been used in Chinese
agriculture and farming for yield increase and growth promoting
effects. Many Chinese studies showed partly enormous growth
promoting effects whereas the most spectacular is seen in poultry
and pig production. Several feeding trials with Rare Earth Elements
were already carried out in our working group. So far mineral salt
chlorides were used in previous studies. In the present study we
tested for the first time the effects of Rare Earth Elements
Citrate in grower pigs as well as in an in vitro trial in
ruminants. A feeding study with 28 piglets (German Landrace x
Piétrain) was carried out. They were separated in 4 dietary groups,
each containing 7 animals. These animals received a regular diet,
supplemented with a mixture of Rare Earth Elements Citrate in
concentrations of 0, 50, 100, and 200 mg/kg feed for a 6 week
period. A positive effect of the Rare Earth Elements Citrate on
fattening performance parameters was determined. In the trial
period the daily body weight gain of the two high supplemented
groups increased between 8.6 % to 22.6 % compared to the control
group. The low dosage group showed no difference. An increase in
the feed conversion rate from 2 % to 6 % was shown in all Rare
Earth Elements supplemented groups. This indicates that within the
pig feeding highly increased growth-promoting effects were
determined when supplemented with Rare Earth Elements Citrate
compared with the studies in which the chloride form was used. The
study on possible effects of Rare Earth Elements in ruminal
fermentation was carried out with the Rumen Simulation Technique
(RUSITEC), an artificial rumen. The effect of Rare Earth Elements
in different dosages was compared to a negative control (without
supplement) and a positive control (Tetracycline). Each trial
lasted for a period of 10 days. The influence on the parameters
pH-value, NH3, redox potential, fatty acid pattern, and gas
production was analysed. Since the ruminal fermentation was not
influenced, the conclusion can be drawn, that in this respect
microorganisms are not affected by Rare Earth Elements.
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