Ewes and lamb performance managed with different grazing methods and herbage allowance in natural grassland

  • F. Jochims Departamento de Zootecnia, Universidade Federal do Rio Grande do Sul, UFRGS
  • C. H. E. C. Poli Departamento de Zootecnia, Universidade Federal do Rio Grande do Sul, UFRGS
  • G. A. Amaral Pesquisador, Fundação Estadual de Pesquisa Agropecuária, FEPAGRO
  • D. B. David Pesquisador, Fundação Estadual de Pesquisa Agropecuária, FEPAGRO
  • E. B. Azevedo Departamento de Zootecnia, Universidade Federal do Rio Grande do Sul, UFRGS
  • N. C. Fajardo Departamento de Zootecnia, Universidade Federal do Rio Grande do Sul, UFRGS

Keywords:

Continuous stocking, pampa Biome, rotational stocking, sheep

Abstract

The objective of was to determine the influence of grazing methods with a relatively low or high herbage allowance in the first 84 gestation days on ewes/lambs daily weight gain (DWG) and area production. The study was conducted at an 8.4 ha natural grassland in South Brazil. During the winter, early pregnancy ewes were submitted to two grazing methods (continuous (CS) and rotative (RS) stoking) and two herbage allowances (HA; 12 and 18% live weight)), resulting in four treatments: CS18, CS12, RS18 and RS12. It was measured the DWG and body condition score (BCS) from ewes and from ewes and lambs after born, as well lambs area production. During the winter only the HA change the DWG from the ewes. During the spring differences were found only in the lambs DWG from grazing method, been higher in CS. A grazing method × HA interaction indicate that the higher lambs area production was achieved in the CS12 treatment. The results indicate that the grazing methods and HA had a little influence in the animal performance over winter and the herbage could be better used in this period.

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References

David D.B. 2008. Recria de cordeiras suplementadas em campo nativo: níveis de atendimento das exigências nutricionais e suas relações com a resposta animal. Porto Alegre: UFRGS. Dissertação de Mestrado - Universidade Federal do Rio Grande do Sul. pp.135.

Moojen E.L & G.E. 2002. Potencial produtivo de uma pastagem nativa do Rio Grande do Sul submetida a níveis de oferta de forragem. Ciênc. Rural 32(1): 127-132.

Russel J.F., M. Doney & R.G. Gunn. 1969. Subjective assessment of body fat in live sheep. J. Agric. Sci. 72: 451-454.

Soares A.B. 2002. da alteração da oferta de matéria seca de uma pastagem natural sobre a produção animal e a dinamica da vegetação. Tese (Doutorado). Faculdade de Agronomia, Universidade Federal do Rio Grande do Sul, Porto Alegre. pp. 187.

Wilm H.G., O.F. Costelo & G.E. Klippe. 1944. Estimating forage yield by the double sampling method. J. Am. Soc. Agron. Geneva 36: 194-203.

NRC (National Research Council). 2007. Nutrient requirements of small ruminants: sheep, goats, cervids and new world camelids. Washington: National Academy Press. pp.362.

Published

2020-03-21

How to Cite

Jochims, F., Poli, C. H. E. C., Amaral, G. A., David, D. B., Azevedo, E. B., & Fajardo, N. C. (2020). Ewes and lamb performance managed with different grazing methods and herbage allowance in natural grassland. Semiárida, 22, 85–88. Retrieved from https://cerac.unlpam.edu.ar/ojs/index.php/semiarida/article/view/4462