Efécto terapéutico de la suplementación estratégica con cobre en terneros de cría

MATTIOLI GA; FAZZIO LE; PICCO SJ; ROSA DE; MELANI G; PALACIOS A.

Revista Veterinaria

Facultad de Cs. Veterinarias-UNNE

Lugar: Corrientes; Año: 2007 vol. 18 p. 9 - 13

1668-4834

Resumen: Debido a que las menores ganancias diarias de peso (GDP)son una seria consecuencia de la carencia de Cu en los sistemas de cría bovina,en una zona con incidencia endémica de hipocuprosis se evaluó el efecto terapéutico de la suplementación de las madres al final de su gestación y de sus terneros a los tres meses de edad. Este grupo de suplementación estratégica (GSE)fue comparado con otros dos grupos: uno suplementado (GS)que mantuvo durante el ensayo un estatus normal de Cu y un grupo no suplementado (GNS) que reflejó la carencia.Los terneros de cada grupo nacieron sin diferencia de peso en agosto.Las GDP fueron similares para los grupos GS y GSE hasta diciembre,cuando comenzó a disminuir la performance del GNS.En febrero el GS se diferenció claramente del GNS,mientras que el GSE perdió performance y acompañó al GNS.Las cupremias re .ejaron claramente el comportamiento de la GDP,aunque las menores GDP en el GSE al .nal del ensayo se presentaron con hipocupremias moderadas,superiores a las consideradas de riesgo.Se concluye que bajo las condiciones de este ensayo,la suplementación estratégica de las madres en el último tercio de la gestación y de los terneros cuando promedian los tres meses de edad es útil para evitar menores GDP,pero deja un lapso previo al destete que origina pérdidas de performance. Abstract Considering that low average daily gain (ADG)is a serious consequence of Cu deficiency in breeding cattle,the therapeutic effects of Cu supplementation was evaluated in third-trimester pregnant cows and their three-months old calves in an endemic area of hypocuprosis.This strategic supplementation group (SSG)was compared with other two groups:one Cu-supplemented (SG)which maintained normal Cu status,and the other non-supplemented (NSG)which expressed Cu de .ciency.The calves of each group were born in August without body weight differences.The AVG was similar for both SG and SSG groups until December when NSG performance began to reduce.In February the SG was clearly different from NSG,while SSG decreased its performance and remained similar to the NSG. The cupremia clearly reflected the AVG differences,although the lower ADG in the SSG at the end of the trial occurred in the presence of moderate hypocupremia,and this Cu concentration was higher than that considered risky.It is concluded that,under the conditions of this study,the strategic supplementation of cows during the last trimester of pregnancy and calves at the age of three months old was useful to avoid low ADG,although there was a period of time before weaning with performance loss.Debido a que las menores ganancias diarias de peso (GDP)son una seria consecuencia de la carencia de Cu en los sistemas de cría bovina,en una zona con incidencia endémica de hipocuprosis se evaluó el efecto terapéutico de la suplementación de las madres al final de su gestación y de sus terneros a los tres meses de edad. Este grupo de suplementación estratégica (GSE)fue comparado con otros dos grupos: uno suplementado (GS)que mantuvo durante el ensayo un estatus normal de Cu y un grupo no suplementado (GNS) que reflejó la carencia.Los terneros de cada grupo nacieron sin diferencia de peso en agosto.Las GDP fueron similares para los grupos GS y GSE hasta diciembre,cuando comenzó a disminuir la performance del GNS.En febrero el GS se diferenció claramente del GNS,mientras que el GSE perdió performance y acompañó al GNS.Las cupremias re .ejaron claramente el comportamiento de la GDP,aunque las menores GDP en el GSE al .nal del ensayo se presentaron con hipocupremias moderadas,superiores a las consideradas de riesgo.Se concluye que bajo las condiciones de este ensayo,la suplementación estratégica de las madres en el último tercio de la gestación y de los terneros cuando promedian los tres meses de edad es útil para evitar menores GDP,pero deja un lapso previo al destete que origina pérdidas de performance. Abstract Considering that low average daily gain (ADG)is a serious consequence of Cu deficiency in breeding cattle,the therapeutic effects of Cu supplementation was evaluated in third-trimester pregnant cows and their three-months old calves in an endemic area of hypocuprosis.This strategic supplementation group (SSG)was compared with other two groups:one Cu-supplemented (SG)which maintained normal Cu status,and the other non-supplemented (NSG)which expressed Cu de .ciency.The calves of each group were born in August without body weight differences.The AVG was similar for both SG and SSG groups until December when NSG performance began to reduce.In February the SG was clearly different from NSG,while SSG decreased its performance and remained similar to the NSG. The cupremia clearly reflected the AVG differences,although the lower ADG in the SSG at the end of the trial occurred in the presence of moderate hypocupremia,and this Cu concentration was higher than that considered risky.It is concluded that,under the conditions of this study,the strategic supplementation of cows during the last trimester of pregnancy and calves at the age of three months old was useful to avoid low ADG,although there was a period of time before weaning with performance loss.Considering that low average daily gain (ADG)is a serious consequence of Cu deficiency in breeding cattle,the therapeutic effects of Cu supplementation was evaluated in third-trimester pregnant cows and their three-months old calves in an endemic area of hypocuprosis.This strategic supplementation group (SSG)was compared with other two groups:one Cu-supplemented (SG)which maintained normal Cu status,and the other non-supplemented (NSG)which expressed Cu de .ciency.The calves of each group were born in August without body weight differences.The AVG was similar for both SG and SSG groups until December when NSG performance began to reduce.In February the SG was clearly different from NSG,while SSG decreased its performance and remained similar to the NSG. The cupremia clearly reflected the AVG differences,although the lower ADG in the SSG at the end of the trial occurred in the presence of moderate hypocupremia,and this Cu concentration was higher than that considered risky.It is concluded that,under the conditions of this study,the strategic supplementation of cows during the last trimester of pregnancy and calves at the age of three months old was useful to avoid low ADG,although there was a period of time before weaning with performance loss.