Data/hora: 16/06/2024 07:20:18

Biblioteca(s): | Embrapa Pantanal.
Data corrente: | 13/03/1997
Data da última atualização: | 13/03/1997
Autoria: | HEAD, M. A.; SMITH, G. S.; TRUJILLO, P. A.; HERBEL, C. H.; SANSON, D.
Afiliação: | New Mexico State University, Las Cruces.
Título: | Copper, manganese and zinc status of beef cows grazing dormant forage on arid range as affected by supplemental feeds.
Ano de publicação: | 1982
Fonte/Imprenta: | Proceedings, Western Section, American Society of Animal Science, v.33, p.239-241, 1982.
Idioma: | Inglês
Conteúdo: | Copper (Cu), manganese (Mn) and zinc (Zn) were measured in dormant, mature forage grazed by mother cows on arid range in southern New Mexico and in conventional and experimental feeds used as range supplements during a 112 day period. Micronutrient contents of forage were: Cu, 4.6 +- .5; Mn, 25.6 +- 12.3; and Zn, 12.0 +- 2.2 ppm, dry basis. These levels reflect marginal adequacy of Cu and deficiency of Zn. At the levels fed, neither cube provided appreciable amounts of Cu or Mn, but cottonseed meal contained 140 +- 50 ppm Zn. An experimental feed formulated with 50 percent dried, irrasdiated sewage solids from primary sludge contained 88 +- 9 ppm Cu, 61 +- 2 ppm Mn, and 176 +- 9 ppm Zn, amounts suggesting possible nutritive benefits. When fed at about 0.9 kg per head daily for 112 days, cottonseed meal and experimental supplement sustained similar levels of Cu, Mn and Zn in blood and milk, and thjese were not different (P>.10) than  levels for cows fed 0.2 kg of grain cube daily. Most of the values for Cu, Mn and Zn in blood and milk were within the range of values reported as normal for cattle, despite earlier suggestion of deficiency in cattle grazing this range.
Palavras-Chave: | Alimento suplementar; Arid range; Dormant forage; Forragem dormance; Supplemental feeds.
Thesagro: | Cobre; Manganês; Vaca de Corte; Zinco; Zona Arida.
Thesaurus Nal: | beef cows; copper; manganese; zinc.
Categoria do assunto: | --
Registro original: | Embrapa Pantanal (CPAP)
Exemplares: | CPAP - (34160-1) - ADC - SP - -- - SP3503 -  - 3503 - DIS