Crecimiento y producción del merino precoz en pastoreo hasta el destete

• Plaza, J. ^[1] ; Martin-Javato, J. ^[1] ; Gutierrez, J. ^[1]
  1. [1] Servicio de Investigación Agraria Apartado 22, 06080 Badajoz
• Localización: Pastos: Revista de la Sociedad Española para el Estudio de los Pastos, ISSN 0210-1270, Nº. Extra 0, 1989 (Ejemplar dedicado a: II Reunión Ibérica de Pastos y Forrajes), págs. 389-397
• Idioma: español
• Títulos paralelos:
  • Growth and production of merino precoz under grazing until weaning
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• Resumen
  • español

    Desde 1985 a 1988 hemos realizado un estudio de pastoreo (30 ha) con 4 tipos de pasto (pasto nativo -Pn, pasto nativo fertilizado con 150 kg/ha/año de superfosfato de cal del 18% -PF, pasto sembrado con T. glomeratum y fertilizado anualmente -PS, pasto nativo después de un cultivo de avena PA) y 2 cargas ganaderas de 1,25 y 2,5 ovejas Merino Precoz por ha con parto anual y destete final de primavera. La disponibilidad media de pasto fue PS=PF>PN>PA (P

  • English

    Between 1985 and 1988 has been made a study on grazing (30 ha "dehesa") with 4 types of pasture (native pasture -PN, native pasture fertilized with 150 kg/ha/year Calcium Superfosfate of 18% -PF, implanted pasture with T. glomeratum and fertilized yearly -PS, and native pasture after on aot crop -PA) and two stocking rate (1.25 and 2.5 Merino Precoz ewes per ha.) with one lambing a year (march) and rearing of lambs at ending spring. The mean availabilities of pastures were PS = PF > PN > PA (P *< 0.05) 301, 1282, 1016 and 589 kg DM/ha respectively, without stocking rate effect, 1099 kg DM/ha the lower and 990 kg DM/ha the higher. The % of legumes was higher (P < 0.05) for PS and PF in relation with PN and PF, with a positive effect of stocking rate (with 1.25 ewe/ha PF 24%, PS 20%, PN 15% and PA 7%, and with 2.50 ewe/ha PF 35%, PS 31% PN 14% and PA 9%. The lambs production per ha was twice in the higher stocking rate (53.4 - PN, 49.4 - PF, 52,7 - PS and 49.4 -PA for 1.25 ewe/ha and 99.4, 108.1, 93.2 and 88.7 respectively for 2.5 ewe/ha). The mean live weight (kg) at rearing (90 days) in relation with sex and type of parturation was 37.9 + 3.8 single males (MI), 34,2 + 3,2 single females (Hl), 30.2 + 3.4 twin males (M2) and 27.9 + 2.7 twin females (H2). The daily average live weight gain (gr) 363 + 39 MI, 326 + 32 Hl, 288 + 37 M2 and 267 + 27 H2.